JPH05199780A - Motor controller - Google Patents

Abstract

PURPOSE:To simplify circuit configuration within a switching means by actuating a drive circuit in the direction of current flowing onto a signal line of transmission signal from the switching means with its voltage level. CONSTITUTION:A motor controller 1 assembles a current detection circuit 3 and a drive circuit 4 to a motor 20 in one piece and then mounts them on a door 22 and at the same time mounts a switching means 2 on the arm rest part of the door 22 since a signal line 4 is a single wire for transmitting current. Then, when a movable contact (PP) 2c is allowed to contact a ground-side fixed contact 2b, current flows from a contact point 5a to PP 2c at the signal line 5 and then the output of a differential amplifier(AM) 3b becomes a high level(H), the output of AM 3c becomes a low level(L), an output signal line(OS) 7 becomes L and OS 6 becomes H, thus enabling the motor 20 to be rotated in forward direction. Then, when the PP 2c is allowed to contact a power supply side fixed contact 2a, current flows from PP 2c to a connection point (a) at the signal line 5, the output of AM 3b becomes L, that of AM 3c becomes H, OS 6 becomes L, and then OS 7 becomes H, thus enabling the motor 20 to be rotated.

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 used for starting and stopping a motor for raising and lowering a windshield of an automobile.

[0002]

2. Description of the Related Art Conventionally, as a motor control device for starting and stopping a motor for raising and lowering a windshield of an automobile, one disclosed in Japanese Patent Application Laid-Open No. 1-152980 is known.

The motor control device described in the above publication is
The elevator switch operation part provided on the armrest part of the driver's door is equipped with a door glass up / down switch and a level value setting circuit, and outputs the output voltage corresponding to the operation of each door glass up / down switch via a resistor. The power window motor is energized by setting a predetermined level by the level value setting circuit and determining the level by the controller.

[0004]

However, in the above-mentioned conventional motor control device, since the door switch raising / lowering switch and the level value setting circuit are provided in the raising / lowering switch operation portion, the door glass raising / lowering switch and the level value setting circuit are provided. There is a problem in that the number of signal lines connecting between and increases, which complicates the circuit in the lifting switch operating unit.

[0005]

The problem to be solved by the invention is that if the level value setting circuit is provided in the switch at the driver's door armrest, the circuit inside the switch becomes complicated.

[0006]

[Constitution of Invention]

[0007]

A motor control device according to the present invention is a motor control device for driving a motor in a forward rotation or a reverse rotation in order to simplify a circuit in a switch in a driver's door armrest part. A switch means in which the movable contact is connected to a power source or a ground by a manual operation, a signal line connected to the movable contact, and a current flowing in the signal line is in a first direction and has a predetermined level value or more. Current detection circuit for generating a second output signal when the current flowing in the signal line is in the second direction and is equal to or higher than a predetermined level value. And a drive circuit for rotating the motor in the forward rotation direction by the first output signal from the current detection circuit and rotating the motor in the reverse rotation direction by the second output signal. In a more preferred embodiment, the current detection circuit has a first, a second, a third, and a fourth resistor connected in series between the power supply and the ground, and a reference for generating the reference voltage. A voltage generation circuit, a first differential amplifier to which the voltage at the connection point of the first and second resistors and the reference voltage of the reference voltage generation circuit are input, and a connection point of the third and fourth resistors And a second differential amplifier to which the reference voltage of the reference voltage generating circuit is input. In a more preferred embodiment, the current detection circuit is connected in series between the power supply and ground. A first, a second, a third, and a fourth resistor connected to each other, a reference voltage circuit for generating a reference voltage, and a base at a connection point of the first and second resistors, and a reference voltage generating circuit of the reference voltage generating circuit. The first transistor with the emitter connected to the reference voltage generation point And a second transistor having a base connected to the connection point of the third and fourth resistors and an emitter connected to the reference voltage generation point of the reference voltage generation circuit, which is more preferable. The embodiment is characterized in that the current detection circuit and the drive circuit are integrally assembled to the motor, and by simplifying the circuit in the switch of the driver's seat door armrest part, a useless circuit is eliminated. It was omitted, and the purpose of reducing the size of the switch was realized.

[0008]

In the motor control device according to the present invention, the level value setting circuit is provided in the switch means in order to operate the drive circuit according to the direction of the current flowing through the signal line of the transfer signal transferred from the switch means and the voltage level thereof. The circuit configuration in the switch means does not become complicated as compared with that provided.

[0009]

1 and 2 show an embodiment of a motor control device according to the present invention.

The illustrated motor control device 1 is mainly composed of a switch means 2, a current detection circuit 3 and a drive circuit 4.

The switch means 2 has a power source side fixed contact 2a,
The ground side fixed contact 2b and the movable contact 2c are provided, the power source side fixed contact 2a is connected to the power source VB, the ground side fixed contact 2b is connected to the ground, and the movable contact 2c is connected to the signal line 5.

The current detection circuit 3 has first, second, third and
The fourth resistor R1, R2, R3, R4, the reference voltage generating circuit 3a, the first differential amplifier 3b, and the second differential amplifier 3c are provided.

First, second, third and fourth resistors R1 and R
2, R3 and R4 are connected in series between the power source VB and the ground, and the signal line 5 is connected to the connection point a between the second resistor R2 and the third resistor R3.

The connection point b between the first resistor R1 and the second resistor R2 is connected to the negative input side of the first differential amplifier 3b, and the third resistor R3 and the fourth resistor R4 are connected. The connection point c is connected to the positive input side of the second differential amplifier 3c.

The reference voltage generating circuit 3a is provided with resistors r5 and r6 connected in series between the power source VB and the ground, and the connection point d (reference voltage generating point) of the resistors r5 and r6 is the first. It is connected to the positive input side of the first differential amplifier 3b and the negative input side of the second differential amplifier 3c.

The output side of the first differential amplifier 3b is connected to the output signal line 6, and the output side of the second differential amplifier 3c is connected to the output signal line 7.

Here, the first, second, third and fourth resistors R
1, R2, R3, R4 resistance values R1a, R2a, R3
a and R4a are set to R1a + R2a = R3a + R4a.

Further, the resistance r5 of the reference voltage generating circuit 3a
Since the resistance values r5a and r6a of r6 are set to r5a = r6a, the value of the voltage Vref applied to the connection point d is And the voltage Vm at the connection point a due to the current ix flowing at the connection point a becomes And the voltage Vα at the connection point b is And the voltage Vβ at the connection point c is Becomes

As a result, as is clear from FIG.
Since Vm = Vref when ix = 0, Vα
> Vref, the output side of the first differential amplifier 3b becomes low level, and since Vβ <Vref, the output side of the second differential amplifier 3c becomes low level, and the output signal line 6, All 7 are low level.

When ix <-iα, that is,
When the current flows from the connection point a to the movable contact 2c of the switch means 2 in the first direction, Vα <Vref, so that the output side of the first differential amplifier 3b is at a high level (first output). Signal) and Vβ <Vref, the output side of the second differential amplifier 3c becomes low level, the other output signal line 7 becomes low level, and one output signal line 6 becomes high level.

Further, when ix> iβ, that is, in the second direction in which current flows from the movable contact 2c of the switch means 2 toward the connection point a, Vα> Vref
Therefore, the output side of the first differential amplifier 3b becomes a low level, and Vβ> Vref, so that the output side of the second differential amplifier 3c becomes a high level (second output signal).
Then, one output signal line 6 becomes low level and the other output signal line 7 becomes high level.

Since the output signal line 6 of the first differential amplifier 3b has a high level, this output signal is used for forward rotation, and the output signal line 7 of the second differential amplifier 3c has a high level. Therefore, this output signal is used for reverse rotation.

On the other hand, the drive circuit 4 includes a resistor r8, a resistor r9 and a transistor T connected to the one output signal line 6.
r1, a forward rotation switching circuit 4a including a Zener diode ZD1, a relay RL having a relay coil rl1 connected in series between the power supply VB and the collector of the transistor Tr1, and a resistor r10 connected to the other output signal line 7. , A resistor r11, a transistor Tr2, a reverse rotation switching circuit 4b including a Zener diode ZD2, a relay RL having a relay coil rl2 connected in series between the power source VB and the collector of the transistor Tr2.
It consists of two. The movable contact rl1-1 provided in the relay RL1 is one brush terminal 20 provided in the motor 20.
a movable contact r that is connected to a and is provided in the relay RL2
l2-1 is the other brush terminal 20b provided in the motor 20.
It is connected to the.

Then, the movable contact rl1- of the relay RL1.
1 is from the earth side fixed contact rl1-2 to the power supply side fixed contact r
By switching to l1-3, the power source VB is supplied to one brush terminal 20a of the motor 20, and the movable contact rl2-1 of the relay RL2 is switched from the earth side fixed contact rl2-2 to the power source side fixed contact rl2-3. By changing, the power supply VB is supplied to the other brush terminal 20b of the motor 20.

On the other hand, the motor shaft 20c of the motor 20 is communicated with the window glass 23 of the door 22 through the elevating mechanism 21, and the window glass 23 is rotated by the motor shaft 20c rotating in the forward or reverse direction. Move down or up.

The motor control device 1 having such a structure
Since the signal line 5 from the switch means 2 to the current detection circuit 3 is a single line for current transfer, the current detection circuit 3 and the drive circuit 4 are integrally assembled with the motor 20 and installed in the door 22. The switch means 2 is attached to the armrest portion of the door 22.

Therefore, when the window glass 23 is in the fully closed position, the switch means 2 is switched to move the movable contact 2c.
Is brought into contact with the earth side fixed contact 2b, a current flows through the signal line 5 from the contact point a to the movable contact 2c, and the connection point b
Voltage Vα of V becomes less than Vα <Vref, and the voltage V of the connection point c
p <Vref.

Therefore, since the output signal line 7 of the second differential amplifier 3c becomes low level and the output signal line 6 of the first differential amplifier 3b becomes high level, the transistor Tr1 of the forward rotation switching circuit 4a. Is turned on and the relay coil rl1 of the relay RL1 is excited, so that the movable contact rl1-1 of the relay RL1 is switched to the power supply side fixed contact rl1-3 to supply the power supply VB to one brush terminal 20a of the motor 20. The shaft 20c is normally rotated.

When the motor shaft 20c rotates in the forward direction, the window glass 23 is moved to the lower side via the elevating mechanism 21, and the switching stop of the switch means 2 is stopped at the same time.

When the switch means 2 is switched from this state to bring the movable contact 2c into contact with the fixed contact 2a on the power source side, a current flows from the movable contact 2c to the connection point a in the signal line 5 and the connection point is reached. The voltage Vα of b becomes Vα> Vref, and the voltage Vβ of the connection point c becomes Vβ> Vref.

Therefore, the output signal line 6 of the first differential amplifier 3b becomes low level and the output signal line 7 of the second differential amplifier 3c becomes high level, so that the transistor Tr2 of the reverse rotation switching circuit 4b. Is turned on and the relay coil rl2 of the relay RL2 is excited, so that the movable contact rl2-1 of the relay RL2 is switched to the power supply side fixed contact rl2-3 to supply the power supply VB to the other brush terminal 20b of the motor 20. The shaft 20c is rotated in the reverse direction.

When the motor shaft 20c rotates in the reverse direction, the window glass 23 is moved to the ascending side via the elevating mechanism 21 and stopped at the same time when the switching of the switch means 2 is stopped.

FIG. 3 shows another embodiment of the motor control device according to the present invention. Since the other parts except the current detection circuit are constructed in the same manner as shown in FIG. 1,
The description is omitted.

The current detection circuit 3 in this case includes the first, second, third and fourth resistors R1, R2, R3 and R4, the reference voltage generation circuit 3a, the first transistor Tr3 and the second transistor. Tr4 is provided.

First, second, third and fourth resistors R1 and R
2, R3 and R4 are connected in series between the power source VB and the ground, and the signal line 5 from the switch means 2 is connected to the connection point e between the second resistor R2 and the third resistor R3. There is.

The connection point f between the first resistor R1 and the second resistor R2 is connected to the base of the first transistor Tr3, and the connection point g between the third resistor R3 and the fourth resistor R4.
Is connected to the base of the second transistor Tr4.

The emitter of the first transistor Tr3 and the emitter of the second transistor Tr4 are connected to the connection point h of the resistors r5 and r6 provided in the reference voltage generating circuit 3a.
(Reference voltage generation point) is connected, and the collector of the first transistor Tr3 and the collector of the second transistor Tr4 are connected to the output signal lines 6 and 7 to the drive circuit 4, respectively.

In the current detection circuit 3, the voltage level at the connection point f is lower than the voltage level at the reference voltage generation point h by a predetermined level, and the current flowing through the signal line 5 is from the connection point e to the movable contact of the switch means 2. When it is in the first direction toward 2c, the first transistor Tr3 is turned on to bring one output signal line 6 to a high level.

In the current detection circuit 3, the voltage level at the connection point g is higher than the voltage level at the reference voltage generation point h by a predetermined level, and the current flowing through the signal line 5 is from the movable contact 2c of the switch means 2. When it is in the second direction toward the connection point e, the second transistor Tr4 is turned on to set the other output signal line 7 to the low level.

The motor control device 1 in this case is
The current detection circuit 3 and the drive circuit 4 are integrated with the motor 20 and mounted in the door 22, the switch means 2 is mounted on the armrest portion of the door 22, and the movable contact 2 of the switch means 2 is mounted.
When c is switched to the earth side fixed contact 2b or the power source side fixed contact 2a, the first transistor Tr3 or the second transistor Tr4 is turned on depending on the direction of the current flowing through the signal line 5 and the voltage. When the line 6 goes high or the other output signal line 7 goes low, the relay RL1 or the relay RL2
Is turned on and the motor shaft 20c of the motor 20 is normally or reversely rotated, so that the window glass 23 is moved to the descending side or the ascending side.

[0041]

As described above, since the motor control device according to the present invention has the above-mentioned configuration, it is driven by the direction of the current flowing through the signal line of the transfer signal transferred from the switch means and its voltage level. Since the circuit is operated to control the motor, the circuit in the switch means can be simplified compared to the one in which the level value setting circuit is provided in the switch means, which is an excellent effect that the switch can be downsized. Is played.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of a motor control device according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a current direction and a voltage of the motor control device shown in FIG.

FIG. 3 is a circuit configuration diagram of another embodiment of the motor control device according to the present invention.

[Explanation of symbols]

1 Motor Control Device 2 Switch Means 2c Movable Contact 3 Current Detection Circuit 3a Reference Voltage Generation Circuit 3b First Differential Amplifier 3c Second Differential Amplifier 4 Drive Circuit 5 Signal Line 20 Motor R1, R2, R3, R4 First Resistor, second resistor, third resistor, fourth resistor Tr3, Tr4 first transistor, second transistor VB power supply

Claims (4)

[Claims] 1. A motor control device for driving a motor in forward or reverse rotation, the switch means having a movable contact connected to a power source or ground by a manual operation, and a signal line connected to the movable contact. A first output signal is generated when the current flowing in the signal line is in the first direction and is equal to or higher than a predetermined level value, and the current flowing in the signal line is in the second direction and is set in advance. A current detection circuit that generates a second output signal when the level is equal to or higher than a predetermined level value, and a first output signal from the current detection circuit that causes the motor to rotate in the forward rotation direction and a second output signal that controls the motor. A motor control device comprising a drive circuit for rotating the motor in a reverse rotation direction. 2. The current detection circuit includes first, second, third and fourth resistances connected in series between a power source and ground, a reference voltage generation circuit for generating a reference voltage, and the first resistance. First and second
A first differential amplifier to which the voltage at the connection point of the resistor and the reference voltage of the reference voltage generation circuit are input, and the voltage at the connection point of the third and fourth resistors and the reference voltage of the reference voltage generation circuit. 2. The motor control device according to claim 1, wherein the motor control device is configured by a second differential amplifier to which is input. 3. The current detection circuit includes first, second, third and fourth resistors connected in series between a power supply and ground, a reference voltage generation circuit for generating a reference voltage, and the first voltage generator. First and second
Of the reference voltage generating circuit, and the base of the first transistor having the emitter connected to the reference voltage generating point of the reference voltage generating circuit and the base of the connecting point of the third and fourth resistors. Second with the emitter connected to the reference voltage generation point
2. The motor control device according to claim 1, wherein the motor control device is configured by: 4. The current detection circuit and the drive circuit are integrally assembled to the motor.
3. The motor control device according to any one of 3 above.