CN106130419B - Direct current motor control device, direct current motor control method, direct current motor and air purifier - Google Patents
Direct current motor control device, direct current motor control method, direct current motor and air purifier Download PDFInfo
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- CN106130419B CN106130419B CN201610520718.2A CN201610520718A CN106130419B CN 106130419 B CN106130419 B CN 106130419B CN 201610520718 A CN201610520718 A CN 201610520718A CN 106130419 B CN106130419 B CN 106130419B
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- duty ratio
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- drive signal
- direct current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention relates to the field of control, in particular to a direct current motor control device, a direct current motor control method, a direct current motor and an air purifier. The control device comprises a storage unit, a judgment unit and a control unit; the storage unit is used for storing the corresponding relation between the operation stage of the direct current motor and the duty ratio adjustment of the motor driving signal; the judging unit is used for determining the operation stage of the direct current motor; and the control unit is used for controlling the adjustment of the duty ratio of the motor driving signal according to the operation stage determined by the judging unit and the corresponding relation. According to the scheme provided by the invention, the rotating speed of the direct current motor is regulated by regulating the duty ratio PWM, and in the regulation process, corresponding regulation modes are provided aiming at different stages of the direct current motor so as to gradually reach the target rotating speed and reduce the possibility of locked rotor.
Description
Technical field
The present invention relates to control field more particularly to DC machine control device, control method, direct current generator and air are net
Change device.
Background technique
In engineering, if rated speed is not achieved in motor speed within the starting time of design, then it is assumed that occur stifled
Turn.If stall occurs for motor, adverse effect not only is caused to power grid and motor itself, but also to the equipment and building ring of dragging
Border can also generate adverse consequences, or even can have serious consequences.
Summary of the invention
It is a primary object of the present invention to overcome the defect of the above-mentioned prior art, a kind of DC MOTOR CONTROL dress is provided
It sets, control method, direct current generator and air purifier, is effectively adjusted with solving the revolving speed of direct current generator, effectively to reach target
Revolving speed avoids the occurrence of stall.
One aspect of the present invention provides a kind of control device of direct current generator comprising storage unit, judging unit, with control
Unit processed；
The storage unit, for storing between the direct current generator operation phase and the adjustment of motor drive signal duty ratio
Corresponding relationship；
The judging unit, for determining the operation phase of the direct current generator；
Described control unit, operation phase and the corresponding relationship for being determined according to the judging unit control electricity
The adjustment of machine drive signal duty cycle.
Optionally, the operation phase includes at least one of stage, the stage of shutting down after startup stage, starting.
Optionally, when the operation phase includes startup stage, motor drive signal duty ratio corresponding with startup stage
Adjustment specifically:
When motor speed is more than or equal to the first revolving speed, and the duty ratio is less than the first duty cycle threshold, accounted for described
Empty ratio is adjusted to the first duty cycle threshold.
Optionally, when the operation phase includes the stage after starting, motor driven letter corresponding with the stage after the starting
The adjustment of number duty ratio specifically:
When actual speed is greater than setting speed, the duty ratio of motor drive signal is reduced, when actual speed is less than setting
When revolving speed, and the difference of setting speed and actual speed be greater than the first difference when, improve the duty ratio of motor drive signal.
Optionally, the difference of the setting speed and actual speed is bigger, the duty ratio for improving motor drive signal
Adjustment amplitude it is bigger.
Optionally, the storage unit further includes the duty ratio adjustment amplitude and the setting speed of motor drive signal
With the second corresponding relationship of the difference of actual speed, the raising motor drive signal is determined according to second corresponding relationship
The adjustment amplitude of duty ratio.
Optionally, first determine whether the duty ratio of motor drive signal accounts for less than second after the stage after entering starting
Sky adjusts the duty ratio of machine driving signal to the second duty cycle threshold if being less than than threshold value；Second duty cycle threshold
Equal to direct current generator duty ratio lower limit value.
Optionally, the operation phase includes shutting down the stage, motor drive signal duty ratio tune corresponding with the stage of shutting down
It is whole specifically:
If duty ratio is more than or equal to third duty cycle threshold, duty ratio is down to one in the 1/8 to 1/5 of former duty ratio
Value, then zero is down to first rate；If duty ratio is less than third duty cycle threshold, duty ratio is adjusted to zero.
Optionally, described device further includes stall determination unit, is used for after the time being more than or equal to first time threshold, electricity
Setting speed is not achieved in the actual speed of machine, it is determined that motor rotation blockage.
Optionally, described device further includes rotation-clogging protection unit, for inciting somebody to action after stall determination unit determines motor rotation blockage
The duty ratio of motor drive signal adjusts to the direct current generator duty ratio upper limit and keeps second time threshold, if motor speed is not up to
To the second revolving speed, then enter electric motor protecting state；Or after stall determination unit determines motor rotation blockage, by motor drive signal
Duty ratio adjust to the upper limit and keep second time threshold, if motor speed is not achieved the second revolving speed, stall third time threshold
After value, then the duty ratio of motor drive signal is adjusted to the upper limit and keeps the 4th time threshold, if motor speed is still not achieved
Second revolving speed then enters electric motor protecting state.
The present invention also provides a kind of direct current generators, which is characterized in that the control including any of the above-described direct current generator
Device processed.
The present invention also provides a kind of air purifiers comprising above-mentioned direct current generator includes above-mentioned control device.
The present invention also provides a kind of control methods of direct current generator comprising:
Store the corresponding relationship between the direct current generator operation phase and the adjustment of motor drive signal duty ratio；
Determine the operation phase of the direct current generator；
According to the adjustment of determining operation phase and corresponding relationship control motor drive signal duty ratio.
Optionally, the operation phase includes at least one of stage, the stage of shutting down after startup stage, starting.
Optionally, when the operation phase includes startup stage, motor drive signal duty ratio corresponding with startup stage
Adjustment specifically:
When motor speed is more than or equal to the first revolving speed, and the duty ratio is less than the first duty cycle threshold, accounted for described
Empty ratio is adjusted to the first duty cycle threshold.
Optionally, when the operation phase includes the stage after starting, motor driven letter corresponding with the stage after the starting
The adjustment of number duty ratio specifically:
When actual speed is greater than setting speed, the duty ratio of motor drive signal is reduced, when actual speed is less than setting
When revolving speed, and the difference of setting speed and actual speed be greater than the first difference when, improve the duty ratio of motor drive signal.
Optionally, the difference of the setting speed and actual speed is bigger, the duty ratio for improving motor drive signal
Adjustment amplitude it is bigger.
Optionally, the method also includes store motor drive signal duty ratio adjustment amplitude and the setting speed with
Second corresponding relationship of the difference of actual speed determines accounting for for the raising motor drive signal according to second corresponding relationship
The adjustment amplitude of empty ratio.
Optionally, first determine whether the duty ratio of motor drive signal accounts for less than second after the stage after entering starting
Sky adjusts the duty ratio of machine driving signal to the second duty cycle threshold if being less than than threshold value；Second duty cycle threshold
Equal to direct current generator duty ratio lower limit value.
Optionally, the operation phase includes shutting down the stage, motor drive signal duty ratio tune corresponding with the stage of shutting down
It is whole specifically:
If duty ratio is more than or equal to third duty cycle threshold, duty ratio is down to one in the 1/8 to 1/5 of former duty ratio
Value, then zero is down to first rate；If duty ratio is less than third duty cycle threshold, duty ratio is adjusted to zero.
Optionally, the method also includes stalls to determine step, is used for after the time being more than or equal to first time threshold, electricity
Setting speed is not achieved in the actual speed of machine, it is determined that motor rotation blockage.
Optionally, the method also includes rotation-clogging protection steps, are used for after determining motor rotation blockage, by motor drive signal
Duty ratio adjust to the direct current generator duty ratio upper limit and keep second time threshold, if the second revolving speed is not achieved in motor speed,
Then enter electric motor protecting state；Or after determining motor rotation blockage, the duty ratio of motor drive signal is adjusted to the upper limit and protected
Second time threshold is held, if motor speed is not achieved the second revolving speed, after stalling third time threshold, then by motor drive signal
Duty ratio adjusts to the upper limit and keeps the 4th time threshold, if the second revolving speed is still not achieved in motor speed, enters electric motor protecting
State.
Scheme provided by the invention adjusts the revolving speed of direct current generator, during the adjustment, needle by adjusting duty ratio PWM
Corresponding adjustment mode is provided to direct current generator different phase, a possibility that progressively reach rotating speed of target, reduce stall.
The present invention also provides the gradually processing modes after the stall of direct current generator, and carry out rotation-clogging protection to prevent because stifled
Turn to cause adverse effect to power grid and motor itself.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the control device of direct current generator in an embodiment provided by the invention；
Fig. 2 is the schematic diagram of direct current generator in an embodiment provided by the invention；
Fig. 3 is the schematic diagram of air purifier in an embodiment provided by the invention；
Fig. 4 is the step schematic diagram of DC motor control method in an embodiment provided by the invention；
Fig. 5 is the control device for detecting and protecting comprising stall in another embodiment provided by the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The problem of being easy to happen stall based on current direct current generator, the present invention provides a kind of control of direct current generator dresses
It sets, which controls direct current generator from open state, until reaching rotating speed of target.The control device, it is specific to wrap
It includes: including storage unit, judging unit, with control unit；Fig. 1 shows the connection relationship of each unit, wherein
Storage unit, for storing the corresponding pass between direct current generator operation phase and the adjustment of motor drive signal duty ratio
System calls for control unit.Since direct current generator is from the stages such as be switched on, start, operate, shut down, the running speed of motor is all
Difference establishes suitable corresponding relationship, and then gradually adjusting revolving speed by the corresponding relationship can just promote motor to work normally.?
The revolving speed of direct current generator is adjusted using PWM (pulse width modulation) duty ratio is adjusted in this technology.Pwm duty ratio is exactly one
The ratio of the shared whole cycle of high level in pulse period.Such as high level 1 second 1 second low level PWM wave duty ratio is
50%.Pwm is exactly pulse width modulation.
Judging unit, for determining the operation phase of direct current generator；The determining operation phase is shared to control by judging unit
Unit processed, control unit calls the corresponding relationship of storage unit storage according to the operation phase that judging unit determines, and then adjusts
Whole control motor drive signal duty ratio.
For the different stages, following Adjusted Option (i.e. corresponding relationship) is provided:
Startup stage after booting, motor drive signal duty ratio adjustment corresponding with startup stage specifically:
When motor speed is more than or equal to the first revolving speed, and duty ratio is less than the first duty cycle threshold, duty ratio is adjusted
To the first duty cycle threshold, first duty cycle threshold need it is specific according to direct current generator model, power, duty cycle range etc. and
It is fixed.
The stage adjustment principle be avoid duty ratio PWM too small first, make PWM be maintained at the lower limit of normal range (NR) with
On, while PWM will keep almost the same with revolving speed, which is set to the basic revolving speed of starting.
After starting when the stage, motor drive signal duty ratio adjustment corresponding with the stage after starting specifically:
Optionally, judge that the duty ratio of motor drive signal whether less than the second duty cycle threshold, drives machine if being less than
The duty ratio of dynamic signal is adjusted to the second duty cycle threshold, and too small to avoid duty ratio, the second duty cycle threshold is equal to direct current
Machine duty ratio lower limit value；After the adjustment, into the gradually adjusting stage of revolving speed.
In the gradually adjustment of revolving speed, when actual speed is greater than setting speed, the duty ratio of motor drive signal is reduced,
Actual speed is reduced by reducing duty ratio；When actual speed is less than setting speed, and setting speed and actual speed
Difference be greater than the first difference when, improve the duty ratio of motor drive signal.Setting speed and reality are followed during the adjustment
The difference of revolving speed is bigger, and the adjustment amplitude for improving the duty ratio of motor drive signal is bigger.
Simultaneously in order to avoid anxious tune, slow adjust cause stall, control adjustment amplitude and adjustment time are paid attention to, in adjustment to reach
To the purpose gradually adjusted.The duty ratio adjustment amplitude and setting speed and actual speed of motor drive signal can specifically be followed
Difference the second corresponding relationship, according to the second corresponding relationship determine improve motor drive signal duty ratio adjustment amplitude.
Second corresponding relationship can also be put in the memory unit, be called for control unit.
When direct current generator is after above-mentioned adjustment progressively reaches rotating speed of target, direct current generator enters normal phase run.
In the stage of shutting down, motor drive signal duty ratio adjustment corresponding with the stage of shutting down specifically:
If duty ratio is more than or equal to third duty cycle threshold, duty ratio is down to one in the 1/8 to 1/5 of former duty ratio
Value, then zero is down to first rate；If duty ratio is less than third duty cycle threshold, duty ratio is adjusted to zero.
The description of above length is that gradually adjustment DC motor speed is to rotating speed of target, to avoid blocking phenomenon, actually
The prevention of stall.The detection and protection of stall are described below, as shown in figure 5:
For the detection and protection of stall, above-mentioned apparatus further includes stall determination unit, for determining stall, determining original
Then are as follows: stall determination unit obtains runing time of the direct current generator from after being switched on, which is compared with first time threshold
Compared with after the time being more than or equal to first time threshold, setting speed is not achieved in the actual speed of motor, it is determined that motor rotation blockage.
Above-mentioned apparatus further includes rotation-clogging protection unit, for after stall determination unit determines motor rotation blockage, motor to be driven
The duty ratio of dynamic signal adjusts to the direct current generator duty ratio upper limit and keeps second time threshold, if motor speed is not achieved second
Revolving speed then enters electric motor protecting state.
It should be noted that in other examples, can to whether entering electric motor protecting state and repeatedly confirmed,
Such as: confirmed twice, executive mode are as follows: after stall determination unit determines motor rotation blockage, by motor drive signal
Duty ratio adjusts to the upper limit and keeps second time threshold, if the second revolving speed is not achieved in motor speed, stalls third time threshold
Afterwards, then the duty ratio of motor drive signal is adjusted to the upper limit and keeps the 4th time threshold, if motor speed is still not achieved the
Two revolving speeds then enter electric motor protecting state.
Embodiment 1
For the above embodiments principle, a kind of specific control of direct current generator is provided below by the present embodiment 1:
In the present embodiment, the revolving speed of direct current generator is realized by controlling the size of duty ratio PWM, this direct current generator
Duty ratio PWM range is 5%-75%.
The revolving speed of direct current generator uses M velocimetry (measured frequency method), in certain sampling period Tm, produced by encoder
Umber of pulse be known as M velocimetry come the method for determining speed.If encoder rotate a circle generate P pulse (P for selection coding
The important evidence of device is constant), and m1 pulse is obtained in preset sampling period Tm, then available motor
Revolutions per minute, that is, revolving speed nM are as follows:
It is first powered on, in open state, judges DC motor speed, if revolving speed is less than 180R/min, PWM accounting, which is not done, to be located
Reason；If revolving speed is more than or equal to 180R/min, and PWM accounting less than 7.5%, then PWM is set as 7.5% accounting, otherwise remains current
PWM accounting.Then it determines and enters next stage.
After electric motor starting, duty ratio is adjusted according to the difference of actual speed and setting speed, works as actual speed > setting speed
When, duty ratio is reduced；When actual speed < setting speed (△ R=setting speed-actual speed), improves duty ratio PWM and increase
Add.
By taking PWM cycle is 1 millisecond as an example, when adjusting PWM, the period is constant, changes duty ratio by adjusting high level time,
High level tune 1us is equivalent to duty ratio and has adjusted 1/1000.Specific adjusting parameter (i.e. the second corresponding relationship) is specifically shown in Table 1 institute
Show, the difference of setting speed and actual speed is bigger, and the adjustment amplitude of the duty ratio for improving motor drive signal is bigger.
| Rotating speed difference (r/min) | Duty ratio high level adjustment time (us) |
| △ R >=100 | 5 |
| 100 > △ R >=80 | 3 |
| 80 > △ R >=60 | 2 |
| 60 > △ R >=40 | 1.5 |
| 40 > △ R >=20 | 1 |
| 20 > △ R >=10 | 0.5 |
| △R<10 | It does not adjust |
Direct current generator is adjusted into the normal operation stage by above-mentioned.
It is shut down the stage in direct current generator, motor 310V power supply is disconnected, while judging PWM accounting at this time, if duty ratio PWM
More than or equal to 22.5%, accounting is subtracted 15% (in the 1/8-1/5 of former duty ratio), if accounting is less than 22.5%, accounting is direct
It is reduced to 0, PWM duty cycle is gradually hereafter reduced to 0.
During entire above-mentioned adjustment, control device is also carrying out stall detection and rotation-clogging protection:
After duration of runs after booting is more than or equal to first time threshold, the actual speed of motor is not achieved setting and turns
Speed, it is determined that motor rotation blockage.
Once it is determined that stall, blow in machine, and PWM modulation upper limit value (75%) operates 15 seconds, if the revolving speed of direct current generator
No more than 300rpm, then, again by PWM modulation upper limit value (75%), will be operated 15 seconds, if also after blower 5 seconds out of service, 5 seconds
It is that 300rpm is not achieved, then is directly entered rotation-clogging protection.
Into after rotation-clogging protection, all loads are closed, prompt failure, key is effective, and shutdown does not show failure, turns back on
Remove failure.
The present invention also protects a kind of direct current generator, as shown in Fig. 2, the direct current generator includes that above-mentioned DC MOTOR CONTROL fills
It sets.
The present invention also protects a kind of air purifier, as shown in figure 3, the air purifier uses above-mentioned direct current generator.
In order to which the control flow to above-mentioned direct current generator carries out more clear, clearer arrangement, direct current generator is described below
Control method, as shown in Figure 4, comprising:
Step 110, the corresponding relationship between direct current generator operation phase and the adjustment of motor drive signal duty ratio is stored；
Step 120, the operation phase of direct current generator is determined；
Step 130, according to the adjustment of determining operation phase and corresponding relationship control motor drive signal duty ratio.
Wherein, the operation phase includes at least one of stage, the stage of shutting down after startup stage, starting.
When operation phase is startup stage, motor drive signal duty ratio adjustment corresponding with startup stage specifically:
When motor speed is more than or equal to the first revolving speed (180R/min in such as embodiment 1), and duty ratio is accounted for less than first
When sky is than threshold value (7.5% in such as embodiment 1), duty ratio is adjusted to the first duty cycle threshold (in such as embodiment 1
7.5%).
Motor enters stage after starting, motor drive signal duty ratio adjustment corresponding with the stage after starting specifically:
The duty ratio of motor drive signal is judged whether less than the second duty cycle threshold (5% in such as embodiment 1), if small
In then the duty ratio of machine driving signal being adjusted to the second duty cycle threshold (5% in such as embodiment 1)；Second duty cycle threshold
Equal to the lower limit value of direct current generator duty cycle range (such as embodiment 15%-75%)；
When actual speed is greater than setting speed, the duty ratio of motor drive signal is reduced, when actual speed is less than setting
When revolving speed, and the difference of setting speed and actual speed be greater than the first difference (10R/min in such as embodiment 1) when, improve electricity
The difference of the duty ratio of machine driving signal, setting speed and actual speed is bigger, improves the tune of the duty ratio of motor drive signal
Whole picture degree is bigger.The second corresponding relationship of the difference of amplitude and setting speed and actual speed is adjusted according to duty ratio；To improve
The adjustment amplitude of the duty ratio of motor drive signal.
Therefore, further include step 140 before step 130:
Step 140, by the second corresponding relationship of duty ratio adjustment amplitude and the difference of setting speed and actual speed；Second
Corresponding relationship sees the above table 1.
In the stage of shutting down, motor drive signal duty ratio adjustment corresponding with the stage of shutting down specifically:
If duty ratio is more than or equal to third duty cycle threshold (22.5% in such as embodiment 1), duty ratio is down to original and is accounted for
A value (15% in such as embodiment 1) in the 1/8 to 1/5 of empty ratio, then zero is down to first rate；If duty ratio is less than
Three duty cycle thresholds (22.5% in such as embodiment 1), then duty ratio is adjusted to zero.
It further include step 150 during the adjustment of step 130,
Step 150, stall determines step, is used for after the time being more than or equal to first time threshold, the actual speed of motor
Setting speed is not achieved, it is determined that motor rotation blockage.
Step 160, rotation-clogging protection step,
At least there are two types of executive modes for the step:
Mode one adjusts the duty ratio of motor drive signal to direct current generator duty ratio after determining motor rotation blockage
Limit (75% in such as embodiment 1) simultaneously keeps second time threshold (15 seconds in such as embodiment 1), if motor speed is not achieved second
Revolving speed (such as embodiment 1300r/min) then enters electric motor protecting state.
Into after rotation-clogging protection, all loads are closed, prompt failure, key is effective, and shutdown does not show failure, turns back on
Remove failure.
Mode two adjusts the duty ratio of motor drive signal to the upper limit (in such as embodiment 1 after determining motor rotation blockage
75%) and keep second time threshold (15 seconds in such as embodiment 1), if the second revolving speed (such as embodiment is not achieved in motor speed
1300r/min), stall third time threshold (5 seconds in such as embodiment 1) after, then by the duty ratio of motor drive signal adjust to
The upper limit (75% in such as embodiment 1) simultaneously keeps the 4th time threshold (15 seconds in such as embodiment 1), if motor speed is still not achieved
Second revolving speed (such as embodiment 1300r/min) then enters electric motor protecting state.
Into after rotation-clogging protection, all loads are closed, prompt failure, key is effective, and shutdown does not show failure, turns back on
Remove failure.
Function described herein can be implemented in hardware, the software executed by processor, firmware or any combination thereof.
If implemented in the software executed by processor, computer can be stored in using function as one or more instructions or codes
It is transmitted on readable media or via computer-readable media.Other examples and embodiment are wanted in the present invention and appended right
It asks in the scope and spirit of book.For example, due to the property of software, function described above can be used by processor,
Hardware, firmware, hardwired or the software implementation for appointing the combination of whichever to execute in these.In addition, each functional unit can integrate
In one processing unit, it is also possible to each unit to physically exist alone, can also be integrated in two or more units
In one unit.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, and fill as control
The component set may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
Described is only the embodiment of the present invention, is not intended to restrict the invention, and is come for those skilled in the art
It says, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any modification, equivalent
Replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (13)
1. a kind of control device of direct current generator, which is characterized in that including storage unit, judging unit, with control unit；
The storage unit, for storing pair between the direct current generator operation phase and the adjustment of motor drive signal duty ratio
It should be related to, the operation phase includes at least one of stage, the stage of shutting down after startup stage, starting；
The judging unit, for determining the operation phase of the direct current generator；
Described control unit, operation phase and corresponding relationship control motor for being determined according to the judging unit drive
The adjustment of dynamic signal dutyfactor；When the operation phase includes startup stage, motor drive signal corresponding with startup stage is accounted for
Sky is than adjustment specifically: when motor speed is less than the first revolving speed, the duty ratio is constant, when motor speed is more than or equal to first turn
Speed, and when the duty ratio is less than the first duty cycle threshold, the duty ratio is adjusted to the first duty cycle threshold, is accounted for when described
When sky is than being greater than or equal to the first duty cycle threshold, the duty ratio is constant；
It further include stall determination unit, for after the time being more than or equal to first time threshold, the actual speed of motor to be not achieved
Setting speed, it is determined that motor rotation blockage；
When the operation phase includes the stage after starting, motor drive signal duty ratio adjustment corresponding with the stage after the starting
Specifically: when actual speed is greater than setting speed, the duty ratio of motor drive signal is reduced, is turned when actual speed is less than setting
When fast, and the difference of setting speed and actual speed be greater than the first difference when, improve the duty ratio of motor drive signal；
The operation phase includes motor drive signal duty ratio adjustment corresponding with the stage of shutting down when shutting down the stage specifically:
If duty ratio is more than or equal to third duty cycle threshold, duty ratio is down to a value in the 1/8 to 1/5 of former duty ratio, then with
First rate is down to zero；If duty ratio is less than third duty cycle threshold, duty ratio is adjusted to zero.
2. the apparatus according to claim 1, which is characterized in that the difference of the setting speed and actual speed is bigger, institute
The adjustment amplitude for stating the duty ratio for improving motor drive signal is bigger.
3. the apparatus according to claim 1, which is characterized in that the storage unit further includes accounting for for motor drive signal
Second corresponding relationship of difference of the sky than adjusting amplitude and the setting speed and actual speed, according to second corresponding relationship
Determine the adjustment amplitude of the duty ratio for improving motor drive signal.
4. device according to claim 1 to 3, which is characterized in that
After entering starting after the stage, first determine whether the duty ratio of motor drive signal whether less than the second duty cycle threshold, if
Less than then the duty ratio of machine driving signal is adjusted to the second duty cycle threshold；Second duty cycle threshold is equal to direct current generator
Duty ratio lower limit value.
5. device according to claim 1-3, which is characterized in that further include rotation-clogging protection unit, for when stifled
Turn the duty ratio of motor drive signal to be adjusted to the direct current generator duty ratio upper limit and kept after determination unit determines motor rotation blockage
Second time threshold enters electric motor protecting state if the second revolving speed is not achieved in motor speed；Or when stall determination unit is true
After determining motor rotation blockage, the duty ratio of motor drive signal is adjusted to the upper limit and keeps second time threshold, if motor speed reaches
Less than the second revolving speed, after stalling third time threshold, then the duty ratio of motor drive signal is adjusted to the upper limit and keeps the 4th
Time threshold enters electric motor protecting state if the second revolving speed is still not achieved in motor speed.
6. a kind of direct current generator, which is characterized in that the control device including any direct current generator of claim 1-5.
7. a kind of air purifier, which is characterized in that the direct current generator includes any direct current generator of claim 1-5
Control device.
8. a kind of control method of the control device for any one of the claim 1-5 direct current generator, which is characterized in that packet
It includes:
Store the corresponding relationship between the direct current generator operation phase and the adjustment of motor drive signal duty ratio；
Determine the operation phase of the direct current generator；
According to the adjustment of determining operation phase and corresponding relationship control motor drive signal duty ratio；The operation rank
Section includes at least one of stage, the stage of shutting down after startup stage, starting；
When the operation phase includes startup stage, motor drive signal duty ratio adjustment corresponding with startup stage specifically:
When motor speed is less than the first revolving speed, the duty ratio is constant, when motor speed is more than or equal to the first revolving speed, and the duty ratio
When less than the first duty cycle threshold, the duty ratio is adjusted to the first duty cycle threshold, when the duty ratio is greater than or equal to
When the first duty cycle threshold, the duty ratio is constant；
When the operation phase includes the stage after starting, motor drive signal duty ratio adjustment corresponding with the stage after the starting
Specifically: when actual speed is greater than setting speed, the duty ratio of motor drive signal is reduced, is turned when actual speed is less than setting
When fast, and the difference of setting speed and actual speed be greater than the first difference when, improve the duty ratio of motor drive signal；
The operation phase includes shutting down the stage, motor drive signal duty ratio adjustment corresponding with the stage of shutting down specifically: if
Duty ratio is more than or equal to third duty cycle threshold, then duty ratio is down to a value in the 1/8 to 1/5 of former duty ratio, then with the
One rate is down to zero；If duty ratio is less than third duty cycle threshold, duty ratio is adjusted to zero.
9. according to the method described in claim 8, it is characterized in that, the difference of the setting speed and actual speed is bigger, institute
The adjustment amplitude for stating the duty ratio for improving motor drive signal is bigger.
10. according to the method described in claim 9, it is characterized in that, further including the duty ratio adjustment for storing motor drive signal
Second corresponding relationship of the difference of amplitude and the setting speed and actual speed, determines according to second corresponding relationship and improves
The adjustment amplitude of the duty ratio of motor drive signal.
11. according to the method described in claim 8, it is characterized in that,
After entering starting after the stage, first determine whether the duty ratio of motor drive signal whether less than the second duty cycle threshold, if
Less than then the duty ratio of machine driving signal is adjusted to the second duty cycle threshold；Second duty cycle threshold is equal to direct current generator
Duty ratio lower limit value.
12. according to any method of claim 8-11, which is characterized in that further include that stall determines step, at that time
Between be more than or equal to first time threshold after, setting speed is not achieved in the actual speed of motor, it is determined that motor rotation blockage.
13. according to the method for claim 12, which is characterized in that further include rotation-clogging protection step, for when determining motor
After stall, the duty ratio of motor drive signal is adjusted to the direct current generator duty ratio upper limit and keeps second time threshold, if electric
Machine turn up then enters electric motor protecting state less than the second revolving speed；Or after determining motor rotation blockage, by motor drive signal
Duty ratio adjusts to the upper limit and keeps second time threshold, if the second revolving speed is not achieved in motor speed, stalls third time threshold
Afterwards, then the duty ratio of motor drive signal is adjusted to the upper limit and keeps the 4th time threshold, if motor speed is still not achieved the
Two revolving speeds then enter electric motor protecting state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610520718.2A CN106130419B (en) | 2016-07-01 | 2016-07-01 | Direct current motor control device, direct current motor control method, direct current motor and air purifier |
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| CN201610520718.2A CN106130419B (en) | 2016-07-01 | 2016-07-01 | Direct current motor control device, direct current motor control method, direct current motor and air purifier |
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| CN106130419B true CN106130419B (en) | 2019-10-01 |
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| CN110048648B (en) * | 2019-03-19 | 2021-03-16 | 维沃移动通信有限公司 | A motor control method and terminal device |
| CN112140066B (en) * | 2019-06-11 | 2024-04-09 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN112994534B (en) * | 2019-12-18 | 2023-05-26 | 珠海格力电器股份有限公司 | Brushless direct current motor control method and device, brushless direct current motor and electric appliance |
| CN113014151B (en) * | 2019-12-18 | 2023-12-19 | 珠海格力电器股份有限公司 | Brushless direct current motor control method and device, brushless direct current motor and electric appliance |
| CN112593777B (en) * | 2020-12-16 | 2021-07-13 | 珠海格力电器股份有限公司 | Motor control method of intelligent door lock and intelligent door lock |
| CN114642371A (en) * | 2020-12-18 | 2022-06-21 | 广东美的生活电器制造有限公司 | Control method of household appliance, household appliance and computer readable storage medium |
| CN112803839B (en) * | 2020-12-31 | 2022-10-28 | 珠海格力电器股份有限公司 | Method and device for controlling rotating speed of air conditioner motor, storage medium and processor |
| CN113945845A (en) * | 2021-09-01 | 2022-01-18 | 深圳拓邦股份有限公司 | A method for detecting working environment before starting a motor, a motor and an electrical appliance |
| CN115459218B (en) * | 2022-09-20 | 2024-08-02 | 广东尚研电子科技股份有限公司 | DC motor driving device and locked rotor protection method thereof |
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| CN115954830B (en) * | 2023-03-13 | 2023-05-16 | 四川职业技术学院 | Motor overheat protection method and device for air purification and air purifier |
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