JP2007330050A - Motor drive device and failure notification method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor drive device and a failure notification method therefor, notifying a driving state of a motor to the outside. <P>SOLUTION: This motor drive device includes: a determination section for determining whether to determine failure of the motor by changing a driving frequency of the motor, based on a control signal for controlling the motor; a driving frequency control unit for controlling the driving frequency of the motor, so as to be within an audible range when determined to determine the failure of the motor by changing the driving frequency of the motor; and a motor driving unit for driving the motor at a driving frequency set by the driving frequency control unit. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a motor drive device mounted on an engine such as a vehicle, and an abnormality notification method for the motor drive device.

  An actuator mounted on an engine such as a vehicle is connected to another ECU (electronic control unit) via, for example, a CAN (Control Area Network) communication system. The other ECU transmits a control signal including an instruction value such as a rotation angle of the motor to the driver. The CPU mounted on the driver drives the motor according to the control signal transmitted from the other ECU, and when the motor is normally driven, for example, the sensor value such as the rotation angle of the motor is transmitted to the other ECU. If the motor is not normally driven, information indicating that the motor has failed is transmitted to another ECU. This transmission is performed via the CAN communication system.

As an example of a motor abnormality stop device, it stores the number of pulses for motor abnormality determination set for the rotation speed detection pulse generated during motor rotation, and the number of pulses set after the reference time determined according to the motor start signal output time A motor abnormality stop device is disclosed that stores a maximum allowable time required to detect the pulse of the motor and determines that the motor rotation is abnormal when a pulse having a set number of pulses is not detected within the maximum allowable time (for example, , See Patent Document 1).
JP 2001-145380 A

  However, the background art described above has the following problems.

  In an actuator in which the motor driver and the motor are not integrated, a motor abnormality can be detected by directly inspecting the driver output.

  However, a motor output integrated actuator in which a CPU, a motor, and a driver for driving the motor are integrated cannot directly check the driver output. For this reason, when an output signal such as a sensor value or information indicating that the motor has failed is not transmitted to another ECU, there is a problem that it is not possible to specify whether the driver side, that is, a CPU abnormality or a CAN communication system abnormality. is there.

  When the CPU is abnormal, the power supply IC is abnormal and the CPU itself is abnormal. Further, in the case of an abnormality in the CAN communication system, there is an abnormality in the CAN communication driver, communication line, or tool CAN driver.

  Further, in the motor abnormal stop device described in Patent Document 1, it is determined whether or not the motor rotation is abnormal based on the detected number of pulses. However, the sensor itself that detects the number of pulses fails. The correct number of pulses cannot be detected.

  SUMMARY An advantage of some aspects of the invention is that it provides a motor drive device and a motor drive device abnormality notification method that can notify a motor drive state to the outside.

  In order to solve the above-described problem, the motor driving device of the present invention determines whether or not to perform abnormality determination of the motor by changing the driving frequency of the motor based on a control signal for controlling the motor. A determination means, a drive frequency control means for controlling the drive frequency of the motor to be in an audible region when it is determined to determine abnormality of the motor by changing the drive frequency of the motor, and the drive frequency control means One of the features is that it comprises a motor driving means for driving the motor at the driving frequency set by the above.

  By configuring in this way, even if a control signal is not received based on the presence or absence of reception of a control signal for controlling the motor, for example, the control signal, by changing the motor driving frequency, The driving state of the motor can be notified to the outside by the driving sound.

  Further, in the motor drive device, the determination means determines that the motor abnormality is determined by changing the drive frequency of the motor when the control signal from the electronic control device is not input every predetermined period. It may be.

  With this configuration, for example, the electronic control device and the motor drive device are connected to each other by an in-vehicle multiplex communication system, but a control signal for controlling the motor is not input every predetermined period. In this case, it can be determined that there is an abnormality in the in-vehicle multiple communication system or the communication module. In such a case, by changing the driving frequency of the motor, the driving state of the motor can be notified to the outside by the driving sound of the motor.

  In the motor driving device, a communication means for receiving a control signal transmitted from the electronic control device, a driving frequency detecting means for detecting a driving frequency of the motor, and a driving frequency of an audible region in the driving frequency detecting means. And an abnormality notification means for notifying that the communication means is abnormal.

  By comprising in this way, abnormality of a communication means can be notified outside. If a control signal for controlling the motor is not input every predetermined cycle, it can be determined that the in-vehicle multiplex communication system or the communication module is abnormal. In addition, when the driving frequency in the audible region is detected, it can be seen that there is no abnormality in the motor. In such a case, an abnormality of the communication means can be notified to the outside.

  In the motor driving apparatus, the abnormality notification unit may notify that the motor is abnormal when the driving frequency detection unit does not detect the driving frequency of the audible region.

  With this configuration, it is possible to notify the outside of the motor abnormality. If a control signal for controlling the motor is not input every predetermined cycle, it can be determined that the in-vehicle multiplex communication system or the communication module is abnormal. Further, when the driving frequency of the audible region is not detected, it can be understood that there is an abnormality in the motor. In such a case, the abnormality of the motor can be notified to the outside.

  The abnormality notification method for a motor drive device according to the present invention also includes a determination for determining whether or not to perform abnormality determination for a motor by changing the drive frequency of the motor based on a control signal for controlling the motor. And a driving frequency control step for controlling the motor driving frequency to be in an audible region when it is determined in the determining step that the abnormality of the motor is determined by changing the driving frequency of the motor, and the driving One feature is that it has a motor driving step for driving the motor at the driving frequency set by the frequency control step.

  In this way, even if no control signal is received based on the presence or absence of a control signal for controlling the motor, for example, the control signal, the motor drive state is externally indicated by the motor drive sound. You can be notified.

  In the motor drive device abnormality notification method, the determination step performs motor abnormality determination by changing the motor drive frequency when the control signal from the electronic control device is not input every predetermined period. You may make it judge.

  By doing so, for example, the electronic control device and the motor drive device are communicably connected to each other by an in-vehicle multiplex communication system, but a control signal for controlling the motor is not input every predetermined period. In this case, it can be determined that there is an abnormality in the in-vehicle multiple communication system or the communication module. In such a case, the driving state of the motor can be notified to the outside by the driving sound of the motor.

  Also, in the abnormality notification method for the motor drive device, when the drive frequency detection step for detecting the drive frequency of the motor and the drive frequency in the audible region are detected in the drive frequency detection step, the electronic control device transmits An abnormality notification step for notifying that the communication means that receives the control signal is abnormal.

  In this way, it is possible to notify the outside of the communication means of abnormality. If a control signal for controlling the motor is not input every predetermined cycle, it can be determined that the in-vehicle multiplex communication system or the communication module is abnormal. In addition, when the driving frequency in the audible region is detected, it can be seen that there is no abnormality in the motor. In such a case, an abnormality of the communication means can be notified to the outside.

  Further, in the abnormality notification method for the motor drive device, the abnormality notification step may notify that the motor is abnormal when the drive frequency in the audible region is not detected in the drive frequency detection step. .

  By doing so, it is possible to notify the outside of the motor abnormality. If a control signal for controlling the motor is not input every predetermined cycle, it can be determined that the in-vehicle multiplex communication system or the communication module is abnormal. Further, when the driving frequency of the audible region is not detected, it can be understood that there is an abnormality in the motor. In such a case, the abnormality of the motor can be notified to the outside.

  According to the embodiment of the present invention, it is possible to realize a motor drive device and a motor drive device abnormality notification method capable of notifying the outside of the motor drive state.

Next, the best mode for carrying out the present invention will be described based on the following embodiments with reference to the drawings.
In all the drawings for explaining the embodiments, the same reference numerals are used for those having the same function, and repeated explanation is omitted.

  A motor driver integrated actuator (hereinafter referred to as an actuator) according to an embodiment of the present invention will be described with reference to FIG. Here, the motor driver integrated actuator is an actuator in which a CPU, a motor, and a driver for driving the motor are integrated.

  The actuator 100 according to the present embodiment includes a motor 140 and a driver 120 that drives the motor 140. The driver 120 is a driver that can vary the driving frequency, and is connected to a battery. The driver 120 is connected to another ECU (electronic control unit) 300 via an in-vehicle multiple communication system 200, for example, a CAN (Control Area Network) communication system.

  Next, the function of the actuator 100 according to the present embodiment will be described with reference to FIG.

  The actuator 100 includes a motor 140 and a driver 120 that drives the motor 140. The driver 120 includes a communication unit 102 connected to the in-vehicle multiplex communication system 200, a motor driving unit 106 that drives the motor 140, a driving frequency changing unit 108 that changes the driving frequency of the motor driving unit 106, and driving of the motor 140. A sensor 110 that detects a state, a communication unit 102, a motor drive unit 106, a drive frequency change unit 108, and a control unit 104 that controls the sensor 110 are provided.

  The communication unit 102 includes, for example, a communication module, and communicates with other ECUs 300 via an in-vehicle multiplex system 200, for example, a CAN (Control Area Network) communication system. For example, the other ECU 300 transmits a control signal including an instruction value such as the amount of rotation of the motor to the driver 120. When the communication unit 102 receives a control signal from another ECU 300, the communication unit 102 inputs the received control signal to the control unit 104, and the control unit 104 controls the motor driving unit 106 according to the rotation amount of the motor included in the control signal. To do. The motor driving unit 106 drives the motor 140 according to the control by the control unit 104. Information indicating the driving state of the motor 140, for example, a sensor value such as the number of rotations is detected by the sensor 110, and the communication unit 102 transmits information indicating the driving state to the ECU 300 via the in-vehicle multiplex system 200. ECU 300 displays the driving state of motor 140 based on the notified information indicating the driving state. By doing so, it is possible to notify the passenger of the driving state of the motor 140.

  The control unit 104 is configured by a CPU, for example, and controls the motor driving unit 106 in accordance with a control signal transmitted from the ECU 300. If no control signal is input from ECU 300 at a predetermined cycle, control unit 104 determines that communication unit 102 and / or in-vehicle multiplex system 200 is out of order, and issues a command to motor drive unit 106 to drive the motor. While inputting, it instructs the drive frequency changing unit 108 to change the drive frequency. For example, the elapsed time after the driver 120 is powered on is measured, and if no control signal is input from the ECU 300 even after the predetermined time has elapsed, the control unit 104 may be the communication unit 102 and / or the in-vehicle multiplex system. It is determined that there are 200 failures. Further, even when the motor 140 is being driven, if there is no control signal input from the ECU 300 at a predetermined cycle, the control unit 104 determines that the communication unit 102 and / or the in-vehicle multiplex system 200 is out of order.

  Further, the control unit 104 controls the communication unit 102 and / or the in-vehicle multiplex system 200, for example, an abnormality in the CAN communication system, the communication unit 102 or / and the in-vehicle multiplex system 200, according to the type of the diagnosis that is mounted in advance. It is also possible to identify an abnormal part such as an abnormality in a storage unit in which the above information is stored, for example, an EEPROM. In this case, the control unit 104 instructs the drive frequency changing unit 108 to change the drive frequency so as to output a different drive sound depending on the abnormal part.

  The drive frequency changing unit 108 causes the control unit 104 to input a command for changing the drive frequency to the motor drive unit 106 in accordance with the drive frequency change command for changing the drive frequency. For example, the drive frequency changing unit 108 changes the motor drive unit 106 so that the motor drive unit 106 changes to a drive frequency at which sound in the audible region is output, for example, a drive frequency in the range of 20 Hz to 20 kHz, according to control by the control unit 104. 106 is instructed. For example, when the motor 140 is driven, the driving frequency changing unit 106 instructs to change the driving frequency to 261.6 Hz when the “do” sound is output, and the “le” sound is output. In order to exit, it is instructed to change to a drive frequency of 293.7 Hz.

  In addition, the control unit 104 controls the communication unit 102 and / or the in-vehicle multiplex system 200, for example, an abnormality in the CAN communication system, the communication unit 102 or / and the in-vehicle multiplex system 200, according to the type of diagnosis installed in advance. When an abnormal location such as an abnormality in the EEPROM is identified, the drive frequency changing unit 108 determines the drive sound that differs depending on the abnormal location according to a command from the control unit 104. Command to change the drive frequency to output. For example, the drive frequency changing unit 108 changes the drive frequency so that the drive sound becomes “do” when there is an abnormality in the communication unit 102 and / or the in-vehicle multiplex system 200, for example, the CAN communication system. When the command is issued and the communication unit 102 or / and the storage unit in which information for control with the in-vehicle multiplex system 200 is stored, for example, an abnormality in the EEPROM, the drive sound is set to “Dreed” Command to change drive frequency.

  The motor driving unit 106 drives the motor 140 in accordance with a command from the control unit 104. The motor driving unit 106 drives the motor 140 so that the driving frequency input by the driving frequency changing unit 110 is obtained. For example, the motor drive unit 106 is driven by changing the drive frequency to the motor coil. As a result, the motor 140 is driven at a driving frequency in the audible region, and sound is output.

  By doing so, it is possible to determine whether the communication unit 102 and / or the in-vehicle multiplex system 200 is malfunctioning or the control unit 104 is malfunctioning when control information from the ECU 300 is not input in a predetermined cycle. . When communication unit 102 and / or in-vehicle multiplex system 200 is out of order, motor 140 is driven at a driving frequency in the audible range. For this reason, the driving sound can be heard directly. The motor 140 is normally driven at a driving frequency in a non-audible region, that is, a driving frequency other than 20 Hz-20 kHz.

  That is, when the rotation sound of the motor 140 is heard at a predetermined cycle, it can be determined that the in-vehicle multiplex communication system and / or the communication unit 102, for example, the communication driver is abnormal.

  Further, when the sensor value is not returned to the ECU 300 and the rotation sound of the motor 140 cannot be heard at a predetermined cycle, it can be determined that the control unit 104 is abnormal, for example, the power supply IC is abnormal or the CPU itself is abnormal. In this case, in addition to the abnormality of the control unit 104, there may be an abnormality of the in-vehicle multiplex communication system and / or the communication unit 102.

  The sensor 110 detects the driving state of the motor 140, for example, the rotation speed, and inputs the detection result to the control unit 104.

  Next, the operation of the actuator 100 according to the present embodiment will be described with reference to FIG.

  First, the main routine will be described. The control unit 104 executes the following flow every predetermined cycle, for example, every 16 msec. Here, an abnormality in communication unit 102 and / or in-vehicle multiplex system 200 will be described as an abnormality in the CAN communication system.

  The control unit 104 determines whether or not the in-vehicle multiple communication system 200, for example, the CAN communication system is abnormal (step S302). For example, when a control signal is input from the ECU 300, it is determined that the CAN communication system is normal, and even if a predetermined time sufficient for the control signal to be input from the ECU 300 is input at a predetermined period, for example, When no control signal is input, it is determined that the CAN communication system is abnormal.

  Further, the control unit 104 determines that the CAN communication system is abnormal when the motor 140 is being driven by the driving frequency of the audible region.

  When it is determined that the CAN communication is not abnormal (step S302: NO), the control unit 104 receives an instruction value from another ECU 300 (step S304). The control unit 104 inputs the input instruction value to the motor driving unit 106. The motor driving unit 106 drives the motor 140 based on the input instruction value. In this case, the motor 140 is driven at a driving frequency in the non-audible region. The sensor 110 detects the status of the driven motor 140, for example, the rotation speed, and inputs the detection result to the control unit 104. The control unit 104 calculates a duty based on the detection value input from the sensor 100 and the instruction value input to the motor drive unit 106 (step S306). For example, the control unit 104 calculates the duty by dividing the instruction value from the detection value.

  Next, the control unit 104 outputs the calculated duty. As a result, the duty is transmitted to the other ECU 300 via the in-vehicle multiple communication system 200.

  On the other hand, when the CAN communication is abnormal (step S302: YES), the control unit 104 determines whether or not both the diagnosis sound flag and the sound completion flag are off (step S310).

  When both the diagnosis sound flag and the sound completion flag are off (step S310: YES), the motor 140 is being driven by the driving frequency in the audible region.

  The control unit 104 determines whether or not a predetermined time T has elapsed after the motor 140 is driven. In this embodiment, the case where the time T for driving the motor 140 is 1 second will be described. The drive frequency of the motor 140 is changed when an abnormality occurs in the in-vehicle multiplex communication system 200 and / or the communication unit 102, and the motor 140 may be broken. In such a state, it is not preferable to drive the motor 140 for a long time by a driving method other than the normal driving method. Therefore, there is a limit on the time for driving with the driving frequency as an audible region.

  The control unit 104 determines whether or not the timer count indicating the time since the motor 140 is driven exceeds 1 second (step S312).

  When the timer count exceeds 1 second (step S312: YES), the control unit 104 turns off the diagnosis sound flag and turns on the sound completion flag (step S314). As a result, the driving of the motor 140 at the driving frequency in the audible region is finished.

  On the other hand, when the timer count is 1 second or less (step S312: NO), the processing ends as it is.

  In step S310, if at least one of the diagnosis sound flag and the sound completion flag is not off (step S310: NO), the control unit 104 turns on the diagnosis sound flag (step S316).

  Next, the control unit 104 instructs the motor driving unit 106 to set the duty to a predetermined value, for example, 100% (step S318).

  Next, the control unit 104 commands the drive frequency changing unit 108 to set the drive frequency in the audible region (step S320).

  As a result, the motor driving unit 106 drives the motor 140 at a driving frequency in the audible region designated by the driving frequency changing unit 108.

  Next, the control unit 104 starts a timer count (step S322).

  In this way, it is possible to notify the outside, for example, a passenger, that an abnormality has occurred in the in-vehicle multiplex communication system 200 and / or the communication unit 102 at a predetermined period, and also in the in-vehicle multiplex communication system 200 and / or communication. When an abnormality occurs in the unit 102, it can be notified that the control unit 104 is operating normally.

  The control unit 104 may control the motor driving unit 106 to change the rotation direction of the motor 140 at a predetermined cycle.

  For example, the control unit 104 performs the following PWM (Pulse Width Modulation) interrupt at a predetermined cycle, for example, every 500 μs. This PWM interrupt will be described with reference to FIG.

  The control unit 104 determines whether or not the diagnosis sound flag is on (step S402).

  When the diagnosis sound flag is not on (step S402: NO), the control unit 104 outputs the duty calculated in step S306 described above as the duty (step S404).

  On the other hand, when the diagnosis sound flag is on (step S402: YES), the control unit 104 sets a value obtained by multiplying the current duty (duty_old) by minus 1 as a new duty. That is, Duty = duty_old × (−1) is calculated (step S406).

  Next, the duty calculated in step S406 is set as the current duty (step S408).

  By doing in this way, the motor drive part 106 controls the motor 140 according to the duty shown in FIG. For example, the motor driving unit 106 controls the motor 140 to rotate forward when + 100%, and controls it to rotate in the reverse direction opposite to the normal rotation when −100%. This control is performed for a predetermined time T that is driven at a driving frequency in the audible region that is performed in order to detect an abnormality in the motor 140 and the control unit 104. That is, the rotation direction of the motor rotates forward and backward at a predetermined time period within the time T driven at the driving frequency of the audible region.

  By doing in this way, rotation of the motor 140 at the time of abnormality detection can be suppressed. Since the motor 140 rotates when a current is passed in only one direction, the drive output is set to + 100% and −100%.

  Next, an actuator according to a second embodiment of the present invention will be described with reference to FIG.

  The configuration of the actuator according to the present embodiment is based on the drive frequency detection unit 112 that detects the drive frequency of the motor 140 in the configuration of the actuator described with reference to FIG. A communication unit 102 and / or a notification unit 114 that notifies an abnormality of the in-vehicle multiplex communication system 200.

  The drive frequency detection unit 112 is configured by, for example, a frequency analyzer, detects the drive frequency of the motor 140, and notifies the control unit 104 of the drive frequency.

  When the control unit 104 instructs the drive frequency changing unit 108 to change to the drive frequency in the audible region, the control unit 104 instructs the drive frequency detection unit 112 to detect the drive frequency.

  The drive frequency detection unit 112 detects the drive frequency of the motor 140 in accordance with a command from the control unit 104 and notifies the control unit 104 of the detection.

  Based on the information indicating the driving frequency of the motor 140 notified by the driving frequency detection unit 112, the control unit 104 determines whether or not the notified driving frequency is an audible region.

  When the notified frequency region is not an audible region, the control unit 104 determines that the motor 140 is abnormal and instructs the notification unit 114 to notify that the motor 140 is abnormal. The notification unit 114 notifies the outside that an abnormality has occurred in the motor 140 by, for example, an alarm. In addition, the notification unit 114 may notify the outside that an abnormality has occurred in the in-vehicle multiplex communication system 200 and / or the communication unit 102.

  By doing so, it is possible to notify the outside of the motor abnormality. The control unit 104 can determine that there is an abnormality in the in-vehicle multiplex communication system 200 and / or the communication unit 102 when a control signal for controlling the motor is not input every predetermined cycle. In addition, when the control unit 104 issues a command to drive the motor 140 at the audible region driving frequency, if the audible region driving frequency is not detected, it is found that the motor 140 is abnormal. In such a case, the abnormality of the motor 140 can be notified to the outside.

  When the notified frequency region is an audible region, the control unit 104 determines that the communication unit 102 and / or the in-vehicle multiplex communication system 200 is abnormal, and notifies the notification unit 114 of the communication unit 102 and / or It is instructed to notify that the in-vehicle multiple communication system 200 is abnormal. The notification unit 114 notifies the outside that an abnormality has occurred in the communication unit 102 and / or the in-vehicle multiplex communication system 200, for example, by an alarm.

  By doing in this way, the abnormality of the communication part 102 and / or the vehicle-mounted multiple communication system 200 can be notified outside. When a control signal for controlling the motor is not input every predetermined cycle, it can be determined that the in-vehicle multiplex communication system 200 and / or the communication unit 102 is abnormal. In addition, when the control unit 104 issues a command to drive the motor 140 at the audible region driving frequency and the audible region driving frequency is detected, it can be seen that the motor 140 is normal. In such a case, an abnormality of the in-vehicle multiplex communication system 200 and / or the communication unit 102 can be notified to the outside.

  By providing the drive frequency detection unit 112 and the notification unit 114, the motor 140 or the communication unit 102 and / or the in-vehicle multiplex communication system 200 may be abnormal even in a situation where the surroundings are noisy and the drive sound of the motor 140 cannot be heard. Can be notified to the outside.

  Next, the operation of the actuator 100 according to the present embodiment will be described with reference to FIG.

  The control unit 104 determines whether or not CAN communication is abnormal (step S702).

  If the CAN communication is not abnormal (step S702: NO), the process returns to step S702.

  If CAN communication is abnormal (step S702: YES), the control unit 104 instructs the drive frequency detection unit 112 to detect the drive frequency (step S704). The drive frequency detection unit 112 detects the drive frequency of the motor 140 in accordance with an instruction from the control unit 104 and notifies the control unit 104 of the detected drive frequency.

  Next, the control unit 104 determines whether or not the notified drive frequency is an audible region (step S706).

  When the notified drive frequency is an audible region (step S706: YES), the control unit 104 notifies the notification unit 114 that the in-vehicle multiplex communication system 200 and / or the communication unit 102 is abnormal. To order. As a result, the notification unit 114 notifies the outside that the in-vehicle multiple communication system 200 and / or the communication unit 102 is abnormal.

  On the other hand, when the notified drive frequency is not in the audible range (step S706: NO), the control unit 104 instructs the notification unit 114 to notify that the motor 140 is abnormal. As a result, the notification unit 114 notifies the outside that the motor 140 is abnormal. In addition, the notification unit 114 may notify the outside that an abnormality has occurred in the in-vehicle multiplex communication system 200 and / or the communication unit 102.

  In the above-described embodiments, the motor driver integrated actuator in which the CPU, the motor, and the driver that drives the motor are integrated has been described. However, the present invention can also be applied to an actuator in which the motor driver and the motor are not integrated. it can.

  Moreover, in the Example mentioned above, it can apply not only to a motor but to the apparatus with which the drive device and the inverter were comprised integrally.

  The motor drive device and the abnormality notification method for the motor drive device according to the present invention can be applied to an actuator mounted on an engine such as a vehicle.

It is a schematic diagram which shows the actuator concerning one Example of this invention. It is a partial block diagram which shows the actuator concerning one Example of this invention. It is a flowchart which shows operation | movement of the actuator concerning one Example of this invention. It is a flowchart which shows operation | movement of the actuator concerning one Example of this invention. It is explanatory drawing which shows operation | movement of the actuator concerning one Example of this invention. It is a partial block diagram which shows the actuator concerning one Example of this invention. It is a flowchart which shows operation | movement of the actuator concerning one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Actuator 102 Communication part 104 Control part 106 Motor drive part 108 Drive frequency change part 110 Sensor 112 Drive frequency detection part 114 Notification part 120 Driver 140 Motor 200 In-vehicle multiple communication system 300 ECU (electronic control unit)

Claims (8)

Determining means for determining whether or not to perform abnormality determination of the motor by changing the driving frequency of the motor based on a control signal for controlling the motor;
A drive frequency control means for controlling the motor drive frequency to be in an audible range when it is determined to determine abnormality of the motor by changing the drive frequency of the motor;
A motor drive device comprising: motor drive means for driving a motor at a drive frequency set by the drive frequency control means. The motor drive device according to claim 1,
The motor drive apparatus according to claim 1, wherein the determination means determines that a motor abnormality is determined by changing a drive frequency of the motor when the control signal from the electronic control apparatus is not input every predetermined period. In the motor drive device according to claim 2,
Communication means for receiving a control signal transmitted from the electronic control device;
Drive frequency detection means for detecting the drive frequency of the motor;
An abnormality notification means for notifying that the communication means is abnormal when the drive frequency detection means detects a drive frequency in an audible region. In the motor drive device according to claim 3,
The abnormality notification means notifies the motor abnormality when the drive frequency detection means does not detect a drive frequency in the audible region. A determination step of determining whether or not to perform abnormality determination of the motor by changing the driving frequency of the motor based on a control signal for controlling the motor;
A drive frequency control step for controlling the motor drive frequency to be in an audible region when it is determined in the determining step that the motor abnormality is determined by changing the motor drive frequency;
And a motor driving step of driving a motor at a driving frequency set by the driving frequency control step. In the abnormality notification method of the motor drive device according to claim 5,
In the motor driving apparatus, the determining step determines that a motor abnormality is determined by changing a driving frequency of the motor when the control signal from the electronic control apparatus is not input every predetermined period. Abnormal notification method. In the abnormality notification method of the motor drive device according to claim 6,
A drive frequency detection step for detecting the drive frequency of the motor;
And an abnormality notification step of notifying that the communication means that receives the control signal transmitted from the electronic control device is abnormal when the driving frequency of the audible region is detected in the driving frequency detecting step. An abnormality notification method for a motor drive device. In the motor drive device according to claim 7,
An abnormality notification method for a motor drive device, wherein the abnormality notification step notifies that the motor is abnormal when a drive frequency in an audible region is not detected in the drive frequency detection step.

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