JPH07114555B2 - Motor control circuit - Google Patents

Description

The present invention relates to a motor control circuit, and more particularly to a motor control circuit that controls driving of a motor in accordance with the states of respective manual and automatic operation switches. The present invention relates to a motor control circuit.

<Prior Art> Conventionally, there has been a control circuit capable of selectively and automatically operating a motor.For example, in a control circuit of an electric power seat for an automobile, a slide amount or a reclining amount of a seat is manually set. In some cases, the motor control for displacing each part of the seat is controlled according to each switch signal of manual and automatic regeneration in order to adjust automatically or automatically reproduce the stored state. In such a control circuit for an electric power seat for an automobile, there is one that operates a motor drive relay coil by a drive signal via a CPU, but it is desirable that the CPU can be manually operated when the CPU is abnormal. For that purpose, there is one in which the relay coil and the manual switch are directly connected.

With the above-mentioned structure, if the manual operation switch is operated in an attempt to interrupt the automatic regeneration, the automatic regeneration operation is canceled and the manual operation is started at the same time. In such a case, for example, it is preferable that the automatic regeneration operation is canceled and the operation is stopped when the first manual operation switch is operated, and the manual operation is enabled after the second manual operation switch is operated. However, as described above, in the case where the relay coil and the manual switch are directly connected,
It cannot be dealt with programmatically. Therefore, CP
There is a problem that it is difficult to enable both the manual operation when the U is abnormal and the above operation when the manual operation switch is operated during the automatic operation.

<Problems to be Solved by the Invention> With respect to such problems of the conventional technology, a main object of the present invention is to provide an automatic operation when a manual operation switch is operated during an automatic operation by a simple circuit configuration. It is an object of the present invention to provide an improved motor control circuit so that the motor can be driven when it is stopped and then the manually operated switch is operated.

[Configuration of the Invention] <Means for Solving the Problems> According to the present invention, an object is to provide an automatic drive circuit for driving a motor by inputting an ON signal of an automatic operation switch, and an ON operation of a manual operation switch. A manual drive circuit provided in parallel with the automatic drive circuit so as to drive the motor according to a state, and one of the drive circuits is controlled to an operable state according to a state of each switch. Means, and when the manual operation switch is turned on during the operation of the automatic drive circuit, the automatic drive circuit is stopped and the manual drive circuit is temporarily stopped, and the manual operation switch is once turned off. And a means for enabling the manual drive circuit when it is turned off and then turned off again. More is achieved.

<Operation> In this way, the drive control of the motor can be performed automatically and manually, and if the manual operation switch is operated during the automatic operation, it is temporarily stopped, and then, for example, the manual operation switch is operated. The motor can be driven according to the ON state of the manual operation switch by once turning the switch OFF and then turning it ON again.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing a motor drive control circuit 1 of an electric power seat for an automobile to which the present invention is applied. In the CPU 2 of the control circuit 1, for example, each input terminal a connected to each open / close contact terminal of an automatic operation switch 3 provided on a seat (not shown) and a manual operation switch 4 composed of two 2-position selection switches. b, c, d, and e are connected to each other. Further, both terminals of the motor 5 for displacing the seat in the sliding direction are connected to the output terminals f and g of the control circuit 1, and both terminals of the motor 6 for displacing the seat in the reclining direction are output terminals h. -Connected to i. The automatic operation switch 3 is for automatically displacing the seat to the set position stored in the CPU, and when the automatic operation signal is input from the switch 3, the CPU 2
Controls the motors 5 and 6. The manual operation switch 4 is for manually adjusting the slide amount and the reclining amount of the seat, for example.

Each of the motors 5 and 6 is equipped with a pulse generator for detecting the number of rotations of each rotation shaft, and the pulse signal is input to the CPU 2. The CPU2 counts the pulse signal and stores the counted number, and outputs a drive signal from the output terminal C1, C2, C3, C4 to output the drive signal to displace the seat to the position based on the stored value during automatic operation. It is designed to output to. Further, during manual operation, each motor is driven by each contact signal without passing through the CPU2, but the CPU2 counts pulse signals according to the contact signal.

Next, the configuration inside the control circuit 1 will be described below. The bases of the transistors T1, T2, T3, and T4 are connected to the output terminals C1 to C4 of the CPU2. The collectors of the transistors T1 to T4 are connected to the power supply terminal Vo through the coils of the relays RY1, RY2, RY3, and RY4, respectively, and the emitters are grounded. In this way, the automatic drive circuit 7
Is configured.

Also, the common terminals of the contacts of the relays RY1 and RY2 are connected to the respective terminals of the motor 5 via the respective output terminals f and g,
Each common terminal of the contacts of relays RY3 and RY4 is connected to each output terminal h.
Each terminal of the motor 6 is connected via i. The relays RY1 to RY4 are designed to ground the respective terminals of the corresponding motors 5 and 6 in the non-excited state and supply the voltage from the power supply terminal Vo in the excited state.

Each input terminal b connected to the above-mentioned manual operation switch 4
~ E are connected to the constant power supply terminal Vc through the corresponding resistors R1, R2, R3, and R4, respectively, and are also connected to the input terminals C5 to C8 of the CPU2. It is connected to the respective bases of the transistors T5, T6, T7 and T8 via the circuits NT1 to NT4. These transistors T5-T8
Each of the collectors is connected to each coil of the relays RY1 to RY4, like the collectors of the transistors T1 to T4 described above. Further, the emitters of the transistors T5 to T8 are connected to the collector of the common transistor T9, and are grounded when the transistor T9 is on. The manual drive circuit 8 configured in this manner is provided in parallel with the automatic drive circuit 7.

The above-mentioned output terminals C1 to C4 of the CPU2 are grounded via the corresponding resistors R5, R6, R7, and R8, respectively,
It is connected to an AND circuit 10 via an OR circuit 9. The input terminals b to e are connected to the AND circuit 10 via an AND circuit 11 and further via a knot circuit 12. The output terminal of the AND circuit 11 is connected to the reset terminal R of the flip-flop 13, and the AND circuit 10
The output terminal of is connected to the clock terminal CK of the flip-flop 13. The set terminal S of this flip-flop 13
Is grounded. One output terminal Q of the flip-flop 13 is connected to the base of a transistor T10 whose emitter is grounded, and the collector of the transistor T10 is connected to the base of the transistor T9. The base of the transistor T9 is connected to the power supply voltage terminal Vo via the resistor R9.

Next, the operation procedure based on this control circuit is shown below.

When a high level (H) signal is input to the clock terminal CK of the flip-flop 13, the output of the output terminal Q of the flip-flop 13 becomes the H level state and the transistor T10
Is on, the transistor T9 is off, and the manual drive circuit 8 is stopped. When a high level (H) signal is input to the reset terminal R of the flip-flop 13, the output of the output terminal Q of the flip-flop 13 becomes L.
Since the transistor T10 is turned off and the transistor T10 is turned off, the transistor T9 is turned on and the manual drive circuit 8 becomes operable.

When an operation signal is input from the automatic operation switch 3 to the CPU2, the CPU2 waits until each pulse value stored at that time is reached.
Thus, the motors 5 and 6 are drive-controlled, and the automatic regeneration operation is performed. When the manual operation switch 4 is operated, the output of the AND circuit 11 becomes L level and the output of the knot circuit 12 becomes H level. At this time, since the automatic drive signal is not output, the output of the OR circuit 9 is at L level, the output of the output terminal Q of the flip-flop 13 is at L level, the transistor T9 is turned on, and the manual drive circuit is turned on. 8 becomes the operable state, and the manual operation is performed according to the state of the manual operation switch 4.

Next, when the manual operation switch 4 is operated during the automatic reproduction, the L level signal is input to one of the input terminals of the AND circuit 11, so that the output of the AND circuit 11 becomes the L level.
The H level output of the knot circuit 12 is input to the AND circuit 10, and the H level output of the OR circuit 9 is input to the AND circuit 10 during the automatic control as described above. The output is input to the clock terminal CK of the flip-flop 13, and the H-level signal is output from the output terminal Q of the flip-flop 13. Therefore, the transistor T10 is turned on and the transistor T9 is turned off, so that the manual drive circuit 8 is stopped.

Then, by returning the contact made by the manual operation switch 4 to the separated state, a signal changing from the L level of the output signal of the AND circuit 11 to the H level is input to the reset terminal R of the flip-flop 13, and the flip-flop 13 Is reset. Therefore, the transistor T9 is turned on, the manual drive circuit 8 becomes operable, and the manual operation can be performed according to the subsequent operation of the manual operation switch 4.

In this way, the transistor T9 is turned off only when the manual operation switch 4 is operated during the automatic regeneration operation, so that it is possible to prevent the continuous manual operation during the automatic regeneration operation. Further, when a plurality of contacts of the manual operation switch 4 are turned on at different timings, the driving operation is stopped when the switches are first turned on, and the manual operation cannot be performed unless all the contacts are returned to the separated state. Function is realized.

[Effects of the Invention] As described above, according to the present invention, automatic and manual controls can be selectively performed, and when an operation for turning on a manual operation switch is performed during automatic control, When the automatic control is stopped and the manual control is also stopped, the manual control becomes operable by turning the switch off and then on again. It is possible to prevent the manual operation from being continuously performed, and to improve the operability.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a control circuit for an automobile power seat to which the present invention is applied. 1 ... Control circuit, 2 ... CPU, 3 ... Automatic switch, 4
...... Manual switch, 5,6 ...... Motor, 7 ...... Automatic drive circuit, 8 ...... Manual drive circuit, 9 ...... Or circuit, 10 ...... And circuit, 11 ...... And circuit, 12 ...... Knot circuit, 13…
…flip flop

Claims (1)

[Claims] 1. An automatic drive circuit for driving a motor by inputting an ON signal of the automatic operation switch, and the automatic drive circuit provided in parallel so as to drive the motor according to an ON state of a manual operation switch. A manual drive circuit, means for controlling one of the drive circuits to an operable state according to the state of each switch, and the manual operation switch turned on during operation of the automatic drive circuit. Occasionally, the automatic drive circuit is stopped and the means drive circuit is stopped once, and when the manual operation switch is once turned off and then turned on again, the manual drive circuit is turned on. And a control means for the motor.