JPS6251078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of controlling a motor of a device that drives a motor by rotating it forward or backward, such as a power window of an automobile, a power antenna, or the like.

Automotive power windows, power antennas, etc. are operated by rotating a drive motor in the forward or reverse direction by switching a switch.

FIG. 4 shows an example of a control circuit for a drive motor of a conventional device, in which a power source E is connected to a drive motor M via relay contacts La and Lb for polarity switching. Relay contacts La and Lb can be switched by operating the control circuit and have the following configuration. That is, the contact point MF that allows the forward rotation of the drive motor M to be obtained manually and the contact point that is obtained automatically.
A control switch equipped with a contact point MR that manually controls the reverse rotation of AF and the drive motor M, and a contact point AR and neutral N that automatically controls the reverse rotation of the AF and drive motor M.
For example, when a switch is applied to contact MF, relay LA is energized via OR gate G-1, and by switching the relay contact La, drive motor M is rotated in the forward direction. At this time, the drive motor M rotates while the contact MF is closed, and stops when the switch is returned to neutral N.
In addition, when contact AF is applied, hold circuit H-1 is activated and memorized, and its output is gate G-1.
1, the relay LA is excited and the relay contact La is switched to obtain forward rotation of the drive motor M. In this case, the drive motor continues to rotate even if the switch leaves contact AF, and the reset circuit is activated by the limit signal obtained when the motor stops rotating.
RT acts to release the hold of the hold circuit H-1.

When the drive motor M is rotated, for example, when used for power windows, the power is used to open and close the window, and the contact MF is used to open the window as much as necessary.
AF is used when the camera is fully opened.

Note that when the contacts MR and AR are turned on, the relay LB is energized, and the contact Lb is switched to obtain a reverse rotation action of the drive motor. OR gate G-2 and hold circuit H-2 used in this case
The effect of is the same as in the previous explanation.

In this way, the initial purpose can be achieved with a conventional control device, but since the control switch has multiple contacts, it is easy to make mistakes in operation, and the special switch structure prevents the use of general commercially available switches. However, there are disadvantages such as the high cost and extremely complicated wiring.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a control switch with a simple structure, to facilitate switch operation, and to freely process signals generated by switch operation to accurately control a drive motor. be.

This inventive device will be explained in detail below.

FIG. 1 shows a block diagram of the device according to the invention, where M is a drive motor that opens and closes a car window or moves an antenna up and down, and E
is a power supply, La and Lb are relay contacts that switch the rotation direction of the drive motor M, and LA and LB are relay coils. In this example, when the relay coil LA is excited, the relay contact La switches to switch the rotation direction of the drive motor M. When directional rotation is obtained and the relay coil LB is energized, the relay contact Lb is switched so that the drive motor M can rotate in the opposite direction.

D-1 is a D-type flip-flop circuit, and its output Q is sent to the relay coil via the buffer circuit B-1.
LA is connected to the clock input terminal CK.
In this case, a signal is obtained from contact SW ₁ of a control switch for rotating the drive motor M in the forward direction.

D-2 is a D-type flip-flop circuit whose output Q is sent to a relay coil via a buffer circuit B-2.
LB is connected to the clock input terminal CK.
In this case, a signal is obtained from contact SW ₂ of a control switch for rotating the drive motor M in the opposite direction.

RC is a reset circuit that has the function of sending an initial reset signal to the D-type flip-flop circuits D-1 and D-2, and its output is held at level "H" before receiving a signal at the clock input terminal CK. It is designed so that it will be done.

Y-1 and Y-2 are delay circuits, and as will become clear later in the explanation, this action occurs when a continuous pulse signal is applied for some reason when contact SW ₁ or SW ₂ of the control switch is operated. However, it has the effect of preventing the D-type flip-flop circuit from operating immediately.

Further, the output of the D-type flip-flop circuit D-1 is supplied to the data input terminal D of the D-type flip-flop circuit D-2 via the delay circuit Y-1, and the output of the D-type flip-flop circuit D-2 is supplied to the data input terminal D of the D-type flip-flop circuit D-2. -2 to the data input terminal D of the D-type flip-flop circuit D-1. Therefore, in the initial state of any D-type flip-flop circuit, the level of the data input terminal D is in the "H" state, and by turning on either contact SW ₁ or SW ₂ of the control switch, the drive motor M can be turned on. It is possible to start.

MS is a protection circuit for the drive motor M, which has the function of preventing further energization when the rotation of the motor M is stopped by mechanical means, for example when the window is completely closed or completely opened, and has a reset function. A signal is sent to the circuit RC, thereby placing each D-type flip-flop circuit in a reset state and cutting off the power to the drive motor M.

Therefore, if power E is turned on and contact SW ₁ of the control switch is turned on by manual operation, the output Q of D-type flip-flop D-1 will be
The level becomes "H". As a result, buffer circuit B
-1, the relay coil LA is excited, the relay contact La is switched, and the drive motor M starts rotating in the forward direction. If left as is, the protection circuit MS will be activated when the drive motor M stops rotating, for example when the window is completely open or closed, and a reset signal will be sent to the D-type flip-flop circuit D-1 through the reset circuit RC. Therefore, the power supply to the drive motor M is automatically stopped.

If you want to stop the rotation of the drive motor M before the rotation reaches the above point, just close contact SW ₂ of the control switch, and this will cause the reset circuit RC to stop.
As a result, a reset signal is sent to the D-type flip-flop circuit D-1, and its Q output is inverted to the level "L", so that the energization to the relay coil LA is stopped. At this time, an input signal is also applied to the clock input terminal CK of the D-type flip-flop circuit D-2 by operating contact SW ₂ of the control switch, but since the level of the data input terminal D is "L", the drive motor M is No output is sent out for reverse rotation.

If the drive motor M is to be rotated in the opposite direction, the contact SW ₂ of the control switch may be turned on in the same manner, and if this operation is to be stopped, the contact SW ₁ of the control switch may be turned on.

Note that if any of the contacts of the control switch are turned on twice in succession when stopping the drive motor M, the motor will normally stop at the first signal, and the motor will rotate in a different direction from the first signal at the next signal. However, in the device of the present invention, such a problem is prevented by the action of the delay circuits Y-1 and Y-2. That is,
There is no malfunction due to chattering of the control switch contacts SW ₁ and SW ₂ .

Figure 2 shows an example of the circuit of this invention, except that the start switch for control is indicated by S.
The numbers match those in the example in the figure.

If the control switch S is such an automatic reset type switch, the wiring can be significantly simplified, and a special specification switch is not required as in the conventional device.

In this example, when the power supply E is applied, a charging current flows through the capacitor _C1 of the reset circuit RC, resulting in a voltage drop across the resistor _R1 , and this potential is used to reset the D-type flip-flop circuits D-1 and D-2. An initial reset operation is being performed. This potential decreases as capacitor _C1 charges, so
It does not continue as a reset signal.

When the rotation of the drive motor M stops, for example, when the window is completely opened or closed, the relay as the protection circuit MS is energized by the overcurrent and closes its contact MS-1. Since _C2 is charged and the potential of this terminal rises, the D-type flip-flop circuits D-1 and D-
It acts as a reset signal of No. 2 and stops the power supply to the drive motor M.

FIG. 3 is a time chart showing the operation of the example shown in FIG. 2, in which the D-type flip-flop circuits D-1 and D-2 are activated by the initial reset signal generated when the power source E is turned on. By resetting and turning switch S to one side, the output of D-type flip-flop circuit D-1 is reversed and drive motor M
We get a positive rotation of . When the switch S is turned on to the other side, the rotation is stopped, and when the switch S is turned on again, the rotation in the opposite direction is started.

As is clear from the above description, this invention allows the drive motor to be rotated in the forward or reverse direction, and even stopped, by switching a two-contact switch.
The operation of the switch is significantly simplified,
Moreover, this makes the wiring connection easier, and since no special switch is required, commercially available parts can be used as they are, resulting in high compatibility.

In addition, a D-type flip-flop circuit is used to control the drive motor, and the initial reset is performed when the power is turned on, so there is no malfunction, and even if chattering occurs due to a switch operation error. The output from this circuit is cut off, and when one flip-flop circuit operates, its output is used to reset the other flip-flop circuit, making it extremely reliable, for example in automobiles. It can be effectively used for controlling a power window or a power antenna.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the inventive device, FIG. 2 is a circuit diagram thereof, FIG. 3 is a time chart, and FIG. 4 is a block diagram of a conventional device. D-1, D-2: D-type flip-flop, B-
1, B-2: Buffer circuit, LA, LB: Relay coil, La, Lb: Relay contact, Y-1, Y-2:
Delay circuit, RC: Reset circuit, MS: Protection circuit,
M: Drive motor, S: Control switch.

Claims (1)

[Scope of Claims] 1. A control device in which a control switch operation signal is processed in a control unit to rotate or stop a drive motor in the forward or reverse direction, comprising: an automatic return type two-contact SW ₁ , _SW2 , a D-type flip-flop circuit D-1 which receives a signal from one contact _SW1 at its clock input terminal and sends out a positive direction rotation signal for the drive motor, and the other contact _SW2. When the D-type flip-flop circuit D-2, which receives a signal from the D-type flip-flop circuit D-2 at its clock input terminal and sends out a reverse rotation signal for the drive motor, and any of the contacts mentioned above,
a reset circuit that supplies a reset signal to the reset terminal of the D-type flip-flop circuit that does not correspond to the contact; and a delay circuit that is connected between the data input terminal of one of the two D-type flip-flop circuits and the output terminal of the other. A control device for a drive motor, comprising: a protection circuit that detects mechanical stoppage of the drive motor and sends a reset signal to reset terminals of both flip-flop circuits through the reset circuit.