JP2010144379A - Equipment for controlling opening and closing body for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide equipment for controlling an opening and closing body for a vehicle which can surely start the opening and closing body for the vehicle and start opening and closing at a low speed even in the use of a small-sized direct-current motor, and can operate the opening and closing body excellent in operability and an upscale image. <P>SOLUTION: The equipment for controlling the opening and closing body for the vehicle includes: a control means 7 for sending out a drive signal d for controlling a drive voltage of a direct-current motor 1; a drive circuit 5 which applies the drive voltage to the direct-current motor 1 according to the drive signal d; and a revolution sensor 2 which outputs a revolution signal r depending on the rotation of the direct-current motor 1. The opening and closing body 8 is driven by the direct-current motor 1. The control means 7 sets the drive voltage as an approximately rated voltage of the direct-current motor 1 in a starting period from the reception of opening and closing instructions from an operation switch 6 to the detection of the predetermined number of revolution signals r so as to enable the opening and closing of the opening and closing body 8 to be started at a low speed by reducing the drive voltage at the termination of the starting period. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control device for an opening / closing body provided in a vehicle, and more particularly to a vehicle opening / closing body control device that controls opening / closing of a vehicle opening / closing body driven by a DC motor at a low speed.

  The vehicle is equipped with various opening / closing bodies such as a sunroof, a power window, and a sunshade. These opening / closing bodies are operated by a motor, and the opening / closing bodies are opened / closed by transmitting the rotational driving force of the motor to the opening / closing mechanism via a wire, an arm or the like. In order to drive a vehicle opening / closing body, a low-cost and easy-to-control DC motor is frequently used. In general, a DC motor having a large generated torque is used so that the opening / closing body can be reliably operated even when the load changes under various environmental conditions, running conditions, and the like.

A DC motor has the advantage of generating a large torque, but when a specified voltage is simply applied to the DC motor to drive the opening / closing body, a large torque is suddenly generated at the start of opening and closing, so smooth startup is not possible. There was a problem. Further, since the speed of the opening / closing body is increased, there is a problem that minute opening / closing control by the operation switch is not easy.
Conventionally, a speed control method for an opening / closing body has been proposed to solve the above-described problems.
With regard to power windows, in the conventional example, it is easy to perform minute opening and closing control with the operation switch at the start of opening and closing of the window glass, and to prevent the sound generated by fast start and sudden stop of the window glass. A control device that reduces the speed at the start and end of opening and closing of a window glass is known (see Patent Document 1).
In another conventional example, after a constant starting voltage is applied to the motor for a predetermined time at the start of opening / closing of the window glass, the speed control of the motor is stepped so that the opening / closing speed of the window glass becomes a predetermined acceleration target speed. Is performed (see Patent Document 2).

JP 7-18947 A Utility Model Registration No. 2577092

In the conventional example of the power window control, as shown in FIG. 6, when the operation switch is turned on and an opening / closing instruction is given, the opening / closing body is gently accelerated (slow-up control) and then moved at a predetermined speed, When fully open or fully closed, etc., control is performed to decelerate (slow down control) and stop. By this slow-up control, even when a motor with a large generated torque is used, it can be operated at a low speed at the start of opening and closing.
However, if the DC motor is downsized and the opening / closing body is started to open / close at a low speed, there is a problem that the starting torque of the DC motor is insufficient and the opening / closing body cannot start when the static friction of the opening / closing body is large. On the other hand, when a large amount of driving power is supplied at the start-up to ensure the start-up of the small motor, there is a problem that the slow-up control is difficult because the opening / closing body operates at high speed rapidly.

Further, in the other conventional example, control for applying a constant starting voltage for a predetermined time at the time of starting is performed depending on the position of the window glass.
However, even with the same opening and closing body, the starting load fluctuates due to environmental conditions, etc., so that the planned smooth acceleration cannot be realized, and when using a small motor, the starting torque is not sufficiently obtained There is a problem. Further, since the control mode is determined based on the position of the opening / closing body, control for starting the opening / closing body from a low speed is not considered regardless of the position or the opening / closing direction.

  The motor used for driving the opening / closing body of the vehicle is desired to be as small and light as possible. However, the torque required to start the motor depends on the static friction of the opening / closing body. The static friction changes not only with the secular change of the opening / closing body and the guide member, but also with changes in environmental conditions such as temperature and freezing, so the load when the opening / closing body is restarted fluctuates. For this reason, it is necessary to use a DC motor with a large generated torque in order to start the opening and closing from low speed by reliably starting the opening and closing body that is heavy and has a large static friction, such as the sunroof, the sunshade of the sunroof part, and the movable roof. It was difficult to reduce the size of the DC motor.

  Furthermore, recently, a high-class feeling is required for the operation of the opening / closing body provided in the vehicle. For this reason, the opening / closing body can be smoothly activated, and the opening / closing speed slow-up control and slow-down control can be widely applied. It is necessary.

  In view of the above problems, the present invention can reliably start a vehicle opening / closing body and start opening / closing at a low speed even when a small DC motor is used, and is excellent in operability and high-class feeling by slow-up control. It is an object of the present invention to provide a vehicular opening / closing body control device capable of operating the opened / closed body.

The present invention is as follows.
1. A vehicle opening / closing body control apparatus for controlling an opening / closing body mounted on a vehicle by a DC motor and controlling the opening / closing body to start opening / closing at a low speed, and a drive signal for controlling a driving voltage of the DC motor Control means for sending out, a drive circuit for applying the drive voltage to the DC motor in accordance with the drive signal, and a rotation sensor for outputting a rotation signal in accordance with the rotation of the DC motor to the control means. The control means uses the drive voltage as the substantially rated voltage of the DC motor during the start-up period after receiving the opening / closing instruction from the operation switch until detecting a predetermined number of the rotation signals, and at the end of the start-up period, A vehicular opening / closing body control device that opens and closes the opening / closing body at the low speed by reducing a drive voltage.
2. The control means sets the drive voltage at the end of the start-up period according to the length of the start-up period. The opening / closing body control apparatus for vehicles of description.
3. The control means reduces the drive voltage at the end of the start period so that the speeds of the opening and closing bodies are substantially the same before and after the end of the start period. Or 2. The vehicle opening / closing body control device described in 1.
4). The opening / closing body is either a power window or a sunshade. To 3. The vehicle opening / closing body control device according to any one of the above.
5). The opening / closing body is either a sunroof or a movable roof. To 3. The vehicle opening / closing body control device according to any one of the above.

  In the start-up period from the start of the DC motor to the detection of a predetermined number of rotation signals, the drive voltage of the DC motor is set to the substantially rated voltage of the DC motor, and the drive voltage is reduced at the end of the start-up period The vehicle opening / closing body control device of the present invention that controls the opening / closing body to open and close at a low speed can supply sufficient driving power to the DC motor during the start-up period even when the opening / closing body has a large starting load. Therefore, the opening / closing body can be reliably started by fully utilizing the performance of the small DC motor. Since the opening / closing body can be slow-up controlled from a low speed by reducing the drive power at the end of the start-up period, it is possible to realize a high-quality opening / closing operation with good opening / closing operability.

If the drive voltage at the end of the start-up period is set according to the length of the start-up period, the load size is determined by the time until the predetermined rotation is confirmed after the start-up of the DC motor, Since the drive voltage can be reduced to a corresponding value, the opening / closing body can be reliably operated from a low speed.
Furthermore, if the drive voltage is reduced at the end of the start-up period so that the speed of the open-close body is substantially the same before and after the end of the start-up period, the opening / closing start operation of the open / close body can be made smoother. .

If this vehicle opening / closing body control device is applied to either a power window or a sunshade, the DC motor used to drive the opening / closing body can be reduced in size as compared with the prior art, and the operability and high-class feeling can be achieved. It is possible to realize an excellent opening / closing operation.
In addition, if this vehicle opening / closing body control device is applied to either a sunroof or a movable roof, it can be reliably started even when the mass of the opening / closing body is large and the static friction is large, and the DC motor used is downsized. In addition, an opening / closing operation excellent in operability and high-class feeling can be realized.

  The vehicle opening / closing body control apparatus according to the present invention is a speed control for driving an opening / closing body mounted on a vehicle using a DC motor to start opening / closing of the opening / closing body at a low speed, and generates a large amount of driving power during the start-up period. The motor is reliably started by supplying it to the motor, and after that, the driving power is reduced, and the opening / closing body is started to open / close at a low speed even when the static friction of the opening / closing body is large.

  The start-up period is a short time from when the opening / closing instruction is given by turning on the operation switch until it is confirmed that the DC motor has made a predetermined rotation. The control operation during the activation period is hereinafter referred to as “activation phase”. The speed control executed after the start-up period includes slow-up control that gradually accelerates the open / close body from a low speed, but the mode of changing the open / close speed of the open / close body after the end of the start-up period is not particularly limited. Absent.

The opening / closing body to be controlled by the vehicle opening / closing body control apparatus can be any opening / closing body mounted on the vehicle and driven by a DC motor. For example, a power window that raises and lowers the window glass, a sunroof portion, an electric sunshade provided in the window portion, and the like can be given.
Further, the present invention can be applied to an opening / closing body having a large mass and static friction, such as a sun roof provided with an opening in a vehicle roof, and a movable roof (retractable roof) that electrically opens and closes all or part of the vehicle roof.

(Constitution)
The vehicle opening / closing body control apparatus is configured as shown in FIG. 1, and the vehicle opening / closing body 8 is driven by a DC motor 1. The vehicle opening / closing body control device includes at least a control unit 7 for controlling the DC motor 1, a drive circuit 5, and a rotation sensor 2.
Necessary electric power is supplied to an internal circuit constituting the vehicle opening / closing body control device at a predetermined voltage by a power supply circuit (not shown) that receives power from a vehicle battery.

The direct current motor 1 rotates by receiving power from the motor power supply 3 by the drive circuit 5 and opens and closes the opening / closing body 8 by the rotational drive. The motor power supply 3 is a DC power supply generated by the power supply circuit, and the voltage value is determined according to the rating of the DC motor 1 to be used (for example, DC 12 to 15 V).
The rated voltage of the DC motor 1 is a voltage necessary for operating the DC motor 1 with the most efficient output and rotation speed (rated output, rated rotation speed), and is a reference for driving the DC motor 1. Voltage.

  The rotation sensor 2 is provided for detecting the rotation state of the DC motor 1. Preferably, the configuration is such that a pulsed rotation signal is output at every certain rotation angle of the DC motor 1 by detecting a change in the magnetic field caused by the magnet rotating with the motor shaft by a plurality of Hall elements. it can. If it is possible to detect the rotation of the motor, a rotation sensor using an encoder or other known means may be used. The rotation sensor 2 outputs a rotation signal r synchronized with the rotation of the DC motor 1 to the control means 7.

Since the opening / closing (moving) speed of the opening / closing body 8 is substantially proportional to the rotation speed of the DC motor 1, the control means 7 measures the rotation speed of the DC motor 1 according to the period of the rotation signal r to obtain the moving speed of the opening / closing body 8. be able to. Further, since the moving amount of the opening / closing body 8 is substantially proportional to the number of rotations of the DC motor 1, the moving distance or position of the opening / closing body 8 can be calculated by counting the number of rotation signals r.
A plurality of rotation sensors may be provided for detecting the rotation direction of the DC motor 1, and a position sensor for the opening / closing body may be provided separately for detecting the position of the opening / closing body 8.

  The control means 7 controls the vehicle opening / closing body control device. The control function may be realized by either hardware or software, and is preferably configured by a CPU (microcomputer) including a CPU, a memory (ROM, RAM), an input / output circuit, and a peripheral circuit. it can. However, the present invention is not limited to this, and it may be configured by a programmable logic circuit, a gate array, or other logic circuits.

  The control means 7 is connected to a signal of an operation switch 6 provided for the user of the vehicle to open or close the opening / closing body 8, and the control means 7 receives an opening / closing instruction from the operation switch 6. In the present invention, the configuration and function of the operation switch 6 are arbitrary as long as it can receive an instruction to open and close the opening / closing body. For example, when the “open” or “close” switch (6a, 6b) in FIG. 1 is turned on, the control means 7 receives an opening / closing instruction. Based on whether the opening / closing instruction is “open” or “closed”, the control means 7 sends a forward signal for forward rotation of the DC motor 1 or a reverse signal for reverse rotation to the polarity switching circuit 4. Output to.

  Further, the rotation signal r output from the rotation sensor 2 is input to the control means 7. In order to measure the rotational speed of the DC motor 1 according to the period (interval) of the rotation signal r, the control means 7 includes a timer.

  The control means 7 outputs a drive signal d to the drive circuit 5 in order to control the drive voltage for the DC motor 1. Preferably, the driving voltage for the DC motor 1 can be controlled by pulse width modulation (PWM) control. The PWM control is a control method in which the average value of the voltage applied to the motor is changed by changing the duty ratio (ratio of the on-time to the period of the pulse signal), thereby changing the rotational speed of the motor. As a result, the pulse width modulated drive signal d is sent to the drive circuit 5.

The drive circuit 5 is connected in series with the DC motor 1 via the polarity switching circuit 4. The circuit includes a transistor, an FET, and the like, and applies a driving voltage to the DC motor 1 in response to the driving signal d output from the control means 7. The drive power supplied to the DC motor 1 is adjusted by changing the magnitude of the drive voltage.
In the PWM control, a switch element such as a transistor constituting the drive circuit 5 is switched by the drive signal d, whereby the motor power supply 3 is intermittently applied to the DC motor 1. Since the voltage applied to the DC motor 1 changes according to the duty ratio of the drive signal d, the drive power of the DC motor 1 is adjusted.

  The polarity switching circuit 4 is a circuit for switching the polarity of power supply to the DC motor 1. When a forward rotation signal is output from the control means 7, the polarity switching circuit 4 supplies power so that the DC motor 1 rotates forward, and the reverse rotation signal. Is output, power is supplied so that the DC motor 1 rotates in the reverse direction. The polarity switching circuit 4 can be configured using a relay. Alternatively, the driving circuit 5 may be integrated with the driving circuit 5 using a driving IC, an FET circuit, or the like.

(Control and operation)
Next, a control operation of the vehicle opening / closing body control device will be described. The control by the opening / closing body control device for a vehicle includes a startup phase as shown in FIG. 2 when the DC motor 1 is started. FIG. 2 shows an example of an operation in which the opening / closing body 8 is gradually accelerated from a low speed (acceleration phase) and then decelerated after being moved at a constant speed after the startup phase. Usually, the automatic and manual open / close modes set by the operation switches and the open / close stop by releasing the operation switches are not considered because they are not related to the present invention.

  The operation of the startup phase and the acceleration phase by the vehicle opening / closing body control device is not limited to the case where the opening / closing body 8 is moved from the fully closed state to the opening direction or from the fully open state to the closing direction. The present invention can also be applied to the case where the opening / closing body located at the position is moved in the opening or closing direction. The moving distance of the opening / closing body can be controlled by the number of rotation signals r. If necessary, the position of the opening / closing body may be directly detected by separately providing a position sensor for the opening / closing body 8.

The horizontal axis in FIG. 2 is the time T from when the opening / closing instruction is given when the operation switch 6 is turned on. The vertical axis of FIG. 2 represents the driving voltage V _d to be supplied to the DC motor 1.
In PWM control the drive voltage _{V d} corresponds to the duty ratio. Therefore, the vertical axis in FIG. 2 corresponds to the duty ratio. In a normal operation (operation indicated by a broken line in FIG. 2), the rotational speed of the DC motor 1 can be controlled by driving with a duty ratio corresponding to the target rotational speed of the DC motor 1.

The control in the startup phase will be described with reference to FIG. The voltage V _d is a drive voltage applied to the DC motor 1, and the rotation signal r represents a signal output from the rotation sensor 2 as the DC motor 1 rotates.
First, when the operation switch 6 is turned on and an opening / closing instruction is given, the rotation direction of the DC motor 1 is set by the polarity switching circuit 4 and then the drive voltage V _D0 is supplied by the drive circuit 5 (T = 0). . The drive voltage V _D0 can be set to a value substantially equal to the rated voltage of the DC motor 1. Even when the mass and static friction of the opening / closing body 8 are large, the drive voltage V _D0 is applied to the DC motor 1 during the startup phase in order to obtain a startup torque commensurate with the load. The PWM signal for driving the drive circuit 5 may have a duty ratio corresponding to the drive voltage V _D0 during the startup phase.
When the drive voltage V _D0 is applied, a large torque (starting torque) is generated in the DC motor 1. After the start-up, a large start-up current flows through the DC motor 1, and then the current value gradually decreases. During the start-up phase, a substantially rated voltage is applied to supply sufficient drive power to the DC motor 1 so that the performance of the DC motor 1 can be fully utilized.

When the DC motor 1 starts rotating, rotation signals r ₁ , r ₂ , r ₃ ... Are output from the rotation sensor 2, so that the control means 7 can confirm that the DC motor 1 has started rotating. it can. When the control means 7 detects a predetermined number n of rotation signals, it ends the startup phase (t _S ). For example, when the rotation sensor 2 outputs four rotation signals r per one rotation of the DC motor 1, the start phase is terminated when 12 rotation signals are detected, that is, when the DC motor 1 rotates three times. . The period of the activation phase (T = 0 to t _S ) can be about several tens to several hundreds of ms.
The predetermined number n may be appropriately determined depending on the load at the time of start-up, its fluctuation range, the characteristics of the DC motor 1, and the like.

However, when it is determined that the load on the DC motor 1 is light after the start phase is started, it is not necessary to continue to apply the substantially rated voltage V _D0 to the DC motor 1 until the end of the start phase, and the drive voltage is sequentially set. It is also possible to reduce. The interval (cycle) of the rotation signal r that arrives after the start-up phase starts can be measured by a timer provided in the control means 7. Accordingly, the rotational speed (the number of revolutions per unit time) of the DC motor 1 is also obtained. Therefore, the control means 7 can determine that the load of the DC motor 1 is small when the rotational speed reaches a predetermined value earlier than a predetermined time after the start phase is started. The voltage may be controlled so as to be sequentially reduced from a substantially rated voltage.

Next, control at the end of the startup phase will be described.
3, the control unit 7 by reducing the driving voltage of the DC motor 1 at the end of the startup phase to V _DS, the opening and closing member 8 is controlled to move at a low speed. Control means 7 may be changed to a duty ratio corresponding to the drive signal d to the driving voltage V _DS.
Even if the drive voltage is reduced from V _D0 to V _DS at the end of the startup phase, the DC motor 1 does not stop due to the inertia of the DC motor 1 and the opening / closing body 8, and the opening / closing body can be moved at a low speed. The state can be obtained.
The value of the drive voltage V _DS is the size and characteristics of the DC motor 1 of the load can be appropriately determined in a range of, for example, about 30-50% of the rated voltage.

Driving voltage V _DS at the above startup phase ends, an initial value of the subsequent speed control in startup phase. After the start-up phase is completed, control can be performed according to a separately defined speed control pattern. The speed control pattern is a pattern of temporal change in the moving speed of the opening / closing body 8, that is, the rotational speed of the DC motor 1. The control means 7 can be controlled to supply a drive voltage corresponding to the speed according to the speed control pattern stored in the memory.
For example, as shown in the acceleration phase of Fig. 3, the drive voltage at the end of the startup phase is set to V _DS, thereby gradually increasing the rotational speed of the DC motor 1 (slow-up) by increasing the subsequent driving voltage Can do. Specifically, the control means 7 may adjust the duty ratio of the PWM signal so as to correspond to the target rotation speed. For example, when the duty ratio for applying a substantially rated voltage to the DC motor 1 in the startup phase is 0.7, the duty ratio is reduced to 0.3 at the end of the startup phase, and 0.4 to By gradually increasing to about 0.5, the opening / closing body 8 can be opened and closed at a low speed.

The value of the drive voltage V _DS at the end of the start phase can be a predetermined value, or can be adjusted according to the time until the rotation of the DC motor 1 starts, that is, the length of the start phase. Good.
As described above, the control means 7 can measure the period of the rotation signal r that arrives after the start of the start phase, and can measure the time from the start of the start phase until a predetermined number of rotation signals are detected. it can. When this time is shorter than the predetermined time, it can be determined that the load of the DC motor 1 is small, and when the time is long, the load is large. It is also possible to set and select a speed control pattern thereafter.

For example, as shown in FIG. 4A, when the n rotation signals r ₁ to r _n are received, the start phase is finished (t _S1 ), and the drive voltage V _D of the DC motor 1 is set to V Set to _DS1 and _enter the acceleration phase. On the other hand, as shown in FIG. 5B, when n rotation signals r are received within a time (t _S2 ) shorter than the time t _S1 , it is determined that the load is light and the The driving voltage V _DS2 smaller than V _DS1 can be set to shift to the acceleration phase. Furthermore, the rate of gradually increasing the drive voltage in the subsequent acceleration phase can be changed according to the load weight. By these controls, the opening / closing body 8 can be reliably accelerated from a low speed regardless of the mass of the opening / closing body 8, the magnitude of static friction, and the change thereof.

The value of the drive voltage V _DS at the above startup phase ends, the rotational speed of the DC motor 1 may be adjusted so as not to change significantly before and after the end of the startup phase. Since the control means 7 can know the rotation speed of the DC motor 1 at the end of the start phase by measuring the period of the rotation signal r coming to the start phase, the rotation speed of the DC motor 1 before and after the end of the start phase. it is possible to adjust the value of the driving voltage V _DS so as not to change significantly. Control means 7, for example startup phase may be set to the driving voltage V _DS that is determined in advance in accordance with the rotational speed at the end, so as to adjust the driving voltage by the period of the rotation signal r after startup phase end Also good.

(Control method)
FIG. 5 is a flowchart showing an example of a control method in the startup phase of the opening / closing body control device for a vehicle. The control means 7 controls the DC motor 1 by PWM control.
When the open / close body 8 is fully closed and the open switch 6a is pressed, or when the open / close body 8 is fully open and the close switch 6b is pressed, or when the open / close body 8 is in the intermediate position, either switch is pressed. When this is done, an opening / closing instruction is issued (S10, S11).
Depending on whether the opening / closing instruction moves the opening / closing body in the opening direction or in the closing direction, a forward rotation signal or a reverse rotation signal is output to the polarity switching circuit 4 to set the rotation direction of the DC motor 1 (S12).

Next, the drive signal d is output with the duty ratio D ₀ for supplying the drive voltage V _D0 which is a substantially rated voltage of the DC motor 1 (S13). As a result, the DC motor 1 is started. Driving signal d is output by the duty ratio D ₀ between the startup phase.

At the same time as the above driving is started, a timer is started to start timing (S14). The rotation signal r output from the rotation sensor 2 is detected when the DC motor 1 starts rotating (S15), the number of rotation signals r is counted, and the DC motor 1 is rotated a predetermined number of times (S16). .
The time (t _S ) required until a predetermined number n of rotation signals r are detected by the timer is measured, and as described above, the driving voltage V _DS of the DC motor 1 at the end of the start-up phase is set according to the time. be able to. Specifically, selecting the duty ratio _{D S} corresponding to the driving voltage _{V DS} (S17). For example, if the time t _S is 500 ms, the duty ratio is selected as D _S1 , and if it is 200 ms, it is selected as D _S2 (D _S1 > D _S2 ).
Then, it outputs a drive signal d by the selection duty ratio _{D S} (S18).

In the acceleration phase following the start-up phase, the drive voltage can be increased by increasing the duty ratio with time, and the opening / closing body 8 can be accelerated by increasing the rotational speed of the DC motor 1 accordingly.
After the DC motor 1 is started, the starting phase (starting period) can be several tens to several hundreds ms, and the acceleration phase can be several seconds.

It is a block diagram which shows the structure of the opening / closing body control apparatus for vehicles of this invention. It is a graph for demonstrating the control pattern example of the drive voltage of the starting phase by the opening / closing body control apparatus for vehicles, and the subsequent DC motor. It is a graph for demonstrating the control action in the starting phase of the opening / closing body control apparatus for vehicles. It is a graph for demonstrating the example of control which sets the drive voltage at the time of completion | finish of a starting phase with the length of the starting period of the opening / closing body control apparatus for vehicles. It is a flowchart which shows the example of control in the starting phase of the opening / closing body control apparatus for vehicles. It is a graph which shows the example of a speed control pattern of the conventional vehicle opening-closing body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; DC motor, 2; Rotation sensor, 3: Motor power supply, 4; Polarity switching circuit, 5; Drive circuit, 6: Operation switch, 7: Control means, 8: Opening and closing body, d: Drive signal, r; Signal, V _D ; drive voltage.

Claims (5)

A vehicle opening / closing body control device for driving an opening / closing body mounted on a vehicle by a DC motor and controlling the opening / closing body to start opening / closing at a low speed,
Control means for sending a drive signal for controlling the drive voltage of the DC motor;
A drive circuit for applying the drive voltage to the DC motor in response to the drive signal;
A rotation sensor that outputs a rotation signal corresponding to the rotation of the DC motor to the control means;
With
The control means sets the drive voltage to a substantially rated voltage of the DC motor during a start-up period after receiving an opening / closing instruction from the operation switch until a predetermined number of the rotation signals are detected, and at the end of the start-up period, A vehicular opening / closing body control device that opens and closes the opening / closing body at the low speed by reducing a voltage.   2. The vehicle opening / closing body control device according to claim 1, wherein the control means sets the drive voltage at the end of the start-up period according to the length of the start-up period.   The vehicle opening / closing body control device according to claim 1 or 2, wherein the control means reduces the drive voltage at the end of the start-up period so that the speeds of the open-close bodies are substantially the same before and after the end of the start-up period. .   The vehicle opening / closing body control device according to any one of claims 1 to 3, wherein the opening / closing body is either a power window or a sunshade.   The vehicle opening / closing body control device according to any one of claims 1 to 3, wherein the opening / closing body is either a sunroof or a movable roof.

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