JP2589589Y2 - Control device for opening / closing body drive motor for vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vehicle opening / closing body driving motor, and more particularly to a vehicle opening / closing body driving motor control device characterized in that the control is performed when the rotation direction of the motor being driven is changed. is there.

[0002]

2. Description of the Related Art For example, there is a power window device that opens and closes a window glass of an automobile using a driving force of a motor. In general, a motor used in such a device is configured as shown in a block diagram in FIG. In the figure, reference numeral 1 denotes an operation switch, and one movable contact 1a and 4
And two fixed contacts 1b to 1e. Reference numeral 9 denotes a motor, and drive circuits 52 and 53 for selectively connecting a power supply 51 to both terminals thereof are connected to the respective terminals. Then, by closing the manual-up contact 1b, the drive circuit 52 is turned on, and a current is supplied to the motor 9 in the direction shown by the arrow A in the figure for a period of time during which the contact 1b is closed to correct the motor 9. I am trying to turn it over. When the manual down contact 1d is closed, the drive circuit 53 is closed.
Is turned on, and a current is supplied to the motor 9 in the direction shown by the arrow B in the figure for the time during which the contact 1d is closed, thereby causing the motor 9 to rotate in the reverse direction. Further, by providing the timer circuit 54, when the auto-up contact 1c is closed, the drive circuit 52 is turned on for a predetermined time, and the motor is automatically driven to rotate forward. Similarly, when the auto-down contact 1e is closed, the drive circuit 53 is turned on for a predetermined time, and the motor is automatically driven in reverse rotation.

[0003]

In the circuit having the above structure, for example, the motor 9 is automatically rotated forward by closing the auto-up contact 1c, and the manual down contact 1d or the auto-down contact 1e is turned on during the driving. When the motor is closed and the motor is rotated in the reverse direction, the rotating direction of the motor suddenly reverses, so that a large current generated at that time flows through the drive circuits 52 and 53, which may shorten the life of each element in the drive circuit. There is.

[0004] In view of the problems of the prior art, a main object of the present invention is to provide a control circuit for a forward / reverse motor that can improve the durability of a drive circuit.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a motor-operated contact for moving a vehicle opening / closing body in an opening or closing direction by a motor, and fully opening or fully opening the vehicle opening / closing body. An operation switch having an automatic operation contact for automatically moving the motor to a closed position, an open and close drive circuit for driving the motor in a corresponding direction according to each contact signal of the operation switch, When the operation switch is operated to reverse the rotation direction of the motor, the both electrodes of the motor are set to the same potential for a predetermined time.
To generate braking force due to electromagnetic induction.
And a timer means for reversing the motor after the driving is stopped, thereby providing a control device for a vehicle opening / closing body driving motor.

[0006]

In this manner, when the operation switch is operated to reverse the rotation direction of the motor, the operation of the motor is not performed for a predetermined period of time, instead of immediately switching to the drive circuit corresponding to the switch operation. After turning off the motor, the corresponding drive circuit is turned on to reverse the motor, so that a large current due to the sudden reversal does not flow through the drive circuit.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is an electric circuit diagram showing a control circuit of a forward / reverse motor to which the present invention is applied, which is used, for example, in a power window device of an automobile. The operation switch 1 connected to the plus terminal + of the power supply (not shown) includes a movable contact 1a, a manual open contact 1b, an auto open contact 1c, a manual close contact 1d,
And an auto-close contact 1e. The manual open contact 1b is grounded via the diode 2 and further via the coil 3a of the relay 3 to GND to which the above-mentioned negative terminal of the battery is connected. The auto-open contact 1c is connected to the relay coil 3a via the diode 4 in the forward direction. The manual closing contact 1d is grounded via the diode 5 in the forward direction and further via the coil 6a of the relay 6 to GND. The auto-close contact 1e is connected to the relay coil 6a via the diode 7 in the forward direction.

The normally open contact 3c of the relay 3 is connected to the positive terminal + of the battery and has the normally closed contact 3c.
b is grounded to GND via a shunt resistor 8. The normally open contact 6c of the relay 6 is connected to the positive terminal + of the battery and the normally closed contact 6b.
Is grounded to GND via a shunt resistor 8.
Each terminal of the motor 9 is connected to each movable contact of these relays.

Automatic open contact 1c of operation switch 1
Are grounded through a resistor 10 and a diode 11 in the forward direction, and further through a time constant circuit including a capacitor 12 and a resistor 13 to GND. A node 14 between the diode 11 and the capacitor 12 is connected to an inverting input terminal − of an operational amplifier 16 via a resistor 15. The non-inverting input terminal + of the operational amplifier 16 has a positive terminal +
The nodes of resistors 17 and 18 connected in series between the power supply and GND are connected, and the output terminal thereof is connected to the base of a PNP-type transistor 21 via a resistor 20 via a diode 19 in the reverse direction. ing. A resistor 22 is connected between the base and the emitter of the transistor 21. The emitter is connected to the movable contact of the relay 3 via the diode 23 in the reverse direction, and the collector is connected to the relay coil 3a. Auto-close contact 1
The node 14 is connected to e via a resistor 24 and a diode 25 in the forward direction. The base of a PNP transistor 28 is connected to the output terminal of the operational amplifier 16 via a diode 26 in the reverse direction and a resistor 27. A resistor 29 is connected between the base and the emitter of the transistor 28. The emitter is connected to the movable contact of the relay 6 via the diode 30 in the reverse direction, and the collector is connected to the relay coil 6a. As described above, the output state of the operational amplifier 16 is changed by charging / discharging of the capacitor 12, and each transistor 2
By turning on and off 1, 28, the relays 3, 6 are kept on.

The inverting output terminal of the operational amplifier 31 is connected to a node between the normally closed contacts 3b and 6b of each of the relays 3 and 6 and the shunt resistor 8. The non-inverting input terminal + of the operational amplifier 31 is connected to the nodes of resistors 32 and 33 connected in series between the positive terminal + of the power supply and GND. The output terminal of the operational amplifier 31 is connected to the inverting input terminal of the operational amplifier 16 via a resistor 34 and to the inverting input terminal of the operational amplifier 16 via a zener diode 35 in the reverse direction.

Two diodes 36 and 37 having their respective anodes connected in series are connected in parallel between both terminals of the motor 9, and a plus terminal + is connected to a node 38 thereof via a resistor 39. I have. The base of an NPN transistor 42 is connected to the node 38 via a resistor 40 and a zener diode 41 in the reverse direction. The node 14 is connected to the collector of the transistor 42 via the resistor 43, and the emitter is grounded to GND. The diodes 36, 37, 41, the resistors 39, 40, 43, the transistor 42, and the capacitor 12 constitute timer means.

Next, the operation of the electric circuit having the above configuration will be described. First, when the manual open contact 1b is closed, the coil 3a of the relay 3 is excited and the normally open contact 3b is closed.
c is closed and the normally closed contact 6b of the relay 6 is closed, so that a current flows through the motor 9 in the direction indicated by the arrow A in the figure.
The motor is driven (the rotation direction of the motor at this time is set to forward rotation). This driving is continued while the manual open contact 1b is closed. In addition, manual close contact 1d
Is closed, the coil 6a of the relay 6 is excited, the normally open contact 6c is closed, and the normally closed contact 3b of the relay 3 is closed. The current flows, and the motor is driven (the motor rotation direction at this time is reversed). This driving is continued while the manual closing contact 1d is closed.

When the auto-open contact 1c is closed, the coil 3a of the relay 3 is excited and the normally-open contact 3c is closed, and the normally-closed contact 6b of the relay 6 is closed. , A current flows in a direction indicated by an arrow A in the figure, the motor is driven, the capacitor 12 is rapidly charged, the potential of the inverting input terminal-of the operational amplifier 16 rises, and exceeds the potential of the non-inverting input terminal +. Therefore,
The output of the operational amplifier 16 at the high level is inverted to the low level, and the base of the transistor 21 is reverse-biased and turned on. Therefore, this transistor 2
Since one collector current is supplied to the relay coil 3a, the relay keeps on. This relay-on state is continued while the transistor 21 is on, that is, with a time limit determined by the capacitor 12 and the resistor 13, so that the motor 9 is driven. Also,
When the auto-close contact 1e is closed, the coil 6a of the relay 6 is excited, the normally-open contact 6c is closed, and the normally-closed contact 3b of the relay 3 is closed. A current flows in the direction shown by the arrow, the motor 9 is driven, the capacitor 12 is rapidly charged, and the potential of the inverting input terminal-of the operational amplifier 16 rises and exceeds the potential of the non-inverting input terminal +. Therefore, the output of the operational amplifier 16 that has been at the high level is inverted to the low level, and the base of the transistor 28 is reverse-biased and turned on. Therefore, the collector current of transistor 28 is supplied to relay coil 6a, so that relay 6 is kept on.

If a certain load is applied during the forward rotation of the motor 9, the potential of the inverting input terminal of the operational amplifier 31 rises due to the overcurrent flowing through the motor 9, and the non-inverting input The output of the operational amplifier 31 which has exceeded the potential of the terminal + and has been at the high level is inverted to the low level. Therefore, even if the potential of the capacitor 12 exceeds the Zener voltage of the Zener diode 35, the inversion output terminal-of the operational amplifier 16 is discharged through the resistor 34 faster than the normal discharge, and the potential of the inversion output terminal + is maintained. Because it is maintained at this Zener voltage,
The output of the operational amplifier 16 is inverted to a high level. Therefore, the transistor 21 that has been on is turned off, no current is supplied to the relay coil 3a, and the motor 9 stops.

Further, if the manual close contact 1d or the automatic close contact 1e is closed while the auto-up contact 1c is closed and the motor 9 is rotating forward, one of the contacts 1d and 1e is closed. relay 6 at the moment when closed is Ri Do the oN state, the coils 6a of the relay 6
Energized, the normally open contact 6c closes, and both poles of the motor 9 are energized.
Loop, that is, a short circuit between both poles of the motor 9
Is configured. As a result, braking force due to electromagnetic induction is applied.
Therefore, the motor 9 stops early . Then, the node 38
Rises above the Zener voltage of the Zener diode 41, a current flows in the Zener diode 41 in the opposite direction, and the transistor 42 is turned on. Therefore, the capacitor 12 is discharged via the resistor 43 for a predetermined time period, and the transistor 21 is turned off as described above. During this discharge, for example, 0.2 mS
Since the relays 3 and 6 are turned on and then the relay 3 is turned off, the motor temporarily stops and then reverses. No reverse current is generated. Further, a detailed description of the case where the manual up contact 1b and the auto up contact 1c are closed when the motor 9 is driven in the reverse direction is omitted, but in this case, the motor 9 is temporarily stopped as described above. It is configured to reverse after being stopped.

Although the present embodiment has been described as a motor control device for opening and closing a window glass of a vehicle, it can be used as a sunroof opening and closing device if the window glass is replaced with a sunroof glass.

[0018]

As is apparent from the above description, according to the control device for a vehicle opening / closing body drive motor according to the present invention,
If there is a request to reverse the rotation direction during driving the motor, the driving is temporarily stopped and then reversed, so there is no large current generated by the sudden reversing operation, and each element in the drive circuit is Since they can be operated with the rated specifications, their life can be extended, and the reliability of the entire apparatus can be improved.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram showing a control circuit of a forward / reverse rotatable motor to which the present invention is applied.

FIG. 2 is a block diagram showing a schematic configuration of a conventional control circuit for a forward / reverse motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operation switch 3, 6 Relay 9 Motor 12 Capacitor 13 Resistance 17 Operational amplifier 21, 22 Transistor 36, 37 Diode 41 Zener diode 42 Transistor 43 Resistance

Continuation of the front page (56) References JP-A-60-187285 (JP, U) JP-A 4-132179 (JP, U) JP-A-3-40012 (JP-A 4-132179) Microfilm photographing the contents of the attached specification and drawings (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E05F 15/10-15/16 B60J 1/00-1/17

Claims (1)

(57) [Scope of request for utility model registration] 1. A manually operated contact for moving a vehicle opening / closing body in an opening direction or a closing direction by a motor,
An operation switch having an automatic operation contact for automatically moving the vehicle opening / closing body to a fully open or fully closed position; and for driving the motor in a corresponding direction according to each contact signal of the operation switch. Open and close drive circuits, and when the operation switch is operated to reverse the rotation direction of the motor, the two poles of the motor are
By connecting to the same potential, braking force by electromagnetic induction
A control device for a vehicle opening / closing body drive motor, comprising: timer means for inverting the motor after generating and stopping the drive.