JP2575739Y2 - Motor control device for in-vehicle equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor control device for a vehicle-mounted device using a motor such as a remote control type corner pole.

[0002]

2. Description of the Related Art As such, a vehicle battery is used.
An ignition switch and a motor drive circuit connected in series, a control circuit for generating a forward or reverse current in the motor drive circuit for a predetermined time, and a control circuit connected between the ignition switch and the control circuit to control the control circuit. Some of them include a control switch for operating. The motor drive circuit includes a first relay connected to one of the bipolar terminals of the motor, and a second relay connected to the other terminal of the motor. The control circuit is configured by an IC logic circuit, and is controlled when a control switch is turned on. The first relay is closed for a period of time to supply a forward rotation current to the motor, and thereafter, when the control switch is turned off, the second relay is closed for a predetermined period of time to supply a reverse rotation current to the motor.

[0003]

However, in the case of the above-mentioned known example, since an IC logic circuit is employed for the control circuit, the current consumption by the IC is required even after the ignition switch is turned off, and this is always performed by the battery. Must be supplied from the battery, which sometimes causes the battery to run out.
Therefore, it has been desired to eliminate such current consumption. The present application fulfills such a demand.

[0004]

In order to solve the above-mentioned problems, a motor control device for a vehicle-mounted device according to the present invention comprises an ignition switch and a motor drive circuit connected in series to a vehicle-mounted battery; In a motor control device for a vehicle-mounted device having a control circuit for generating a current in the reverse direction for a predetermined time and a control switch connected between an ignition switch and the control circuit for performing a predetermined operation of the control circuit, A first relay connected to one of the bipolar terminals of the motor and a first FET element for controlling the opening and closing of the first relay; and a second relay connected to the other terminal of the motor and a second FET element for controlling the opening and closing of the second relay. When the ignition switch and the control switch are simultaneously turned on as a control circuit, the first FET element is turned on. A first timer circuit for supplying a current in the forward direction to the motor by closing the first relay for a predetermined time by turning on the first FET, and then turning on the second FET element when at least one of the ignition switch and the control switch is turned off. a second timer circuit for co-feeding a current in the reverse direction to the motor closes the second relay a predetermined time by the first timer
The circuit and the second timer circuit are formed separately from each other, and the
1 timer circuit closes the first relay with the time constant during charging
Time and the time constant
It is possible to discharge more quickly than the predetermined time, and the second timer
-Circuit is to close the second relay with the time constant at the time of discharge
And the predetermined time determined by this time constant
It is characterized by being able to charge faster than time . Note that the FET element refers to a known field-effect transistor.

[0005]

When the control switch is turned on while the ignition switch is turned on, the first FET element is turned on for a predetermined time by the first timer circuit to close the first relay, and forward current is supplied to the motor in the forward direction. Let it.
Thereafter, when the ignition switch or the control switch is turned off, the second FET element is turned on by the second timer circuit, the second relay is closed for a predetermined time, and a reverse current is supplied to the motor to reverse the motor. Also,
No current is consumed after the ignition switch or the control switch is turned off. In addition, the first timer circuit
The predetermined time for closing the first relay is determined by the time constant during charging.
More quickly than the time determined by this time constant
Discharge is enabled, and the second timer circuit is fixed at the time of discharge
To secure a predetermined time to close the second relay
It will be possible to charge faster than the time determined by this time constant.
You.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. FIG. 1 is a circuit diagram of a motor control device for a remote-control corner pole for a vehicle according to an embodiment, and FIG. 2 is a time chart thereof.

First, in FIG. 1, an ignition switch IG.SW and two power supply lines L are connected to a vehicle battery BAT.
The motor drive circuit 1 is connected via N1 and LN2.
The motor drive circuit 1 is provided with a first FET element Q1 and a second FET element Q2 as switch elements for opening and closing the first relay RL1 and the second relay RL2.

The control circuit 2 is connected to the ignition switch IG. SW via a control switch CONT. SW. The control circuit 2 includes a first timer circuit 3 connected to the first FET element Q1, a second timer circuit 4 connected to the second FET element Q2, and a transistor circuit 5.

The power supply line LN1 is connected to the power supply terminals 6 and 7 of the first relay RL1 and the second relay RL2 in parallel. Of the bipolar terminals 8 and 9 of the motor M, the movable contact 10 to which one terminal 8 is connected and the movable contact 11 to which the other terminal 9 is connected are connected to the ground contacts 12 and 13 in the normal state.

One end of the power supply line LN2 is connected to the cathode of a diode D1 having an anode connected to the battery BAT, and one end of each of the coils L1 and L2 of the first relay RL1 and the second relay RL2 is connected to the other end. Connected to. The other ends of the coil L1 and the coil L2 are the first FE
It is connected to each drain side of the T element Q1 and the second FET element Q2.

[0011] The first relay RL1 is connected to the first FET element Q1.
Is turned on by exciting the coil L1 that is energized by the turn-on and connecting the movable contact 8 to the power supply side terminal 6. Further, the second relay RL2 is turned on by exciting the coil L2 energized by turning on the second FET element Q2 and connecting the movable contact 9 to the power supply terminal 7. First relay RL1 and second relay RL
As for 2, as described later, only one of them is turned on, and both are not turned on at the same time.

The gate of the first FET element Q1 is connected to the control circuit 2
, And the source is grounded. The drain is a Zener diode ZD2.
Are connected, and the anode is grounded. The Zener diode ZD2 is provided for the high voltage generated when the current flowing through the coil L1 is cut off,
It is intended to protect the first 1FET element Q1 against a surge voltage from the AT side, for example, vehicle battery BAT 12
At V, the Zener voltage is set to about 27V .

The gate of the second FET element Q2 is connected to the control circuit 2
, And the source is grounded. The drain is a Zener diode ZD3.
Are connected, and the anode is grounded. Zener diode ZD3 is set in the same manner as Zener diode ZD2 to protect second FET element Q2.

A resistor R7 and a capacitor C3 are connected between the bipolar terminals 8 and 9 of the motor M in parallel with the motor M. The resistor R7 and the capacitor C3 are in series, the capacitor C3 is for removing noise, and the resistor R7 is for the capacitor C3.
3 for current control. The motor M is for extending and contracting a remote control type corner pole (not shown) by rotating forward and backward. Hereinafter, rotation in the direction of extending the corner pole is referred to as forward rotation, and rotation in the direction of contraction is referred to as reverse rotation.

A control switch CONT. SW is connected in series to the ignition switch IG. SW. Control switch CO
When the ignition switch IG.SW is turned on and the control switch CONT.SW is closed, the NT.SW rotates the motor M forward for a predetermined time to extend the corner pole, and the ignition switch IG. While the SW and the control switch CONT. SW are ON at the same time, keep the corner pole extended, and then turn off at least one of the ignition switch IG. SW or the control switch CONT. SW to reverse the motor M. To shorten the corner pole.

The control switch CONT. SW has a diode D2.
Are connected. The cathode of the diode D2 is connected to the resistor R1 , and the other end of the resistor R1 has a Zener diode ZD, the first timer circuit 3 of the control circuit 2,
The timer circuit 4 and the transistor circuit 5 are respectively connected in parallel. Incidentally, the Zener diode ZD1 is for constant voltage, a cathode connected to the resistor R1 Yes grounds the anode, for example, vehicle battery BAT is 12V Noto
The voltage fluctuating before and after the current is stabilized at about 9V.

The first timer circuit 3 has an anode connected to a resistor R1.
, A diode D3 for preventing backflow, an electrolytic capacitor C1 connected in parallel with the cathode and a resistor R3.
2. A resistor R connected in series with the electrolytic capacitor C1
3, a resistor R4 and a diode D4 connected to the electrolytic capacitor C1 in parallel with the resistor R3. The diode D4 has a cathode connected to the electrolytic capacitor C1 and an anode grounded. One end of each of the resistors R2 and R4 is grounded, and a first terminal is provided between the resistors R3 and R4.
The gate of FET element Q1 is connected.

The electrolytic capacitor C1, the resistor R3 and the resistor R4 form a differentiating circuit, and include an ignition switch IG.
When the SW and the control switch CONT.SW are turned on, a voltage is applied to the gate of the first FET element Q1 for a predetermined time T required for charging determined by the time constant of this differentiating circuit. The electrolytic capacitor C1 and the resistor R
The discharge time of the electrolytic capacitor C1 is determined by the time constant determined by 2, and the discharge time is set so as to enable a rapid discharge shorter than a predetermined time T required for charging.

The second timer circuit 4 connects the anode to a resistor R1.
, A reverse-current preventing diode D5, an electrolytic capacitor C2 and a resistor R connected in parallel to the cathode.
5, consisting of a resistor R6. Electrolytic capacitor C2 has one electrode connected to the cathode of diode D5 and the other electrode grounded. One end of the resistor R6 is also grounded, and the gate of the second FET element Q2 is connected between the resistor R5 and the resistor R6.

The electrolytic capacitor C2, the resistors R5 and R6 are connected to an ignition switch IG.SW and a control switch C.
After turning on the ONT. SW, the ignition switch IG. S
When at least one of the control switch W and the control switch CONT.SW is turned off, a voltage is applied to the gate of the second FET element Q2 for a predetermined time T required for discharge determined by the time constant of this circuit. Electrolytic capacitor C2
Is shorter than a predetermined time T required for discharging, and is set so that rapid charging is possible.

The predetermined time T is set as an operation time required for the motor M to extend and retract the corner pole.

The transistor circuit 5 has a common emitter NP
It comprises an N-type transistor Q3, a resistor R8 connected between the base and the resistor R1, and a resistor R9 connected between the base and the emitter. The collector of the transistor Q3 is connected between the resistor R6 and the gate of the second FET element Q2. Have been. The transistor Q3 is an ignition switch IG. SW
SW and the control switch CONT. SW are always turned on while the second FET element Q2 is kept off, and at least the ignition switch IG.
The second FET is turned off at the same time as one of the NT.SW is turned off, and only during the predetermined time T when the electrolytic capacitor C2 is discharged.
This allows the element Q2 to be turned on.

For this reason, the first FET element Q1 is connected to the first relay under an AND condition only for the first predetermined time T after the ignition switch IG.SW and the control switch CONT.SW are both turned on and the control switch CONT.SW is turned on. RL1
Is turned on, and the second FET element Q2 is turned off by the ignition switch IG. SW or the control switch CONT. SW.
The second relay RL2 is turned on for a predetermined time T under the R condition. Therefore, the first relay RL1 and the second relay RL2 are not simultaneously closed.

Therefore, when the first relay RL1 is in the closed state, the second relay RL2 is in the open state, so that the current of the motor M is applied to the movable contact 8 connected from the power supply terminal 6 of the first relay RL1. The forward rotation current flows to the ground contact 13 of the second relay RL2. Also, the second relay R
When L2 is in the closed state, the first relay RL1 is in the open state, and the current of the motor M is supplied to the power supply terminal 7 of the second relay RL2.
Through the movable contact 9 connected to the first relay RL1
The reverse current flows to the ground contact 12 of FIG.

The following table shows the relationship between the operation of each switch and the rotation of the motor and the operation of the corner pole.

【table】

Next, the operation of this embodiment will be described. In FIG. 2 and the above table, first, an ignition switch
The FET element Q1 which turns on the control switch CONT. SW with the IG. SW turned on turns on due to the rise of the gate voltage, and the first relay RL1 is closed for a predetermined time T.
On the other hand, the second FET element Q2 remains off, and the second relay RL2 is open. Therefore, a forward rotation current is generated in the motor drive circuit 1 from the first relay RL1 through the motor M to the second relay RL2, and the motor M rotates forward to extend the corner pole.

Since the charging current of the electrolytic capacitor C1 gradually decreases thereafter, the gate voltage of the first FET element Q1 gradually decreases, and a predetermined time T when the corner pole is extended.
When but elapses, the gate voltage of the first 1FET element Q1 falls below the cut-off voltage V _H, first 1FET element Q1 forward current is stopped by turning off the motor M also stops rotating.

Even if the first FET element Q1 is turned off,
Ignition switch IG. SW and control switch CONT. SW
Is on, the second FET element Q2 is also kept off, so that the motor M does not reverse and the corner pole remains extended.

Then, when either the ignition switch IG. SW or the control switch CONT. SW is turned off, Q3
Is turned off, the second FET element Q2 is turned on this time by the voltage charged in C2, and the second relay RL2 is closed. However, since the first relay RL1 is in the open state, a reverse rotation current is generated in the motor drive circuit 1 from the second relay RL2 to the first relay RL1 through the motor M,
The motor M reverses and contracts the corner pole.

Thereafter, the gate voltage of the second FET element Q2 gradually decreases as the electrolytic capacitor C2 discharges,
When the predetermined time T has passed a corner pole as possible shrinkage, the gate voltage of the 2FET element Q2 falls below the cut-off voltage V _H, first 2FET element Q2 is reversed current is stopped off, the motor M also stops rotating.

As shown simultaneously in FIG. 2, while the motor M is rotating, for example, during normal rotation, a short time T ₁ (T ₁ <
T), the ignition switch IG. SW or the control switch CONT. SW is turned off, followed by a short time T ₂ (T ₂ <T).
Only ignition switch IG. SW and control switch CO
Turn the NT.SW back on and then switch on the ignition switch I
When the G. SW or the control switch CONT. SW is turned off, the motor M temporarily reverses by T ₁ during normal rotation, then turns forward by T ₂ , and then reverses for a predetermined time T to shorten the corner pole. Cut.

As described above, even when the motor M is rotated in the reverse direction during rotation, when the corner pole is finally contracted, the reverse current of the motor M can be secured for a predetermined time T because the electrolytic capacitor C1 is rapidly discharged. And the electrolytic capacitor C2 is rapidly charged.

As is apparent from the above table, the condition for extending the corner pole, that is, the normal rotation condition of the motor M is determined by the ignition switch IG.SW and the control switch CO.
NT.SW is turned on at the same time. The condition for reducing the corner pole, that is, the reverse rotation condition of the motor M, is that at least one of the ignition switch IG.SW and the control switch CONT.SW is turned off.

According to this embodiment, the first and second switch elements of the first relay RL1 and the second relay RL2 are
Since the FET elements are used and controlled by the first and second timer circuits, it is possible to eliminate current consumption after turning off the ignition switch IG.SW, and thus prevent the battery from running out. In addition, the structure can be simplified and manufactured at low cost.

The present invention is not limited to the above embodiment, but can be applied to various in-vehicle devices such as electric antennas.

[0036]

[Effect of the invention] The present invention includes first and second 2FET element as a switching element for controlling opening and closing the first relay and the second relay in the motor drive circuit, and a control circuit, the ignition switch and the control switch When turned on at the same time, the first FET element is turned on to close the first relay, thereby supplying a current in the forward direction to the motor for a predetermined time, and thereafter, either the ignition switch or the control switch is turned off. Then, a second timer circuit for turning on the second FET element, closing the second relay for a predetermined time, and supplying a reverse current to the motor is provided.

Therefore, the first alternative to the conventional IC logic circuit
And the use of the second FET element and the first and second timer circuits, the ignition switch or control switch required in the conventional IC logic circuit .
The current consumption after the switch is turned off can be eliminated, and the battery can be prevented from running out. Moreover, the structure is simple and relatively inexpensive to manufacture. Sou
The first timer circuit activates the first relay with the time constant during charging.
While securing a predetermined time for closing, this time constant
It is possible to discharge more quickly than the fixed time
The timer circuit is used to close the second relay with the time constant at the time of discharge.
Secure the predetermined time and the time determined by this time constant
Battery can be charged quickly,
A short time to rotate in the opposite direction within a time shorter than the time constant
Even if the switch is operated, the first timer
Road or the constant set in the second timer.
A predetermined time can be ensured.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a motor control device according to an embodiment.

FIG. 2 is a time chart in the motor control device of the embodiment.

[Explanation of symbols]

IG. SW: Ignition switch, CONT. SW: Control switch, RL1: First relay, RL2: Second relay, Q
1: first FET element, Q2: second FET element, 1: motor drive circuit, 2: control circuit, 3: first timer circuit,
4: second timer circuit, 5: transistor circuit, M: motor

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02P 5/04-5/26 H02P 7/04-7/34

Claims (1)

(57) [Scope of request for utility model registration] An ignition switch and a motor drive circuit connected in series to a vehicle-mounted battery, a control circuit for generating a forward or reverse current for a predetermined time in the motor drive circuit, and a control circuit between the ignition switch and the control circuit. A motor control device for an in-vehicle device, comprising: a control switch connected to the motor for performing a predetermined operation of the control circuit. The motor drive circuit comprises: a first relay connected to one of the bipolar terminals of the motor; 1 FET
A second relay connected to the other terminal of the motor, and a second FET element for controlling the opening and closing of the second relay. The control circuit turns on the first FET element when the ignition switch and the control switch are simultaneously turned on. A first timer circuit that closes the first relay for a predetermined time and supplies a current in the forward direction to the motor; and then turns on the second FET element when at least one of the ignition switch and the control switch is turned off. A second timer circuit for closing the second relay and supplying a reverse current to the motor , wherein the first timer circuit and the second timer circuit are separately provided;
And the first timer circuit activates the first relay with a time constant during charging.
While securing a predetermined time for closing, this time constant
It is possible rapidly discharged than a predetermined time determined, the second relay in the second timer circuit time constant during discharge
While securing a predetermined time for closing, this time constant
A motor control device for an in-vehicle device , which can be charged more quickly than a predetermined time .