JPS5612886A - Speed control device for dc motor - Google Patents
Speed control device for dc motorInfo
- Publication number
- JPS5612886A JPS5612886A JP8845979A JP8845979A JPS5612886A JP S5612886 A JPS5612886 A JP S5612886A JP 8845979 A JP8845979 A JP 8845979A JP 8845979 A JP8845979 A JP 8845979A JP S5612886 A JPS5612886 A JP S5612886A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- capacitor
- circuit
- motor
- transistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02P7/2913—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 whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
PURPOSE:To increase the torque compensating amount at low speed time of a DC motor by providing a peak value fork and a circuit for reference level setting or the like. CONSTITUTION:A capacitor C2 forming a peak value fork circuit PF is charged through a diode D7 by the speed feedback voltage of a motor M as detected by a transistor Q1, and a resistor R0 graudally discharges the capacitor C2 during the conducting period of the transistor Q2 in which no divided voltage Vn is generated from the speed feedback voltage. Accordingly, the fluctuation of the voltage Vn does not exert an affect to the input voltage to a comparator COMP, and the voltage across the capacitor C2 is supplied through a reference level setting circuit Rc to the COMP. Since the transistor Q5 of the circuit RC exhibits an impedance substantially equal to zero when the voltage across the capacitor C2 is zero, the reverse feedback voltage level can be arbitrarily set by selecting the values of the resistors R10, R11. Accordingly, it can increase the torque compensating amount at low speed time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8845979A JPS5612886A (en) | 1979-07-12 | 1979-07-12 | Speed control device for dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8845979A JPS5612886A (en) | 1979-07-12 | 1979-07-12 | Speed control device for dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5612886A true JPS5612886A (en) | 1981-02-07 |
Family
ID=13943362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8845979A Pending JPS5612886A (en) | 1979-07-12 | 1979-07-12 | Speed control device for dc motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5612886A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788478A (en) * | 1986-09-26 | 1988-11-29 | Nec Corporation | Speed control system for DC motor |
-
1979
- 1979-07-12 JP JP8845979A patent/JPS5612886A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4788478A (en) * | 1986-09-26 | 1988-11-29 | Nec Corporation | Speed control system for DC motor |
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