KR102831329B1 - Motor driving apparatus, and motor emergency breaking method - Google Patents

Abstract

A motor driving device according to one embodiment of the present invention includes a power supply unit that receives battery power or ignition power and supplies power to a control unit, a gate driver that receives battery power or ignition power and operates a switch of the motor driving unit, a control unit that receives power from the power supply unit and controls the gate driver, and a motor driving unit that receives battery power and drives a motor, wherein the power supply unit and the gate driver are characterized in that they receive ignition power when an abnormality occurs in the supply of battery power.

Description

{Motor driving apparatus, and motor emergency breaking method}

The present invention relates to a motor driving device, and more specifically, to a motor driving device for driving a motor using ignition power in an emergency, and a motor emergency braking method.

In general, an ECU (Electronic Control Unit) is an electronic control device that controls various internal operations of a vehicle, and includes MCU, PMIC, gate driver IC, etc. The ECU operates by receiving power from the battery when the ignition (IGN) is turned on.

If the power from the battery is cut off due to external factors or internal factors of the ECU, the internal parts of the ECU, such as the PMIC and Gate Driver, are suddenly shut down, and if the motor is being driven, the motor control is impossible, making it impossible to stably brake the motor. In addition, there is a problem in that information about the corresponding failure situation cannot be transmitted to the upper controller.

The technical problem to be solved by the present invention is to provide a motor driving device and a motor emergency braking method for driving a motor using ignition power in an emergency.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

In order to solve the above technical problem, a motor driving device according to one embodiment of the present invention includes a power supply unit which receives battery power or ignition power and supplies power to a control unit; a gate driver which receives the battery power or the ignition power and operates a switch of a motor driving unit; a control unit which receives power from the power supply unit and controls the gate driver; and a motor driving unit which receives the battery power and drives a motor, wherein the power supply unit and the gate driver are characterized in that they receive the ignition power when an abnormality occurs in the supply of the battery power.

Additionally, the battery power supply line and the ignition power supply line can be wired and connected to the power supply unit and the gate driver.

Additionally, the control unit can control the gate driver so that the motor driving unit operates in motor braking mode when an abnormality occurs in the supply of the battery power.

Additionally, the control unit can control the gate driver so that a short circuit is formed in the upper switch or the lower switch forming the motor driving unit when an abnormality occurs in the supply of the battery power.

In addition, the control unit can pull up the upper switch forming the motor driving unit to the first voltage and turn off the lower switch when an abnormality occurs in the supply of the battery power.

In addition, the control unit can pull down the lower switch forming the motor driving unit to ground voltage and turn off the upper switch when an abnormality occurs in the supply of the battery power.

Additionally, the control unit can control a pulse width modulation signal output from the gate driver when an abnormality occurs in the supply of the battery power.

Additionally, the control unit can transmit an alarm to a higher controller or vehicle system if an abnormality occurs in the supply of battery power.

In addition, the motor driving unit is formed of three upper switches and three lower switches, and the upper switches and the lower switches can be complementarily conducted.

Additionally, it may include a battery power detection unit that detects the battery power.

Additionally, the power supply unit and the gate driver can receive the ignition power for a predetermined period of time when an abnormality occurs in the supply of the battery power.

Additionally, it may include a diode connecting the ignition power source, the power supply, and the gate driver.

Additionally, the motor drive device can drive a motor that operates the gears of the vehicle.

In order to solve the above technical problem, a motor emergency braking method according to another embodiment of the present invention includes the steps of: detecting whether there is an abnormality in the supply of battery power; operating by receiving ignition power when an abnormality occurs in the supply of the battery power; the step of controlling a gate driver so that a plurality of switches forming a motor drive unit operate in a motor braking mode; the step of causing the gate driver to operate the switches of the motor drive unit in the motor braking mode; and the step of forming a short circuit in an upper switch or a lower switch of the motor drive unit to brake the motor.

Additionally, the step of controlling the gate driver can control a pulse width modulation signal output from the gate driver.

In addition, the step of operating the switch of the motor driving unit in the motor braking mode may, when an abnormality occurs in the supply of the battery power, pull up the upper switch forming the motor driving unit to the first voltage and turn off the lower switch, or pull down the lower switch to the ground voltage and turn off the upper switch.

Additionally, it may include a step of transmitting information that an abnormality has occurred in the supply of the battery power to a higher controller or vehicle system.

According to embodiments of the present invention, it is possible to determine whether there is a failure and perform stable emergency braking in a situation where the battery power supply is cut off. In addition, the information can be transmitted to a higher controller or vehicle system.

The effects according to the present invention are not limited to those exemplified above, and further diverse effects are included in the present specification.

Figure 1 is a block diagram of a motor driving device according to one embodiment of the present invention.
FIG. 2 is a block diagram of a motor driving device according to another embodiment of the present invention.
FIG. 3 illustrates an implementation example of a motor driving device according to an embodiment of the present invention.
Fig. 4 illustrates a comparative example of a motor driving device according to an embodiment of the present invention.
FIGS. 5 to 8 are drawings for explaining the operation of a motor driving device according to an embodiment of the present invention.
Figure 9 is a flow chart of a motor emergency braking method according to one embodiment of the present invention.
Figure 10 is a flow chart of a motor emergency braking method according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively combined or substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention can be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, can be interpreted in consideration of the contextual meaning of the relevant technology.

Additionally, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as "A and (or at least one) of B, C", it may include one or more of all combinations that can be combined with A, B, C.

In addition, when describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, it may include not only cases where the component is 'connected', 'coupled', or 'connected' directly to the other component, but also cases where the component is 'connected', 'coupled', or 'connected' by another component between the component and the other component.

In addition, when described as being formed or arranged "above" or "below" each component, "above" or "below" includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or arranged between the two components. In addition, when expressed as "above" or "below", the meaning of the downward direction as well as the upward direction based on one component may be included.

Figure 1 is a block diagram of a motor driving device according to one embodiment of the present invention.

A motor driving device (100) according to one embodiment of the present invention is composed of a power supply unit (110), a gate driver (120), a control unit (130), a motor driving unit (140), and may include a battery power detection unit (150) and a diode (160).

The power supply unit (110) receives battery power (210) or ignition power (220) and supplies power to the control unit (130).

More specifically, the power supply unit (110) supplies power to the control unit (130). At this time, the power supply unit (110) can receive power from the battery power (210) or the ignition power (220), convert the power to suit the control unit (130), and supply the converted power to the control unit (130). During normal operation, the battery power (210) is input to supply power to the control unit (130), and when it is difficult to normally receive the battery power (210) and supply it to the control unit (130), the power can be input from the ignition power (220) and supply power to the control unit (130). The battery power is power input from the battery. The ignition is an ignition device, and the ignition power is power for starting the vehicle and supplies power for turning the alternator. In addition, the ignition power enables other components to operate the components of the vehicle. Ignition power is turned on when the key is placed in the key fob or just before the vehicle is started. For vehicles, battery power is supplied through lines KL30 and KL31, and ignition power is supplied through KL15.

The power supply unit (110) may be a PMIC (Power Management IC). A PMIC is a device that converts, distributes, and controls the power required within a device for optimal power performance. Through the PMIC, power can be efficiently managed by actively responding to various load fluctuations.

The gate driver (120) receives battery power (210) or ignition power (220) and operates the switch of the motor drive unit (140).

More specifically, the motor driving unit (140) includes a switch and drives the motor (230) by the operation of the switch. The gate driver generates a signal for turning on and off the switch constituting the motor driving unit (140) and transmits the signal to the motor driving unit (140). The gate driver receives a control signal from the control unit (130) for determining which switch among the switches constituting the motor driving unit (140) is to be turned on and which switch is to be turned off, and accordingly turns the corresponding switch on or off to operate the switch of the motor driving unit (140).

The gate driver can be a Gate Driver IC. A gate driver IC is a device that controls the on/off of a switch by applying or blocking voltage to the gate of a switch composed of a switching element, such as an IGBT or MOSFET, and can receive a logic level voltage and provide a higher power output.

The control unit (130) receives power from the power supply unit (110) and controls the gate driver (120).

More specifically, the control unit (130) receives power from the power supply unit (110) to operate, and controls the gate driver (120) to transmit on/off signals for each switch of the motor drive unit (140) in order to control the operation of the switches of the motor drive unit (140) when the motor (230) is driven. In addition to the gate driver (120), the control unit (130) can perform control on various components within the motor drive device (100), and can detect various pieces of information generated from the motor drive device (100) and control operations to be performed accordingly or generate an alarm to an upper controller or vehicle system.

The control unit (130) may be an MCU (Micro Controller unit). The MCU is a device that performs a set function by making a microprocessor and input/output into a single chip, and plays a role in controlling various functions required in the motor driving device (100).

The motor drive unit (140) receives battery power (210) and drives the motor (230).

More specifically, the motor driving unit (140) receives battery power and supplies it to the motor (230) to drive the motor (230). The motor driving unit (140) may be composed of a plurality of switches, and supplies power to drive the motor (230) by operating the switches according to the signal of the gate driver (120). Here, the motor (230) may be a motor that operates the gear of the vehicle. That is, the motor driving device (100) may be an ECU (Electronic Control Unit) that drives the motor that operates the gear of the vehicle. In addition, it may be a device that drives various motors (230).

The motor driving unit (140) may be formed by three high side switches and three low side switches. One high side switch and one low side switch may be connected to each other to form a pair and form one half bridge circuit. That is, the motor driving unit (140) may be formed by three half bridge circuits. At this time, the high side switch and the low side switch may be complementarily conductive. The high side switch and the low side switch forming the half bridge may be complementarily conductive to each other and supply power to the motor (230). Each switch of the motor driving unit (140) may be complementarily conductive between the high side switch and the low side switch according to the signal of the gate driver (120). At this time, the control unit (130) may control the duty ratio of each switch of the signal output from the gate driver (120) to control the operation of the switch. Three half-bridge circuits can supply three-phase power with different phases to the motor (230). The motor drive unit (140) can convert DC power into three-phase AC power through six switch operations and supply it to the motor (230), and can be called an inverter because it converts DC power into AC power.

The power supply unit (110) and the gate driver (120) receive ignition power (220) when there is an abnormality in the supply of battery power (210). The battery power (210) may be a battery power (KL30) input terminal that receives power from the battery, and the ignition power (220) may be an ignition power (KL15) input terminal that receives power from the ignition. The power supply unit (110) and the gate driver (120) receive power from the battery power (210) under normal circumstances. However, when there is an abnormality in the supply of the battery power (210), it is difficult to receive power normally from the battery power (210), so they receive power from the ignition power (220) instead of the battery power (210) and operate. That is, in an emergency where it is difficult to receive power from the battery power (210), they receive ignition power (220) and perform emergency operation.

For this purpose, the battery power supply line and the ignition power supply line can be connected to the power supply unit (110) and the gate driver (120). The power supply unit (110) and the gate driver (120) are connected not only to the battery power supply line that receives the battery power (210), but also to the ignition power supply line that receives the ignition power (220). In order to receive the battery power (210) during normal operation and the ignition power (220) during an emergency, the supply lines of the battery power (210) and the ignition power (220) are connected to each other and connected to the power supply unit (110) and the gate driver (120).

It may include a diode connecting the ignition power (220) and the power supply unit (110) and the gate driver (120). When the battery power supply line and the ignition power supply line are connected, a diode (160) may be formed in the ignition power supply line. Since the current flowing in the battery power supply line is large during normal operation, the current of the battery power supply line may flow to the ignition power supply line due to the connection of the ignition power supply line and the battery power supply line, and in this case, other components supplied with the ignition power (220) may be affected. Therefore, the diode (160) serves to prevent reverse connection so that the current flowing in the battery power supply line does not flow to the ignition power supply line. In addition, during normal operation, only the battery power (210) should be supplied to the power supply unit (110) and the gate driver (120), but by forming the diode (160), when the current flowing in the battery power supply line is large, the input from the ignition power supply line can be blocked by the diode, so that only the battery power (210) can be supplied to the power supply unit (110) and the gate driver (120). In an emergency where the battery power (210) cannot be used, since there is no current flowing in the battery power supply line or a current smaller than the current flowing in the ignition power supply line flows, in this case, the current can be supplied from the ignition power supply line. By using the diode (160), the battery power (210) and the ignition power (220) can be stably provided to the power supply unit (110) and the gate driver (120) without any other configuration.

At this time, multiple diodes can be used. By connecting multiple diodes in series, the stability of preventing reverse connection can be increased, enabling stable operation, compared to using a single diode.

The control unit (130) can control the gate driver (120) so that the motor driving unit (140) operates in the motor braking mode when there is a problem with the battery power supply. When there is a problem with the battery power supply, that is, in an emergency, there may also be a problem with the battery power supply to the motor driving unit (140), and in this case, it means a situation in which it is difficult to operate the motor (230) normally. In a situation in which it is difficult to supply the battery power (210), it is difficult to drive the motor (230) using the battery power (210), and if you wait until the motor (230) stops by itself, the motor (230) will not stop stably, which may cause a safety problem. Therefore, the control unit (130) can control the gate driver (120) so that the motor (230) can stop safely and stably, thereby allowing the motor driving unit (140) to operate in the motor braking mode. Since the motor drive unit (140) operates in motor braking mode, the motor (230) does not operate without control even in an emergency, and can be stably stopped by the motor braking mode.

When an abnormality occurs in the supply of battery power (210) and the motor (230) needs to be stably stopped, the control unit (130) can control the gate driver (120) so that a short circuit is formed in the upper switch or the lower switch forming the motor driving unit (140). When a short circuit is formed in the upper switch or the lower switch, the motor driving unit (140) can operate in the motor braking mode to stop the operation of the motor (230). The short circuit in the upper switch can be formed by turning on all the upper switches of the motor driving unit (140) and turning off all the lower switches, and the short circuit in the lower switch can be formed by turning on all the lower switches of the motor driving unit (140) and turning off all the upper switches. Accordingly, the control unit (130) can control the gate driver (120) to turn on only the upper switches or lower switches forming the motor drive unit (140) so that the motor drive unit (140) can operate in motor braking mode.

If an abnormality occurs in the supply of battery power (210), the control unit (130) can pull up the upper switch forming the motor driving unit (140) to the first voltage and turn off the lower switch, or pull down the lower switch forming the motor driving unit (140) to the ground voltage and turn off the upper switch. Among the connection lines transmitting a signal from the control unit (130) to the gate driver (120), each connection line for the upper switch can be connected to the first voltage output line supplied from the power supply unit (110), and each connection line for the lower switch can be connected to ground (GND). Here, the first voltage is a voltage that is distinct from the ground, and can be, for example, 3.3 V. Pull-up means forcibly raising to a predetermined value, and pull-down means forcibly lowering to a predetermined value. In an emergency, the control unit (130) can pull up all the upper switches to the first voltage and turn off all the lower switches to form a short circuit in the upper switches, thereby stopping the motor (230). Alternatively, in an emergency, the control unit (130) can pull down all the lower switches to ground and turn off all the upper switches to form a short circuit in the lower switches, thereby stopping the motor (230).

The control unit (130) can control the pulse width modulation signal output from the gate driver (120) when an abnormality occurs in the supply of battery power (210). The gate driver (120) operates the switch of the motor driving unit (140) through a pulse width modulation (PWM) signal. During normal operation, the motor driving unit (140) transmits a signal by modulating the pulse width of each switch of the motor driving unit (140) so that the motor driving unit (140) can supply three-phase power to the motor (230). However, in an emergency, in order to stop the motor (230), the switches of the motor driving unit (140) must be operated differently from during normal operation, and for this purpose, the control unit (130) can control the pulse width modulation signal output from the gate driver (120). For example, as described above, the pulse width modulation signal of the gate driver (120) can be controlled to turn on both the upper switch and the lower switch so that the motor driving unit (140) operates in motor braking mode.

The control unit (130) can transmit an alarm to the upper controller or vehicle system when an abnormality occurs in the supply of battery power (210). In an emergency, the control unit (130) can transmit information about the occurrence of an emergency to the upper controller or vehicle system at the same time as or after performing an operation to stop the motor (230). Information about stopping the motor (230) can also be transmitted together. By transmitting information about an abnormality in the supply of battery power (210) to the upper controller or vehicle system, the upper controller can perform an operation accordingly, and can also help identify the cause of the failure thereafter.

The battery power detection unit (150) can detect the battery power (210). The battery power detection unit (150) detects the battery power and transmits the battery power detection information to the control unit (130), thereby allowing the control unit (130) to monitor the battery power (210). The battery power detection unit (150) can be configured in various ways using a voltage distribution circuit, a transistor, etc.

In the event of a problem in the supply of battery power, the power supply unit (110) and the gate driver (120) receive power from the ignition power supply (220) to perform operations, but must perform an operation to stop the motor (230). In order to respond quickly in an emergency, the control unit (130) can quickly determine that there is a problem in the supply of battery power (210) based on a signal received from the battery power detection unit (150), and can quickly perform an operation to stably stop the motor (230). In addition, since it can accurately determine that there is a problem in the battery power (210), the corresponding information can be provided to the upper controller or the vehicle system to enable monitoring and identification of the cause of the failure.

The power supply unit (110) and the gate driver (120) can receive the ignition power (220) for a predetermined period of time when an abnormality occurs in the supply of the battery power (210). The power supply unit (110) and the gate driver (120) can operate by receiving the ignition power (220) in an emergency, but the ignition power (220) is supplied as an emergency power source, and the ignition power (220) is also provided to other devices, so it may be difficult to continuously use the ignition power (220). Therefore, the ignition power (220) is supplied only until the motor (230) is stably stopped, and the supply of the ignition power (220) can be cut off after a predetermined period of time has elapsed. The time for which the ignition power (220) is supplied may be the time required to brake the motor (230) or may be preset by the user. Alternatively, the ignition power (220) may be input until the motor (230) stops or the speed of the motor (230) becomes lower than a predetermined speed.

A motor driving device according to an embodiment of the present invention can be implemented as shown in FIG. 3. Battery power can be input to KL30 (210), and ground can be connected to KL31 (240). Ignition power can be input to KL15 (220). Battery power (210) is input through a reverse protection circuit, branched from the B+ terminal, and supplied to a motor driving unit (140) configured as a B6 bridge, a power supply unit (110) which is a PMIC, and a gate driver (120). When battery power, i.e., power of KL30, is not supplied, in order to supply power from the ignition power, i.e., the KL15 line, the B+ (KL30) line and the KL15 line are connected to supply power to the power supply unit (110) and the gate driver (120). The power supply unit (110) and the gate driver (120) receive battery power (210) input from the B+ terminal during normal operation, and receive ignition power (220) when an abnormality occurs in the supply of the battery power (210). When the ignition power is not supplied during normal operation, a diode (160) is formed to prevent reverse voltage and current from flowing. The power supply unit (110) provides power by converting the voltage to 3.3 V to be suitable for the control unit (130), which is an MCU. The control unit (130) controls the gate driver (120) so that the gate driver (120) transmits a signal to operate the switches of the motor driving unit (140). At this time, the control unit (130) can pull up the upper switch to 3.3 V and pull down the lower switch to ground. Each signal line can be connected to a 3.3 V output line output from a power supply unit (110) or connected to ground. The gate driver (120) applies power supplied according to a control signal of the control unit (130) to each switch of the corresponding motor driving unit (140) to operate the motor driving unit (140), and the motor driving unit (140) accordingly applies three-phase power to the motor (230) to drive the motor (230). The battery power detection unit (150), which is a KL30 measurement circuit, detects battery power at the B+ terminal and transmits it to the control unit (130). The control unit (130) detects battery power and controls the gate driver (120) so that the switch of the motor driving unit (140) operates in motor braking mode in order to stably stop the motor (230) in an emergency. Through this, the motor driving device can be kept from stopping operation even when the battery power supply is cut off, the control unit (130) can recognize a fault situation, and the gate driver (120) can be made to float the PWM topography to operate the high side or low side break mode for 50 ms or more to stably brake the motor (230). Specifically, the three MOSFET switches on the upper or lower side of the motor driving unit can be turned on and the MOSFET switch on the opposite side can be turned off to operate the B6 bridge as a short circuit to perform the braking mode.

Unlike Fig. 3, as shown in Fig. 4, the PMIC (11) and Gate Driver IC (12) receive power only through the battery power lines KL30 (21) and KL31 (24). The B6 bridge (14) is connected to the KL30 line and drives the motor (23). The ignition line KL15 (22) is used only as a signal to enable the PMIC (11), and when the KL15 (22) signal is turned on, the PMIC (11) supplies power to the internal components of the ECU, so that the MCU (13) is turned on, and other components operate according to the control of the MCU (13). When the supply of KL30(B+) is interrupted due to external or internal factors, the PMIC(11) and Gate Driver IC(12) do not operate and are suddenly shut down, and the motor(23) cannot be controlled while it is in operation, so the motor(23) cannot be stably braked. In addition, information about the corresponding fault situation cannot be transmitted to the upper controller.

As described above, in order for the motor driving unit (140) to operate in the motor braking mode, a short circuit must be formed in the upper switch or the lower switch of the motor driving unit (140). The control unit (130) can control the gate driver (120) so that the motor driving unit (140) operates as in FIG. 5 or FIG. 6. FIG. 5 shows an example in which a short circuit is formed in the upper switch of the motor driving unit (140). All upper switches (141) are turned on, all lower switches (142) are turned off, and a current path to the motor (230) is formed by the upper switches to form a short circuit, through which the motor (230) can be braked. Figure 6 shows an example in which a short circuit is formed in the lower switch of the motor drive unit (140). All upper switches (141) are turned off, all lower switches (142) are turned on, a current path to the motor (230) is formed by the lower switches, and a short circuit is formed, through which the motor (230) can be braked.

Figure 7 is a waveform of a situation where the battery power supply is cut off, and power is supplied using the ignition power after the B+ power is turned off. It can be confirmed that the ignition current increases and power is supplied after the battery power is cut off.

Figure 8 shows a low side break operation that forms a short circuit in the lower switch. When the battery power is cut off (fuse break), it can be confirmed that the upper MOSFET switches H1, H2, and H3 are turned off after about 6 ms, and the lower MOSFET switches L1, L2, and L3 are turned on to form a short circuit in the lower switch and perform a break operation.

When the battery power (KL 30) power supply is cut off, the control unit (MCU) recognizes the fault situation after monitoring the battery power voltage through the battery power detection unit, and forms a short circuit in the motor drive unit (B6 bridge) by floating the PWM signal output to the gate driver and pulling up or pulling down the PWM signal, thereby operating in motor braking mode and transmitting the situation to the vehicle system or upper controller.

Fig. 9 is a flow chart of a motor emergency braking method according to one embodiment of the present invention, and Fig. 10 is a flow chart of a motor emergency braking method according to another embodiment of the present invention. Detailed descriptions of each step of Figs. 9 and 10 correspond to the detailed descriptions of the motor driving devices of Figs. 1 to 8, and thus, any duplicate descriptions will be omitted below.

At step S11, an abnormality in the supply of battery power is detected, and if an abnormality occurs in the supply of the battery power, ignition power is supplied at step S12 to operate. At step S13, the control unit controls the gate driver so that a plurality of switches forming the motor driving unit operate in the motor braking mode, and at step S14, the gate driver operates the switches of the motor driving unit in the motor braking mode. At this time, a pulse width modulation signal output from the gate driver can be controlled. Through this, a short circuit is formed in the upper switch or the lower switch of the motor driving unit at step S15 to brake the motor.

If there is an abnormality in the supply of the above battery power, the upper switch forming the motor drive unit can be pulled up to the first voltage and the lower switch can be turned off, or the lower switch can be pulled down to the ground voltage and the upper switch can be turned off to operate the switch of the motor drive unit in the motor braking mode.

When the motor stops, information that there is a problem with the supply of battery power at step S21 can be transmitted to the upper controller or vehicle system.

Meanwhile, embodiments of the present invention can be implemented as computer-readable codes on a computer-readable recording medium. The computer-readable recording medium includes all types of recording devices that store data that can be read by a computer system.

Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and further, the computer-readable recording media can be distributed over network-connected computer systems, so that computer-readable code can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the technical field to which the present invention belongs.

Although the present invention has been described with specific details such as specific components and limited examples and drawings, these have been provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those with common knowledge in the field to which the present invention pertains can make various modifications and variations from this description.

Therefore, the idea of the present invention should not be limited to the described embodiments, and all things that are equivalent or equivalent to the claims described below as well as the claims are included in the scope of the idea of the present invention.

100: Motor drive device
110: Power supply
120: Gate Driver
130: Control Unit
140: Motor drive unit
141: Top switch
142: Lower switch
150: Battery power detection unit
160: Diode
210: Battery Power
220: Ignition power
230: Motor

Claims (17)

A power supply unit that supplies power to the control unit by receiving battery power or ignition power;
A gate driver that operates a switch of a motor drive unit by receiving the battery power or the ignition power;
A control unit that receives power from the power supply unit and controls the gate driver; and
It includes a motor driving unit that drives a motor by receiving power from the above battery,
The above power supply unit and the gate driver receive the ignition power when there is an abnormality in the supply of the battery power,
The above control unit,
A motor driving device characterized in that the gate driver is controlled so that the motor driving unit operates in motor braking mode when an abnormality occurs in the supply of the battery power. In the first paragraph,
A motor driving device, characterized in that the supply line of the battery power and the supply line of the ignition power are connected to the power supply unit and the gate driver. delete In the first paragraph,
The above control unit,
A motor driving device characterized in that, when an abnormality occurs in the supply of the battery power, the gate driver is controlled so that a short circuit is formed in the upper switch or the lower switch forming the motor driving unit. In the first paragraph,
The above control unit,
A motor driving device characterized in that, when an abnormality occurs in the supply of the above battery power, the upper switch forming the motor driving unit is pulled up to the first voltage and the lower switch is turned off. In the first paragraph,
The above control unit,
A motor driving device characterized in that, when an abnormality occurs in the supply of the above battery power, the lower switch forming the motor driving unit is pulled down to ground voltage and the upper switch is turned off. In the first paragraph,
The above control unit,
A motor driving device characterized in that, when an abnormality occurs in the supply of the above battery power, the pulse width modulation signal output from the gate driver is controlled. In the first paragraph,
The above control unit,
A motor drive device characterized in that it transmits an alarm to a higher controller or vehicle system when an abnormality occurs in the supply of the above battery power. In the first paragraph,
The above motor driving unit,
It is formed by three upper switches and three lower switches,
A motor driving device characterized in that the upper switch and the lower switch are complementarily conductive. In the first paragraph,
A motor driving device including a battery power detection unit for detecting the battery power. In the first paragraph,
The above power supply unit and the above gate driver,
A motor driving device characterized in that the ignition power is input for a predetermined period of time when an abnormality occurs in the supply of the battery power. In the first paragraph,
A motor driving device comprising a diode connecting the ignition power source and the power supply unit and the gate driver. In the first paragraph,
A motor drive device characterized in that the above motor drive device drives a motor that operates the gear of the vehicle. Step for detecting whether there is an abnormality in the supply of battery power;
A step for operating by supplying ignition power when there is a problem with the supply of the above battery power;
A step of controlling a gate driver so that a plurality of switches forming a motor driving unit operate in a motor braking mode;
The step of the gate driver operating the switch of the motor driving unit in the motor braking mode; and
A motor emergency braking method comprising a step of forming a short circuit in an upper switch or a lower switch of the motor driving unit to brake the motor. In Article 14,
The step of controlling the above gate driver is:
A motor emergency braking method characterized by controlling a pulse width modulation signal output from the above gate driver. In Article 14,
The step of operating the switch of the above motor driving unit in motor braking mode is:
A motor emergency braking method characterized in that, when an abnormality occurs in the supply of the battery power, the upper switch forming the motor driving unit is pulled up to the first voltage and the lower switch is turned off, or the lower switch is pulled down to the ground voltage and the upper switch is turned off. In Article 14,
A motor emergency braking method comprising a step of transmitting information that an abnormality has occurred in the supply of the above battery power to a higher controller or vehicle system.

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