JP2010220294A - Motor controller and motor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor controller which avoids the occurrence of such a fault that a voltage is kept applied to the terminal of a motor in case that a fault occurs at a motor voltage detecting part and that welding occurs at a relay contact in that state. <P>SOLUTION: This motor controller 1 is provided with a voltage detection failure determinator 16, which mutually monitors a motor voltage signal outputted from a motor voltage monitor 13 and a motor revolution signal outputted from the motor revolution detector 14. Then, the voltage detection failure determinator 16 determines that there is failure in a motor voltage detector (a section composed of a motor terminal voltage detecting circuit 23 and the motor voltage monitor 13) in case that a signal, which shows that there is no motor terminal voltage (a drive voltage is not applied to the motor) is outputted from the motor voltage monitor 13, in a state where a signal, which shows that the motor is rotating, is outputted from the motor revolution detector 14. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a motor control device that drives and controls a motor for automatically opening and closing an opening and closing body installed in a vehicle such as a power window and a sunroof, and a motor device including the motor control device.

  FIG. 5 is a diagram showing a configuration of a motor control device of a conventional automobile power window device. Since the configuration of the motor control device shown in FIG. 5 will be described in detail in the embodiment of the present invention, only the outline of the configuration will be described here.

  As shown in FIG. 5, the motor control device 1 is connected to an automatic operation switch 2a and a manual operation switch 2b provided in a driver's seat or the like, and drive commands input from these operation switches 2a and 2b. A DC motor (M) 4 that opens and closes the window 42 is connected. A reduction gear 41 is connected to the rotation shaft (amateur shaft Ar) of the motor (M) 4, and the motor (M) 4 is moved in the CW direction (when the load side is viewed from the drive side, the shaft rotates clockwise), or By rotating in the CCW (counterclockwise) direction, the window 42 is opened and closed through the speed reducer 41.

  The motor (M) 4 is driven by driving the relay 22 through the relay drive circuit 21 by the motor drive signal CW or the motor drive signal CCW output from the motor drive control unit 12 in the CPU 11.

  In addition, a rotation sensor 7 that rotates in conjunction with the rotation shaft is provided on the rotation shaft (an amateur shaft Ar) of the motor (M) 4. The motor rotation detection unit 14 in the CPU 11 receives the two-phase pulse signals PLSA and PLSB output from the rotation sensor 7, and based on the pulse interval of the pulse signals PLSA and PLSB and the phase order of the two pulses. The rotational speed and direction of the motor (M) 4 are determined. The motor rotation detector 14 determines the rotational position of the motor (M) 4. For example, the window open / close stop position (open / close limit position) in the power window device is determined.

  Further, in the CPU 11, a motor voltage for detecting the voltage of the arm terminals A1 and A2 of the motor (M) 4 is divided into a case of rotating in the CW direction of the motor (M) 4 and a case of rotating in the CCW direction. A monitor unit 13 is provided. The motor voltage monitor unit 13 detects that a motor drive voltage is applied to the amateur terminals A 1 and A 2 of the motor (M) 4 through the motor terminal voltage detection circuit 23. This motor voltage monitor unit 13 is used as a monitor circuit (monitoring circuit) for determining whether or not the motor (M) 4 is rotating normally in the direction commanded by the motor drive control unit 12. is there. In the following description, the combined portion of the motor terminal voltage detection circuit 23 and the motor voltage monitor unit 13 is referred to as a “motor voltage detection unit”.

  Further, the CPU 11 receives a temperature detection signal output from a temperature detection element (TH) 8 for preventing burnout mounted in the motor (M) 4 as an input, and performs motor heating for detecting the heating of the motor (M) 4. A detection unit 15 is provided. In this example, when the motor (M) 4 is overheated and the level of the temperature detection signal output from the temperature detection element (TH) 8 exceeds a predetermined threshold (temperature), it is determined that the motor is heated. Then, the drive of the motor (M) 4 is stopped.

  Incidentally, as described above, in the conventional motor control device 1a, the motor (M) 4 and the motor rotation detection unit 14 that receives the pulse signal from the rotation sensor 7 attached to the rotation shaft of the motor (M) 4 are provided. A motor drive control unit 12 that performs forward / reverse rotation in the CW and CCW directions and a motor voltage monitor unit 13 that detects the voltage of the amateur terminal of the motor (M) 4 through the motor terminal voltage detection circuit 23 are configured. .

  However, in the motor control device having the above configuration, various problems occur when the motor terminal voltage cannot be normally detected due to a failure of an element in the motor terminal voltage detection circuit 23 or a failure of the motor voltage monitor unit 13. For example, when a voltage indicating that the motor terminal voltage is “no” (no drive voltage is applied to the motor) is output from the motor voltage monitor unit 13 while the voltage is applied to the actual motor, the motor When welding of the relay contacts occurs in the operating region (for example, when the contacts a1 and c1 of the relay 22 are welded), the following problems may occur.

  That is, when welding of the relay contact occurs, the motor (M) 4 rotates, and when the rotational position of the motor (M) 4 reaches the open / close limit position of the window 42 and the rotation is locked, Even if the motor drive signals CW and CCW output from the drive controller 12 are turned off (low level), the terminal voltage is applied to the motor (M) 4 as it is. In this state, since the rotation of the motor (M) 4 is stopped, the motor rotation signal indicating the rotation of the motor is not output from the motor rotation detection unit 14, and a failure cannot be detected.

  That is, the rotation signal indicating the rotation of the motor is not output from the motor rotation detection unit 14 and the voltage detection signal indicating that the drive voltage is applied to the motor from the motor voltage monitoring unit 13 is not output. It is determined that the motor (M) 4 has stopped normally. For this reason, a voltage continues to be applied to the amateur terminals A1 and A2 of the motor (M) 4, and the motor (M) 4 may be burned out. In order to prevent this, a temperature detection element 8 such as a thermistor is mounted on the motor (M) 4 and the temperature of the motor (M) 4 is detected to prevent the motor (M) 4 from being burned out.

  As described above, when the motor terminal voltage cannot be normally detected due to the failure of the element in the motor terminal voltage detection circuit 23 or the failure of the motor voltage monitor unit 13, and welding of the relay contact occurs in the motor operating region. Since this failure cannot be detected, voltage may continue to be applied to the amateur terminals A1 and A2 of the motor (M) 4. Therefore, it is desired to provide a motor control device that can avoid the occurrence of this failure. .

  Further, when other motor terminal voltages cannot be detected normally, for example, the motor terminal voltage is “present” (the drive voltage applied to the motor) from the motor voltage monitor unit 13 even though the motor terminal voltage is actually “0”. The motor rotation direction indicated by the motor rotation signal output from the motor rotation detection unit 14 and the motor voltage signal output from the motor voltage monitor unit 13 are indicated. It has been desired to provide a motor control device that can determine this failure state even when there is a discrepancy in the motor rotation direction.

  In addition, the power window apparatus of a prior art is disclosed (refer patent document 1). However, the power window device disclosed in Patent Document 1 aims to provide a power window device capable of more faithfully detecting whether or not the electric drive means has generated heat by a simple method that does not require calculation processing time. However, it does not attempt to solve the problems caused by the failure of the motor voltage detection unit and the like as described above.

JP 2007-37311 A

  As described above, the motor terminal voltage cannot be normally detected due to a failure occurring in the motor voltage detection unit (the motor terminal voltage detection circuit 23 and the motor voltage monitor unit 13), and welding of the relay contact occurs in the motor operating region. In such a case, there is a possibility that a voltage may continue to be applied to the motor terminal because the failure cannot be detected. Therefore, it is desired to provide a motor control device that can determine in advance the failure of the motor voltage detection unit. It was.

  In addition, when the motor terminal voltage cannot be detected normally, for example, when the motor terminal voltage is “0”, the motor voltage detection unit outputs a signal indicating that the motor terminal voltage is “ Even when there is a discrepancy between the motor rotation direction indicated by the rotation detection signal output from the motor rotation detection unit and the motor rotation direction indicated by the motor voltage signal output from the motor voltage detection unit Accordingly, it has been desired to provide a motor control device that can determine a failure state in the motor control device.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to cause a failure in the motor voltage detection unit, and in that state, welding occurs at the relay contact, and voltage is applied to the motor terminal. An object of the present invention is to provide a motor control device and a motor device that can avoid the occurrence of a failure that continues.

  Another object of the present invention is to detect the motor terminal voltage in the motor voltage detection unit normally, or to detect the motor rotation direction indicated by the rotation detection signal output from the motor rotation detection unit and the motor voltage detection unit. Motor control device and motor device capable of determining occurrence of failure in motor control device according to the mode even when there is a discrepancy in the motor rotation direction indicated by the motor voltage signal output from Is to provide.

  The present invention has been made to solve the above problems, and a motor control device according to the present invention is a motor control device that drives and controls a motor that opens and closes an opening / closing body installed in a vehicle. A motor voltage detection unit that detects an applied drive voltage and outputs it as a motor voltage signal, and a signal from a rotation sensor that rotates in conjunction with the rotation shaft of the motor, and detects the rotation of the motor and outputs a motor rotation signal The motor rotation detection unit that outputs as a motor voltage signal output from the motor voltage detection unit and the motor rotation signal output from the motor rotation detection unit And a voltage detection failure determination unit that determines presence or absence of occurrence.

  Further, in the motor control device of the present invention, the voltage detection failure determination unit has a motor rotation indicating rotation of the motor from the motor rotation detection unit in a motor operating state when the opening / closing body is opened and closed by a normal operation. When a signal is output and a motor voltage signal indicating that a drive voltage is not applied to the motor is output from the motor voltage detection unit, it is determined that a failure has occurred in the motor voltage detection unit. It is characterized by.

  In the motor control device of the present invention, the motor rotation detection unit outputs a motor rotation signal corresponding to the rotation direction of the motor, and the motor voltage detection unit outputs a motor voltage signal corresponding to the rotation direction of the motor. And the voltage detection failure determination unit compares the rotation direction indicated by the motor rotation signal with the rotation direction indicated by the motor voltage signal. It is determined that a failure has occurred in the control device.

  In the motor control device of the present invention, the voltage detection failure determination unit indicates that the drive voltage is applied to the motor from the motor voltage detection unit in a state where the rotation of the motor is stopped. When the voltage signal is output, it is determined that a failure has occurred in the motor control device.

  In addition, the motor control device of the present invention includes an amateur terminal short circuit for short-circuiting the amateur terminal of the motor when the voltage detection failure determination unit determines that a failure has occurred.

  Moreover, the motor apparatus of this invention is comprised so that a motor may be driven using the motor control apparatus in any one of said.

In the motor control device of the present invention, there is provided a voltage detection failure determination unit that mutually monitors the motor voltage signal output from the motor voltage detection unit and the motor rotation signal output from the motor rotation detection unit, and the motor rotation detection unit Whether or not there is a failure is determined. For example, when a motor rotation signal indicating that the motor is rotating is output from the motor rotation detection unit and a motor voltage signal indicating that the drive voltage is not applied to the motor is output from the motor voltage detection unit, It is determined that the motor voltage detection unit has failed.
Thereby, it can be detected that a failure has occurred in the motor voltage detection unit. For this reason, it is possible to avoid the occurrence of a failure in which a failure occurs in the motor voltage detection unit, and welding occurs in the relay contact in this state and voltage is continuously applied to the motor terminal.

In the motor drive control unit of the present invention, a motor rotation signal indicating that the motor is rotating from the motor rotation detection unit in a motor operating state when the opening / closing body such as a window is driven to open and close by a normal operation. If the motor voltage signal is output and a motor voltage signal indicating that the drive voltage is not applied to the motor is output from the motor voltage detector, it is determined that the motor voltage detector is malfunctioning.
Thereby, it is possible to detect in advance that a failure has occurred in the motor voltage detection unit in the normal operation state of the motor. For this reason, in a state where a failure has occurred in the motor voltage detection unit, it is possible to avoid the occurrence of a failure in which relay contact welding occurs on the motor operating region side and voltage is continuously applied between the motor terminals. For this reason, it is not necessary to mount a temperature detection element for preventing motor burnout on the motor.

In the motor control device of the present invention, the voltage detection failure determination unit includes a rotation direction indicated by the motor rotation signal output from the motor rotation detection unit and a rotation direction indicated by the motor voltage signal output from the motor voltage detection unit. And in the case where there is a discrepancy in the respective rotation directions, it is determined that a failure has occurred in the motor control device.
Thereby, it can be detected that a failure has occurred in either the motor voltage detection unit or the motor rotation detection unit. That is, it is possible to improve the accuracy of detecting a failure that occurs in the motor control device and to improve the reliability of the motor control device.

In the motor control device of the present invention, when the voltage detection failure determination unit outputs a motor voltage signal indicating that the drive voltage is applied to the motor from the motor voltage detection unit when the motor is stopped. It is determined that a failure has occurred in the motor drive control unit.
Thereby, when a failure has occurred in the motor voltage detector, this can be detected in advance. Further, even when the relay contact is welded on the motor operating region side, this can be detected, and burning due to heating of the motor can be avoided. That is, it is possible to improve the accuracy of detecting a failure that occurs in the motor control device and to improve the reliability of the motor control device.

In the motor control device of the present invention, if the voltage detection failure determination unit determines that a failure has occurred in the motor control device, the motor's amateur terminal is short-circuited.
Thereby, when the occurrence of a failure in the motor control device is detected, the motor can be braked and stopped by dynamic braking.

  Moreover, in the motor apparatus of this invention, a motor is driven using the motor control apparatus of this invention. As a result, a motor device with improved reliability can be realized.

It is a figure which shows the structure of the motor control apparatus which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the failure determination operation | movement of the voltage detection failure determination part in 1st Embodiment. It is a figure for demonstrating the failure determination operation | movement of the voltage detection failure determination part in 2nd Embodiment. It is a figure for demonstrating the failure determination operation | movement of the voltage detection failure determination part in 3rd Embodiment. It is a figure which shows the structure of the motor control apparatus of the conventional power window apparatus for motor vehicles.

Hereinafter, embodiments of the present invention will be described in detail based on specific examples shown in the accompanying drawings.

[First Embodiment]
FIG. 1 is a diagram illustrating a configuration of a motor control device according to a first embodiment of the present invention, and is a diagram illustrating an example in which the motor control device of the present invention is applied to an automobile power window device.

  The motor control device 1 shown in FIG. 1 is mounted on the motor heating detection unit 15 and the motor (M) 4 in the motor control device 1a shown in FIG. 5 as compared with the conventional motor control device 1a shown in FIG. The difference is that a voltage detection failure determination unit 16 is newly added instead of deleting the temperature detection element 8. Other configurations are the same as those of the motor control device 1a shown in FIG. For this reason, the same code | symbol is attached | subjected to the same component.

  That is, the motor control device 1 of the present invention is characterized in that a voltage detection failure determination unit 16 is newly provided, and a motor voltage signal output from the motor voltage monitor unit 13 by the voltage detection failure determination unit 16. And the motor rotation signal output from the motor rotation detection unit 14 are mutually monitored to determine whether or not there is a failure.

  The motor control device 1 of the present invention shown in FIG. 1 and the conventional motor control device 1a shown in FIG. 3 have the same basic configuration. In the following description, the conventional motor control device of FIG. An explanation that overlaps with the explanation in 1a may be made.

  As shown in FIG. 1, the motor control device 1 has a signal input circuit 3 that converts contact signals of each opening / closing operation of the automatic operation switch 2a and the manual operation switch 2b provided in the driver's seat into voltage signals. ing. The motor drive control unit 12 in the CPU 11 receives the open / close operation signals of the automatic operation switch 2a and the manual operation switch 2b from the signal input circuit 3, and sets the DC motor (M) 4 to CW or CCW according to the open / close control signal. Drive forward and reverse in the direction.

  The motor (M) 4 is driven by driving the relay 22 through the relay drive circuit 21 by the motor drive signal CW or the motor drive signal CCW output from the motor drive control unit 12 in the CPU 11. For example, when a motor drive signal CW (high level) is applied from the motor drive control unit 12 in the CPU 11 to the base of the transistor Tr1, the relay coil 22a connected between the collector of the transistor Tr1 and the power source 31 is driven. The contacts a1 and c1 are turned on. As a result, power is applied to the armature terminals A1 and A2 of the motor (M) 4 with a polarity that rotates the motor (M) 4 in the CW direction, and the motor (M) 4 rotates in the CW direction.

  When a motor drive signal CCW (high level) is applied to the base of the transistor Tr2 from the motor drive controller 12 in the CPU 11, the relay coil 22b connected between the collector of the transistor Tr2 and the power source 31 is driven. The contact a2 and the contact c2 are turned on. As a result, power is applied to the armature terminals A1 and A2 of the motor (M) 4 with a polarity that rotates the motor (M) 4 in the CCW direction, and the motor (M) 4 rotates in the CCW direction.

  In addition, the CPU 11 has a motor voltage monitor unit 13 that detects the terminal voltage of the motor (M) 4 separately when the rotation direction of the motor (M) 4 is the CW direction and when the rotation direction is the CCW direction. . The motor voltage monitor unit 13 detects the motor voltage applied to the amateur terminals A 1 and A 2 of the motor (M) 4 through the motor terminal voltage detection circuit 23.

  When the motor (M) 4 is rotationally driven in the CW direction, the motor voltage monitor unit 13 includes a resistance voltage dividing circuit of resistors R11 and R12, a zener diode ZD1 for preventing overvoltage, and a smoothing capacitor C1. The motor voltage is detected by obtaining a signal from the circuit. For example, when the motor (M) 4 is driven in the CW direction, a positive power source is applied to the amateur terminal A1 of the motor (M) 4 through the contacts a1 and c1 of the relay 22, and the current flows in the direction of the current Ia. Flows. A voltage is generated at both ends of the resistor R12 by the current Ia, and the voltage generated at the resistor R12 is input to the motor voltage monitor unit 13 in the CPU 11 to detect a voltage in the CW direction.

  Similarly, when the motor (M) 4 is driven in the CCW direction, the motor voltage monitor unit 13 includes a resistance voltage dividing circuit of resistors R21 and R22, a Zener diode ZD2 for overvoltage prevention, and a smoothing capacitor C2. A signal is obtained from the configured circuit to detect the motor voltage.

  Thus, the motor voltage monitor unit 13 detects each motor terminal voltage in accordance with the rotation direction of the motor (M) 4 and outputs motor voltage signals in the CW direction and the CCW direction, respectively. This motor voltage signal is sent to the motor drive control unit 12.

  Further, the CPU 11 has a motor rotation detection unit 14. In the motor rotation detection unit 14, the rotation sensors 7 to 2 each composed of a sensor magnet 5 that rotates in conjunction with an amateur shaft (rotation axis Ar) of the motor (M) 4 and two-phase Hall elements 6a and 6b. Phase pulse signals PLSA and PLSB are received. The motor rotation detection unit 14 detects the rotation speed and the rotation direction of the motor (M) 4 based on the pulse intervals of the pulse signals PLSA and PLSB and the phase order of the two-phase pulses. The motor rotation detection unit 14 determines the rotational position of the motor (M) 4 by measuring the two-phase pulse signals PLSA and PLSB received from the rotation sensor 7 with a counter (not shown) or the like. For example, the window open / close stop position (open / close limit position) in the power window device is determined. The motor rotation signal (rotation speed, rotation direction discrimination signal, and signal indicating the rotation position of the motor) detected by the motor rotation detection unit 14 is sent to the motor drive control unit 12.

  Further, a voltage detection failure determination unit 16 is provided in the CPU 11. As described above, the voltage detection failure determination unit 16 is a characteristic part of the motor control device 1 of the present invention, and the operation of the voltage detection failure determination unit 16 will be described in detail below.

  The voltage detection failure determination unit 16 receives a motor voltage signal from the motor voltage monitor unit 13 and a motor rotation signal from the motor rotation detection unit 14. The voltage detection failure determination unit 16 performs a process of mutually monitoring the motor voltage signal input from the motor voltage monitor unit 13 and the motor rotation signal input from the motor rotation detection unit 14 during normal operation.

  In the voltage detection failure determination unit 16, the motor rotation signal input from the motor rotation detection unit 14 indicates the rotation state of the motor, and the motor voltage signal input from the motor voltage monitor unit 13 indicates that the motor terminal voltage is “none” ( If the drive voltage is not applied to the motor), it is determined that a failure has occurred in the motor voltage detection unit (the portion configured by the motor terminal voltage detection circuit 23 and the motor voltage monitor unit 13). When this failure mode occurs, the operation of the motor (M) 4 is stopped.

  In this case, the motor drive control unit 12 turns on the motor drive signal CW (high level), drives the relay coil 22a through the transistor Tr1, and turns on the contact point a1 and the contact point c1. At the same time, the motor drive control unit 12 turns on the motor drive signal CCW (high level), drives the relay coil 22b through the transistor Tr2, and turns on the contacts a2 and c2. As a result, a short circuit of the arm terminals A1 and A2 of the motor (M) 4 is formed through the contacts a1, c1, a2 and c2, and the motor (M) 4 is braked and stopped by dynamic braking.

  FIG. 2 is a diagram for explaining a failure determination operation in the voltage detection failure determination unit 16. The example shown in FIG. 2 is an example when the motor voltage signal CW cannot be detected in a state where the motor (M) 4 is driven in the CW direction. Hereinafter, the failure determination operation in the voltage detection failure determination unit 16 will be described with reference to FIGS.

  At time T1, the motor drive signal CW output from the motor drive control unit 12 becomes high level (ON), the relay coil 22a shown in FIG. 1 is driven, and the relay contacts a1 and c1 are closed. Accordingly, a voltage having a polarity for rotating the motor (M) 4 in the CW direction is applied to the amateur terminals A1 and A2, and the motor (M) 4 rotates in the CW direction.

  On the other hand, when the motor (M) 4 rotates in the CW direction, a motor rotation signal (pulse signal in this example) is output from the motor rotation detection unit 14. On the other hand, since the motor voltage monitor unit 13 is out of order, the motor voltage signal CW output from the motor voltage monitor unit 13 remains at the low level (L).

  The voltage detection failure determination unit 16 monitors the motor rotation signal (pulse signal) output from the motor rotation detection unit 14 and the motor voltage signal CW output from the motor voltage monitor unit 13, and during a predetermined period ΔT. (Time T1 to Time T2) Since the motor terminal voltage cannot be detected when the motor voltage signal CW remains at the low level, the motor voltage detection unit (the motor voltage monitor unit 13 and the motor terminal voltage detection circuit 23 are configured. It is determined that a failure has occurred in the portion). Then, the voltage detection failure determination unit 16 notifies the motor drive control unit 12 that a failure has occurred in the motor voltage detection unit.

  When the motor drive control unit 12 receives the notification of the failure determination signal from the voltage detection failure determination unit 16, the motor drive signal CCW is also set to the high level (ON) at time T3, and drives the relay coil 22b shown in FIG. The relay contacts a2 and c2 are closed. As a result, the arm terminals A1 and A2 of the motor (M) 4 are short-circuited, and the rotation of the motor (M) 4 is braked and stopped.

  Thus, in the motor control device 1 of the present invention, when a failure has occurred in the motor voltage detection unit (the motor voltage monitor unit 13 and the motor terminal voltage detection circuit 23), This can be detected. For this reason, it is possible to avoid the occurrence of a failure in which a failure occurs in the motor voltage detection unit and relay welding occurs in that state, and voltage continues to be applied to the motor terminals. For this reason, it is not necessary to mount the motor burnout prevention element (refer to the temperature detection element 8 shown in FIG. 5), which has been necessary in the past, on the motor (M) 4.

  The first embodiment of the present invention has been described above. In the motor control device 1 shown in FIG. 1, the motor voltage detection unit described above corresponds to the motor voltage monitor unit 13 and the motor terminal voltage detection circuit 23. The motor rotation detection unit described above corresponds to the motor rotation detection unit 14 and the rotation sensor 7, and the voltage detection failure determination unit corresponds to the voltage detection failure determination unit 16. Further, the above-described amateur terminal short circuit corresponds to a contact circuit of a relay 22 driven by the motor drive control unit 12 and the relay drive circuit 21 (a circuit constituted by the contacts a1, c1, a2, and c2).

The motor control device according to the present invention includes a motor voltage detection unit (a motor voltage monitor unit 13 and a motor) that detects a drive voltage applied to the motor (M) 4 as a motor voltage signal in the motor control device 1 shown in FIG. The motor rotation detection unit (rotation with the motor rotation detection unit 14 and the rotation) detects the rotation of the motor (M) 4 as a motor rotation signal with the signals from the terminal voltage detection circuit 23) and a rotation sensor linked to the rotation axis of the motor as inputs. Voltage detection failure for determining occurrence of failure in the motor voltage detection unit by comparing the sensor 7), the motor voltage signal output from the motor voltage detection unit, and the motor rotation signal output from the motor rotation detection unit And a determination unit 16.
Thereby, a failure in the motor voltage detection unit (the motor voltage monitor unit 13 and the motor terminal voltage detection circuit 23) can be detected. For this reason, it is possible to avoid the occurrence of a failure in which a failure occurs in the motor voltage detection unit, and welding occurs in the relay contact in that state, and voltage continues to be applied to the motor terminal.

In the motor control device according to the present invention, the voltage detection failure determination unit 16 is configured such that the motor rotation detection unit (rotation with the motor rotation detection unit 14 and the rotation) in the motor operating state when the opening / closing body such as a window is driven to open and close by a normal operation. A motor rotation signal indicating the rotation of the motor is output from the sensor 7), and a motor voltage signal indicating that the drive voltage is not applied to the motor from the motor voltage detection unit (motor voltage monitor unit 13 and motor terminal voltage detection circuit 23). Is output, it is determined that a failure has occurred in the motor voltage detector.
Thereby, in the normal operation state of the motor, a failure in the motor voltage detection unit can be detected in advance. For this reason, it is possible to avoid the occurrence of a failure in which a failure occurs in the motor voltage detection unit, and welding occurs in the relay contact in that state, and voltage continues to be applied to the motor terminal.

In addition, the motor control device of the present invention is an amateur terminal short circuit (contact a1, relay 22 of the relay 22) that shorts the amateur terminal of the motor (M) 4 when the voltage detection failure determination unit 16 determines that a failure has occurred. c1, a2 and c2).
Thereby, when it is determined by the voltage detection failure determination unit 16 that a failure has occurred, the amateur terminal of the motor (M) 4 is short-circuited, and the motor (M) 4 is braked by dynamic braking and stopped. Can do.

[Second Embodiment]
In the first embodiment described above, a failure occurs in the motor voltage detection unit, and a relay contact is welded in that state, and a failure in which voltage is continuously applied to the motor is avoided. I explained an example. However, the present invention is not limited to this, and the voltage detection failure determination unit 16 provided in the motor control device 1 of the present invention can be further added with a function for detecting other failure states.

  In the second embodiment of the present invention, the voltage detection failure determination unit 16 outputs a rotation direction determination signal (a rotation direction determination signal indicating whether the motor rotation direction is CW or CCW) output from the motor rotation detection unit 14. An example of comparing the coincidence and inconsistency with a motor voltage signal output from the motor voltage monitoring unit 13 (a signal indicating that the drive voltage applied to the motor is a voltage in the CW direction or a voltage in the CCW direction) will be described.

  FIG. 3 is a diagram for explaining a failure determination operation of the voltage detection failure determination unit 16 according to the second embodiment. The example shown in FIG. 3 is an example when a motor voltage signal indicating the CCW direction is output from the motor voltage monitor unit 13 when the motor (M) 4 is driven in the CW direction. Hereinafter, the failure determination operation in the voltage detection failure determination unit 16 will be described with reference to FIG.

  At time T1, the motor drive signal CW output from the motor drive control unit 12 becomes high level (ON), the relay coil 22a shown in FIG. 1 is driven, and the relay contacts a1 and c1 are closed. As a result, a voltage having a polarity rotating in the CW direction is applied to the motor (M) 4, and the motor (M) 4 rotates in the CW direction.

  The motor rotation detection unit 14 determines the rotation direction based on the phase order of the two-phase pulse signals PLSA and PLSB output from the rotation sensor 7 and outputs a rotation determination signal CW in the CW direction. On the other hand, since the motor voltage monitor unit 13 (or the motor terminal voltage detection circuit 23) is out of order, the motor voltage signal CCW indicating that the rotation direction is CCW is high level (from the motor voltage monitor unit 13). H) and output. That is, there is a discrepancy between the rotation determination signal CW output from the motor rotation detection unit 14 and the motor voltage signal CCW output from the motor voltage monitor unit 13.

  The voltage detection failure determination unit 16 monitors the rotation direction determination signal output from the motor rotation detection unit 14 and the motor voltage signal CCW output from the motor voltage monitor unit 13, and during a predetermined period ΔT (time T1) ~ Time T2) If the disagreement continues, it is determined that a failure has occurred in the motor voltage detection unit (portion constituted by the motor voltage monitor unit 13 and the motor terminal voltage detection circuit 23). Then, the voltage detection failure determination unit 16 notifies the motor drive control unit 12 that a failure has occurred in the motor voltage detection unit.

  When the motor drive control unit 12 receives the notification of the occurrence of the failure from the voltage detection failure determination unit 16, the motor drive signal CCW is also set to the high level (ON) at time T3, and drives the relay coil 22b shown in FIG. Relay contacts a2 and c2 are closed. As a result, the arm terminals A1 and A2 of the motor (M) 4 are short-circuited, and the motor (M) 4 can be braked and stopped by dynamic braking.

  In the example described with reference to FIG. 3, when the motor (M) 4 is driven in the CW direction, a motor voltage signal indicating the CCW direction is output from the motor voltage detection unit, thereby causing a failure in the motor voltage detection unit. Although an example of detecting occurrence of the above has been described, there is a case in which it is opposite. For example, when the motor (M) 4 is driven in the CW direction, the motor rotation detection unit 14 outputs a rotation direction determination signal indicating the CCW direction, and the motor voltage detection unit outputs a motor voltage signal indicating the CW direction. If it is, it can be determined that a failure has occurred in the motor rotation detector.

  As described above, the second embodiment of the present invention is configured to detect a mismatch between the motor rotation signal output from the motor rotation detection unit and the motor voltage signal output from the motor rotation detection unit. Yes. Thereby, it can be detected that a failure has occurred in either the motor voltage detection unit or the motor rotation detection unit. That is, it is possible to improve the accuracy of detecting a failure that occurs in the motor control device and to improve the reliability of the motor control device.

[Third Embodiment]
Next, as a third embodiment of the present invention, an example in which a motor voltage signal is output from the motor voltage monitor unit 13 in a state where a motor drive signal is not output from the motor drive control unit 12 will be described. .

  FIG. 4 is a diagram for explaining a failure determination operation of the voltage detection failure determination unit 16 according to the third embodiment. Hereinafter, the failure determination operation in the voltage detection failure determination unit 16 will be described with reference to FIG.

  At time T1, the motor voltage signal CW output from the motor voltage monitor unit 13 is obtained. On the other hand, the motor drive signals CW and CCW from the motor drive control unit 12 remain at low level (OFF), and the motor rotation signal output from the motor rotation detection unit 14 also remains at high level. That is, although the motor (M) 4 is not driven and the motor is not rotating, the motor voltage signal CW is output from the motor voltage monitor unit 13.

  The voltage detection failure determination unit 16 monitors the motor voltage signal CW output from the motor voltage monitoring unit 13, and the motor voltage signal CW remains at a constant level for a predetermined period ΔT (time T1 to time T2). If the motor rotation detection unit (the motor voltage monitor unit 13 and the motor terminal voltage detection circuit 23) has failed or the relay contact is welded, the rotation of the motor is stopped. Notify the motor drive control unit 12.

  When the motor drive control unit 12 receives the notification of the failure determination signal from the voltage detection failure determination unit 16, at time T3, the motor drive signals CW and CCW are set to high level (ON), and the relay coil 22b shown in FIG. Drive to close relay contacts a2 and c2. As a result, if the relay contact is welded to the motor operating region side, the arm terminal of the motor (M) 4 is short-circuited, and the rotation of the motor (M) 4 is braked and stopped.

  Thus, in the third embodiment of the present invention, it is detected that a motor voltage signal is output from the motor voltage monitor unit 13 even though the motor (M) 4 is not driven. Thereby, when a failure has occurred in the motor voltage monitor unit 13, this can be detected in advance. Further, even when the relay contact is welded on the motor operating region side, this can be detected. In particular, when the relay contact is welded on the motor operating region side, the motor (M) 4 can be prevented from being burned by heating by short-circuiting the arm terminal of the motor (M) 4 with the relay contact.

  The first embodiment, the second embodiment, and the third embodiment of the motor control device according to the present invention have been described above. As described in these embodiments, the motor according to the present invention. In the control device, the occurrence of a failure in the motor voltage detection unit can be determined, and the motor rotation signal output from the motor rotation detection unit is compared with the signal output from the motor voltage detection unit to It is also possible to determine other various modes of faults that occur in (1). That is, it is possible to increase the accuracy of failure determination in the motor control device.

  And it becomes possible to implement | achieve the motor apparatus which improved more reliability by comprising the motor apparatus which drives a motor with the motor control apparatus of this invention.

  The motor control device of the present invention has been described above, but the processes in the motor drive control unit 12, the motor voltage monitor unit 13, the motor rotation detection unit 14, and the voltage detection failure determination unit 16 in the CPU 11 shown in FIG. When the CPU 11 reads and executes the program stored in the unit 17, the processing function of each unit is realized.

  Further, as the CPU 11, a counter circuit or a device incorporating hardware such as an A / D converter or a D / A converter, if desired, may be used. By using the hardware function of the above, the hardware means and software means are made to cooperate in each process in the motor drive control unit 12, the motor voltage monitor unit 13, the motor rotation detection unit 14, and the voltage detection failure determination unit 16. Can be done. Further, any or all of the motor drive control unit 12, the motor voltage monitor unit 13, the motor rotation detection unit 14, and the voltage detection failure determination unit 16 may be configured by dedicated hardware.

  Although the embodiment of the present invention has been described above, the motor control device of the present invention is not limited to the above illustrated example, and various modifications can be made without departing from the gist of the present invention. Of course.

DESCRIPTION OF SYMBOLS 1, 1a ... Motor control apparatus, 2a ... Automatic operation switch, 2b ... Manual operation switch, 3 ... Signal input circuit, 4 ... Motor (M), 5 ... Sensor magnet, 6a, 6b ... Hall element, 7 ... Rotation sensor, 8 ... Temperature detection element, 11 ... CPU, 12 ... Motor drive controller, 13 ... Motor voltage monitor, 14. ..Motor rotation detection unit, 15 ... motor heating detection unit, 16 ... voltage detection failure determination unit, 17 ... storage unit, 21 ... relay drive circuit, 22 ... relay, 22a, 22b ... Relay coil, 23 ... Motor terminal voltage detection circuit, 31 ... Power supply, 41 ... Reducer, 42 ... Window

Claims (6)

A motor control device that drives and controls a motor that opens and closes an opening / closing body installed in a vehicle,
A motor voltage detector for detecting a drive voltage applied to the motor and outputting the detected voltage as a motor voltage signal;
A motor rotation detection unit that receives a signal from a rotation sensor that rotates in conjunction with the rotation axis of the motor, detects the rotation of the motor, and outputs it as a motor rotation signal;
Voltage detection failure for determining whether or not a failure has occurred in the motor voltage detection unit by comparing the motor voltage signal output from the motor voltage detection unit with the motor rotation signal output from the motor rotation detection unit A determination unit;
A motor control device comprising: In the voltage detection failure determination unit,
In the motor operating state when opening and closing the opening and closing body by normal operation,
When a motor rotation signal indicating rotation of the motor is output from the motor rotation detection unit and a motor voltage signal indicating that a drive voltage is not applied to the motor is output from the motor voltage detection unit, The motor control device according to claim 1, wherein it is determined that a failure has occurred in the motor voltage detection unit. The motor rotation detection unit outputs a motor rotation signal corresponding to the rotation direction of the motor,
The motor voltage detector outputs a motor voltage signal corresponding to the rotation direction of the motor,
The voltage detection failure determination unit compares the rotation direction indicated by the motor rotation signal with the rotation direction indicated by the motor voltage signal. The motor control device according to claim 1, wherein it is determined that a failure has occurred. The voltage detection failure determination unit
In a state where the rotation of the motor is stopped,
2. When a motor voltage signal indicating that a drive voltage is applied to the motor is output from the motor voltage detection unit, it is determined that a failure has occurred in the motor control device. The motor control device described in 1. When it is determined by the voltage detection failure determination unit that a failure has occurred,
The motor control device according to any one of claims 1 to 4, further comprising an armature terminal short circuit that short-circuits the armature terminal of the motor. It is comprised so that a motor may be driven using the motor control apparatus in any one of Claims 1-5. The motor apparatus characterized by the above-mentioned.

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