JP2002204589A - Motor drive control device for on-vehicle equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor drive control device for an on-vehicle equipment which can obtain a stable operation by eliminating the influence of an input voltage. SOLUTION: A control circuit 3 has a function which recognizes the input voltage from an input power source 1 on the basis of an input value from an input voltage detecting circuit 6, and changes a time limit operation time (control time of a drive circuit 4) of the timer function of the control circuit 3 in response to the input voltage, and can restrain a difference between the drawing-out time of a sunshade and the control time to be minimum when the input voltage changes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor drive control device for on-vehicle equipment such as a sunshade.

[0002]

2. Description of the Related Art Conventionally, a motor drive control device used for controlling a drive motor of a vehicle-mounted sunshade equipped on a vehicle has an upper limit position for opening and closing the sunshade.
The drive motor is stopped by detecting with a microswitch or the like, and the drive motor is stopped by detecting the lower limit position by increasing the motor current due to the lock of the drive motor.

On the other hand, there is also a motor drive control device which employs a control method for stopping the drive motor by detecting both the upper limit position and the lower limit position when the sunshade is opened and closed by increasing the motor current due to the lock of the drive motor. Was.

[0004]

In the case of the former conventional example, a step of adjusting the detection position of the microswitch is required, and a cable from the control circuit for controlling the driving motor to the microswitch is required. Met.
Therefore, in order to eliminate the micro switch and eliminate cable routing, a one-way clutch was adopted so that the sunshade would rotate at the upper limit position after the sunshade was pulled out, and a timer function that could provide the end of the pulling out operation in the control circuit was provided. There has been proposed a control method for stopping after a lapse of a predetermined time.

In this method, since the control circuit has a timer function with a fixed time limit operation time, for example, when the input voltage decreases, the rotation of the driving motor slows down, and the time until the drawing-out is completed becomes longer. There is no room for the timed operation of the timer function, and in some cases, the time may elapse before the withdrawal is completed.

For this reason, it is conceivable to adopt a method of stabilizing the motor drive voltage even if the input voltage fluctuates. However, a stabilizing circuit for a large current power supply for driving the motor is required, which causes a cost increase. There was a problem of becoming. Further, if the time limit operation time of the timer function is set longer, there is a problem that the idle time after the draw-out is completed when the input voltage is high becomes longer and the image of the product becomes worse.

On the other hand, in the case of the conventional example in which the upper limit position and the lower limit position are detected by using the lock of the drive motor and the drive motor is stopped, the lock determination reference value (voltage) of the drive motor is used.
Is fixed and the input voltage of the driving motor changes (especially when the voltage decreases), the reference value (voltage) of the lock determination decreases, and the margin between the detection voltage of the input voltage and the reference value (voltage) increases. There was a possibility of malfunction due to loss.
In addition, there is a possibility that an erroneous determination may be made during normal operation if a margin is provided.

As described above, without using a microswitch,
Both when using the timer function and when using the lock of the driving motor, there is a problem in that it is affected by fluctuations in the input voltage from the input power supply.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a motor drive control device for an on-vehicle facility capable of obtaining a stable operation without an influence of an input voltage. It is in.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, an input power supply using a battery, a driving motor for moving on-vehicle equipment, and an input power supply from the time of operating an operation switch are provided. An input voltage from an input power supply is detected in a motor drive control device for an in-vehicle facility, the control device including a control circuit that controls a drive circuit to start operation of a drive motor as a power supply and stop when a predetermined condition is reached. The control circuit has a timer function that starts a timed operation from the start of operation of the driving motor and sets the end point of the timed operation to the predetermined condition. The time limit operation time of the timer function is varied so that the difference from the time required for moving the vehicle-mounted equipment of the drive motor to the predetermined position is substantially constant according to the input voltage of the drive motor. The features.

According to the second aspect of the present invention, the operation of the drive motor is started by using the input power supply as a power supply from the time of operating the operation switch, and the input power supply using the battery, the drive motor for moving the on-vehicle equipment, And a control circuit for controlling a drive circuit so as to stop the motor when the motor reaches the motor. Input voltage detecting means for detecting
The control circuit includes a lock determination function that sets the detected current flowing through the drive motor to a lock determination reference value as the predetermined condition, and responds to a detected change in the input voltage from the input power supply in a vertical direction. The lock determination reference value is changed up and down.

According to a third aspect of the present invention, in the second aspect of the present invention, the input voltage from the input power supply is divided by a resistance, and the voltage by the resistance division that changes vertically according to the vertical change of the input voltage from the input power supply is locked. It is characterized in that the control circuit is constituted by using a comparator for comparing the lock determination reference value with a voltage value between both ends of a current detection resistor through which a current of the driving motor flows, as a determination reference value.

According to the fourth aspect of the present invention, the operation of the driving motor is started by using the input power supply as a power supply from the time of operating the operation switch, by operating the input motor using the battery, the driving motor for moving the vehicle-mounted equipment, and the predetermined conditions. And a control circuit for controlling a drive circuit so as to stop the vehicle when the vehicle has reached the vehicle-mounted equipment, wherein the vehicle-mounted equipment is a sunshade, and current detection means for detecting a current flowing through the drive motor. And an input voltage detecting means for detecting an input voltage from an input power supply.
A timed operation is started from the time when the driving motor starts operating in the sunshade opening direction, a timer function that sets the end point of the timed operation to the predetermined condition, and the driving motor is operated in the sunshade closing direction. And a lock determination function that sets the predetermined condition that the motor current flowing to the lock determination reference value has risen, and moves the vehicle-mounted equipment of the drive motor to a predetermined position according to the input voltage from the input power supply detected. The time limit operation time of the timer function is varied so that the difference from the required time becomes substantially constant, and the lock determination reference value is changed up and down according to the up and down change of the input voltage from the input power supply. It is characterized by.

According to a fifth aspect of the present invention, in the second or fourth aspect, the control circuit includes a drive circuit for operating the drive motor when the detected input voltage from the input power supply falls outside a predetermined range. A function of canceling the output of the control signal to the controller.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. (Embodiment 1) This embodiment is an embodiment corresponding to the invention of claim 1, and FIG. 1 shows a block diagram of this embodiment.

The present embodiment relates to a motor drive control device corresponding to a drive motor for a vehicle sunshade. As shown in the figure, an input power supply 1 using a battery mounted on a vehicle, and an input power supply 1 From 1 the input voltage is
A power supply circuit 2 for supplying a stable voltage by a voltage regulator in order to cope with fluctuations due to engine operation and stoppage, battery deterioration, and the like, and a microcomputer using the output voltage of the power supply circuit 2 as a power supply , A driving circuit 4 controlled by the control circuit 3, a driving motor 5 driven by the driving circuit 4, and a control circuit 3 which divides an input voltage by resistors R1 and R2. A /
It comprises an input voltage detection circuit 6 for inputting to the D input port and an operation switch 7 for opening and closing the sunshade.

Here, the divided voltage output by the input voltage detection circuit 6 is set to be lower than the input voltage from the power supply circuit 2 even when the input voltage from the input power supply 1 reaches the maximum value of the working voltage range. ing.

The microcomputer constituting the control circuit 3 includes an operation switch 7 operated by a driver or a passenger.
When an operation signal is input from the D, the operation signal is recognized and the sunshade is opened or closed for the UP operation.
A control signal for OWN operation is output to the drive circuit 4.

The drive circuit 4 operates a relay (not shown) for UP operation or DOWN operation according to a control signal from the control circuit 3 to connect the drive motor 5 to a battery as the input power supply 1 and operate. Let it. After the motor output of the driving motor 5 is reduced by the gear, the sunshade is opened / closed.

When the control signal from the control circuit 3 is no longer input, the drive circuit 4 resets the relay, stops the power supply to the drive motor 5, and stops the drive motor 5. Thus, the opening / closing of the sunshade stops.

In this embodiment, the drive motor 5 is stopped after a predetermined time has elapsed from the start of the operation by the timer function of the control circuit 3 during the UP operation, and during the DOWN operation,
A control method is adopted in which the lock of the driving motor 5 is determined based on the motor current or the like, and the driving motor 5 is stopped.

Although a circuit for detecting the current for determining the lock is omitted in the drawing, it is preferable to detect the current by inserting a resistor in the current path of the motor current as in a second embodiment described later. Further, the lock determination reference value may be fixed, or a method similar to the second embodiment described later may be employed.

Here, the control circuit 3 recognizes the input voltage from the input power supply 1 based on the input value from the input voltage detection circuit 6, and the input voltage is, for example, less than 11 V (this voltage is the rated voltage of the battery used). In this case, the control time of the drive circuit 4 is set to 4.5 seconds, 4.0 seconds when the voltage is 11 V or more and 13 V or less, 3.5 seconds when the voltage is 13 V or more and less than 15 V, and 3.0 seconds when the voltage is 15 V or more. The timer has a function of changing the time limit operation time (control time of the drive circuit 4) T1 of the timer function of the control circuit 3 as shown in FIG.

The interval such as the threshold value of the input voltage from the input power supply 1 and the control time T1 according to the input voltage can be set by a program of a microcomputer constituting the control circuit 3.

As described above, in the present embodiment, even if the input voltage fluctuates, the difference between the sunshade extraction time T2 and the control time T1 can be minimized as shown in FIG. (Embodiment 2) This embodiment corresponds to the invention of claim 2, and FIG. 3 is a block diagram of this embodiment.

In this embodiment, as shown in the figure, an input power supply 1 using a battery mounted on an automobile, and an input voltage from the input power supply 1 fluctuates when the engine is running and when it is stopped, or when the battery is deteriorated. To cope with this, a power supply circuit 2 for supplying a stable voltage by a voltage regulator, a control circuit 3 including a microcomputer using the output voltage of the power supply circuit 2 as a power supply, and a drive controlled by the control circuit 3 A circuit 4, a driving motor 5 driven by the driving circuit 4, and an A / D of a microcomputer which is inserted into a current path of the motor current for detecting the motor current and has a voltage value between both ends thereof which constitutes the control circuit 3. A lock current detection resistor R3 input to the input port, an input voltage detection circuit 6 for detecting an input voltage from the input power supply 1,
And an operation switch 7 for opening and closing the sunshade.

The microcomputer constituting the control circuit 3 includes an operation switch 7 operated by a driver or a passenger.
When an operation signal is input from the controller, a control signal for an UP operation for opening the sunshade or a DOWN operation for closing the sunshade is output to the drive circuit 4.

The drive circuit 4 operates a relay (not shown) for UP operation or DOWN operation in accordance with a control signal from the control circuit 3 to connect the drive motor 5 to a battery as the input power supply 1 and operate. Let it. After the motor output of the drive motor 5 is reduced by the gears, the sunshade is opened / closed. And at the time of UP operation,
When the output of the control signal from the control circuit 3 to the drive circuit 4 is stopped after a predetermined time has elapsed by the timer function in the control circuit 3,
The drive circuit 4 stops power supply to the drive motor 5 and stops the drive motor 5. This timer function may employ a method of changing the timed operation time in accordance with the input voltage, as in the first embodiment, or may employ a method of fixing it.

In the present embodiment, at the time of the DOWN operation, the microcomputer of the control circuit 3 recognizes the input voltage value from the input voltage detection circuit 6 and determines the lock determination reference value (lock voltage) according to the input voltage (power supply voltage). Detection level). At this time, regarding the setting of the lock determination reference value, the lock current value decreases as the input voltage decreases, and the lock current value increases as the input voltage increases. Set the value L.
Then, when the motor current input value exceeds the lock determination reference value L, the control circuit 3 determines that the motor is locked, and stops outputting the control signal to the drive circuit 4. When the control signal is no longer input, the drive circuit 4 shuts off the power supply to the drive motor 5 and stops the drive motor 5. 4A shows the motor current during normal operation, and B shows the motor current during locking.

As described above, in this embodiment, the microcomputer of the control circuit 6 recognizes the input voltage value from the input voltage detection circuit 6, and according to the input voltage, as shown in FIG. In order to change the lock detection level L, it is possible to set a margin with respect to a method of setting the lock determination reference value to a fixed value.

In the present embodiment, when the input voltage value from the input voltage detection circuit 6 is out of the operating voltage range, the control circuit 3 cancels or controls the input of the operation signal of the operation switch 7. By stopping the signal output, a malfunction at a low voltage with a small difference between the lock current and the normal current can be prevented, and destruction of the circuit at a high voltage can be prevented.

(Embodiment 3) This embodiment corresponds to Embodiment 2
Instead of the control circuit 3 comprising a microcomputer, the control circuit is constituted by a comparator CP as shown in FIG.

In the circuit state shown in FIG. 5, the transistor Q1 connected to the battery as the input power source 1 via the relay contact r11 and the exciting coil of the relay RY1, and the relay contact r21 and the exciting coil of the relay RY2 are connected. The output of the comparator CP connected to the respective bases of the transistors Q2 via resistors is at "H" level.

When the operation switch 7 is operated to the UP side, the transistor Q1 is in the ON state, so that the operation switch 7, the exciting coil of the relay RY1, the transistor Q1
A current flows through the circuit No. 1 and the relay RY1 operates to invert the relay contacts r11 and r12, respectively. The relay contact r11 is a contact for a self-holding circuit. Even after the operation switch 7 returns to the neutral position after being turned on, an exciting current flows through the exciting coil of the relay RY1 via the relay contact r11, and the operating state is maintained. .

On the other hand, when the relay contact r12 is switched from the contact b to the contact a, the driving motor 5 has a positive pole of the input power source → the contact a of the relay contact r12 → the driving motor 5 → the contact b of the relay r22. Current flows through the path from the contact side → the resistance R4 for detecting the motor current → the negative pole of the input power supply 1, and the drive motor 5 rotates to the UP operation side to operate the sunshade via the speed reduction mechanism using gears.

Then, the driving motor 5 is locked, the motor current increases, and the voltage across the resistor R4 is calculated by the comparator CP obtained by dividing the input voltage by the resistors R5 and R6.
, The output of the comparator CP is inverted to the “L” level, and the transistor Q1 is turned off. As a result, the exciting current to the exciting coil of the relay RY1 is cut off, and the relay RY1 returns. Therefore, the relay r12 returns to the contact b side, and cuts off the power supply to the driving motor 5. As a result, the driving motor 5 stops, and the operation of the sunshade stops.

Similarly, when the operation switch 7 is operated to the DOWN side, the transistor Q2 is in the ON state, so that a current flows through the circuit of the operation switch 7, the exciting coil of the relay RY2, and the transistor Q2, and the relay RY2 operates. The relay contacts r21 and r22 are respectively inverted. The relay contact r21 is a contact for a self-holding circuit. Even when the operation switch 7 returns to the neutral position after being turned on, an exciting current flows through the exciting coil of the relay RY2 via the relay contact r21,
The operating state is maintained.

On the other hand, when the relay contact r22 is switched from the contact b to the contact a, the driving motor 5 is connected to the positive pole of the input power source 1, the contact a of the relay contact r22, the driving motor 5 and the contact b of the relay contact r21. A current flows through the path from the contact side → the resistance R4 for detecting the motor current → the negative pole of the input power supply 1, and the drive motor 5 rotates to the DOWN operation side to operate the sunshade via the speed reduction mechanism using gears.

Then, the drive motor 5 is locked and its motor current rises, and the voltage across the resistor R4 is calculated by the comparator CP obtained by dividing the input voltage by the resistors R5 and R6.
, The output of the comparator CP is inverted to the “L” level, and the transistor Q2 is turned off. As a result, the exciting current to the exciting coil of the relay RY2 is cut off, and the relay RY2 returns. Therefore, the relay r22 returns to the contact b side, and cuts off the power supply to the driving motor 5. As a result, the driving motor 5 stops, and the operation of the sunshade stops.

In this embodiment, when the input voltage from the input power supply 1, that is, the voltage applied to the motor decreases, the reference value of the lock determination reference value is determined according to the input voltage value detected by the voltage division of the resistors R5 and R6. When the voltage is set low and, conversely, when the voltage applied to the motor increases, the reference voltage is set high. Therefore, the lock determination reference value L is increased or decreased in response to the input voltage from the input power supply 1, that is, the power supply voltage. The result lock determination reference value can be set with a margin.

[0041]

According to the first aspect of the present invention, the operation of the driving motor is started by using the input power as a power source when the operation switch is operated, the input power using the battery, the driving motor for moving the on-vehicle equipment, And a control circuit for controlling a drive circuit so as to stop when a condition is reached.In-vehicle equipment motor drive control device, provided with input voltage detection means for detecting an input voltage from an input power supply, the control circuit Starts timed operation from the start of operation of the drive motor,
A timer function that sets the end point of the timed operation to the predetermined condition is provided, and a difference between the time required to move the vehicle-mounted equipment of the driving motor to the predetermined position according to the detected input voltage from the input power supply is determined. Since the time limit operation time of the timer function is changed so as to be substantially constant, it is not affected by the fluctuation of the input voltage from the input power supply, and it is possible to eliminate a difference in idle time after the operation is completed, and as a result, Stable operation is obtained, and there is an effect that the time-up of the timer function in the middle of the operation and the deterioration of the product image due to idle running time after the operation is completed can be prevented, and compared with the case where a micro switch is used. This has the effect of simplifying the entire configuration and reducing costs.

According to a second aspect of the present invention, the operation of the drive motor is started by using the input power supply as a power supply from the time of operating the operation switch, by operating the drive motor when the operation switch is operated. And a control circuit for controlling a drive circuit so as to stop the motor when it reaches the motor. In the motor drive control device for an on-vehicle facility, a current detection unit for detecting a current flowing through the drive motor is provided, and an input voltage from an input power supply is provided. The control circuit has a lock determination function that sets the predetermined condition that the current flowing through the detected drive motor has risen to the lock determination reference value, and the control circuit has a lock determination function. Since the lock determination reference value is changed up and down according to the up and down change of the input voltage from the power supply, there is a margin in setting the lock detection level of the lock determination function. Erroneous determination of lock detection due to variations in motor current due to fluctuations in the input voltage from the input power supply.Also, sufficient operation margin in normal operation can be secured, and stable operation can be obtained. There is an effect that it can be.

According to a third aspect of the present invention, in the second aspect of the present invention, the input voltage from the input power supply is divided by a resistance, and the voltage by the resistance division that changes vertically according to the vertical change of the input voltage from the input power supply is locked. Since the control circuit is configured using a comparator that compares the lock determination reference value with the voltage value across the current detection resistor through which the current of the drive motor flows, the effect of claim 2 is used. The playing device can be realized by a mochida control circuit as a comparator.

According to a fourth aspect of the present invention, the operation of the driving motor is started by using the input power source as a power source when the operation switch is operated when the input power source using a battery, the driving motor for moving the vehicle-mounted equipment, and the operation switch are operated. And a control circuit for controlling a drive circuit so as to stop the vehicle when the vehicle has reached the on-vehicle facility motor drive control device, wherein the on-vehicle facility is a sunshade, and a current detecting means for detecting a current flowing through the drive motor. And an input voltage detecting means for detecting an input voltage from an input power supply, and the control circuit starts a timed operation from a time when the driving motor starts operating in a direction in which the sunshade is opened. And the motor current flowing when the driving motor is operating in the closing direction of the sunshade is a lock determination criterion. And a lock determination function that sets the rise to the predetermined condition as described above, and a difference from a time required for moving the vehicle-mounted equipment of the drive motor to a predetermined position in accordance with the input voltage from the input power supply detected. 3. The invention according to claim 1, wherein the time limit operation time of the timer function is changed so as to be substantially constant, and the lock determination reference value is changed up and down in accordance with an up and down change of an input voltage from an input power supply. There is an effect that a motor drive control device for an in-vehicle sunshade exhibiting the above effect can be realized.

According to a fifth aspect of the present invention, in the second or fourth aspect, the control circuit includes a drive circuit for operating the drive motor when the detected input voltage from the input power supply falls outside a predetermined range. The function of canceling the output of the control signal to the IC prevents the malfunction at low voltage where the difference between the lock current and the normal current is small, and has the effect of preventing the destruction of the circuit at high voltage. is there.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a relationship among a control time, a power supply voltage, and a sunshade withdrawal time in the above.

FIG. 3 is a circuit configuration diagram according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a lock determination reference value according to the above.

FIG. 5 is a circuit configuration diagram according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 input power supply 2 power supply circuit 3 control circuit 4 drive circuit 5 drive motor 6 input voltage detection circuit 7 operation switch

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tomoyuki Shimizu 1048 Kazuma Kadoma, Kadoma, Osaka Prefecture F-term in Matsushita Electric Works Co., Ltd.

Claims (5)

[Claims] An input power source using a battery, a drive motor for moving on-vehicle equipment, and operation of the drive motor using the input power source as a power source when operating an operation switch, and stopping when a predetermined condition is reached. An input voltage detecting means for detecting an input voltage from an input power supply, wherein the control circuit includes an operation circuit for controlling an operation of the driving motor. It has a timer function that starts the timed operation from the start and sets the end point of the timed operation to the predetermined condition, and moves the vehicle-mounted equipment of the driving motor to a predetermined position according to the input voltage from the input power supply that is detected. A motor drive control device for an on-vehicle facility, wherein a time limit operation time of the timer function is varied so that a difference from a time required for the vehicle is substantially constant. 2. The operation of a driving motor using an input power source as a power source when an operation switch is operated and an input power source using a battery, a driving motor for moving on-vehicle equipment, and stopping when a predetermined condition is reached. A motor drive control device for an on-vehicle facility, comprising: a control circuit for controlling a drive circuit so as to control a drive circuit; and a current detection means for detecting a current flowing through the drive motor, and an input voltage for detecting an input voltage from an input power supply. The control circuit is provided with a lock determination function for setting the detected current flowing through the drive motor to the lock determination reference value as the predetermined condition, and detecting the input voltage from the input power supply. A motor drive control device for an on-vehicle facility, wherein the lock determination reference value is changed up and down according to the up and down change of the motor. 3. An input voltage from an input power supply is divided by a resistor, and a voltage based on a resistance division that changes vertically according to a change in the input voltage from the input power supply is used as a lock judgment reference value. 3. The control circuit according to claim 2, wherein the control circuit comprises a comparator that compares a voltage value between both ends of a current detection resistor through which a current of the drive motor flows.
The motor drive control device for an in-vehicle facility according to the above. 4. An input power supply using a battery, a drive motor for moving on-vehicle equipment, and operation of the drive motor using the input power supply as a power supply when the operation switch is operated, and stopping when a predetermined condition is reached. And a control circuit for controlling the drive circuit so as to cause the on-vehicle equipment to be a sunshade, wherein the on-vehicle equipment is provided with current detection means for detecting a current flowing through the drive motor, and an input power supply. Input voltage detection means for detecting an input voltage from the control circuit, the control circuit starts the timed operation from the time when the driving motor is started to operate the sunshade in the opening direction, and ends the timed operation with the above predetermined condition. Timer function to check that the motor current flowing when the drive motor is operating in the sunshade closing direction has risen to the lock determination reference value. A lock determination function for setting the predetermined condition, wherein a difference from a time required for moving the vehicle-mounted equipment of the drive motor to a predetermined position according to the detected input voltage from the input power source is substantially constant. A motor drive control device for an on-vehicle facility, wherein the time limit operation time of the timer function is varied, and the lock determination reference value is vertically changed in accordance with a vertical change of an input voltage from an input power supply. 5. The control circuit has a function of canceling the output of a control signal to a drive circuit for operating the drive motor when the detected input voltage from the input power supply falls outside a predetermined range. 5. The method according to claim 2, wherein
A motor drive control device for an in-vehicle facility according to the above.