JP3187250B2 - Motor actuator control device for automotive air conditioner - 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 actuator control device for an air conditioner for a vehicle having an intake door and an air mix door each driven by a motor.

[0002]

2. Description of the Related Art Conventionally, in this type of apparatus, a duty ratio control of a drive signal to a motor actuator for driving an intake door (intake door actuator) or a motor actuator for driving an air mix door (air mix door actuator) is performed. There are things. In the case of the former, the internal air circulation (REC) is performed during the automatic control.
This is performed in order to prevent the abrupt change in the blowout temperature when switching from the to the outside air introduction (FRE), and in the latter case, in order to prevent overrun when stopping the air mix door at the target position.

In the duty ratio control, a drive signal to a DC motor in an actuator is pulsed to apply a pulse-like voltage. Conventionally, however, the on-time P of the pulse drive signal to the motor and the pulse are applied. The ratio to the cycle R (= ON time P + OFF time Q) (this is called a duty ratio) was fixed to a constant value (see FIG. 7). For example, in the case of an intake door actuator, P = 30
msec, Q = 970 msec, and the duty ratio is 3% (=
{30 / (30 + 970)} × 100). In the case of an air-mix door actuator, P = 4
0 msec, Q = 10 msec, and the duty ratio is 80% (=
{40 / (40 + 10)} × 100).
When the duty ratio control is performed, the applied voltage to the DC motor (in this case, the average applied voltage) decreases, so that the rotation speed of the motor decreases as well as the driving force (output torque) decreases. Therefore, the intake door slowly moves from the inside air circulation (REC) position to the outside air introduction (FRE) position, thereby preventing a sudden change in the blow-out temperature. In addition, the air mix door is decelerated immediately before reaching the target position, so that overrun is performed. Is prevented.

[0004]

However, where the duty ratio control generally reduces the output torque of the motor as described above, the conventional duty ratio control described above takes into account the load torque of the door. Since the motor actuator is always operated at a constant duty ratio without performing the operation, if the load torque of the door increases and becomes equal to or more than the output torque of the motor, the door may not move during the duty ratio control. For example, if the load torque for moving the door increases due to aging,
When the load torque of the door (especially the intake door) increases due to the ram pressure during high-speed driving, etc., when the fan speed is at the maximum, the load torque of the door (especially the air mix door) is affected by the wind speed. In the case of a rise, for example, there is a possibility that a motor torque shortage occurs and a door malfunction occurs.

[0005] Japanese Patent Laid-Open No. Hei 5-178067 discloses a technique for changing the duty ratio in the drive control of the intake door according to the turning direction and the wind speed of the traveling wind. However, this technique is merely intended to make the operating speed of the intake door constant regardless of the wind speed or the rotating direction. Therefore, even with this technique, the unit side (door) may change due to aging or the like. The possibility that the door malfunctions when the load on the door becomes large is still denied.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and is intended for an automobile which can surely move an intake door or an air mix door even when the load torque of the door increases. An object of the present invention is to provide a motor actuator control device for an air conditioner.

[0007]

In order to achieve the above object, a motor actuator control device according to the present invention comprises a motor for driving a door disposed in a unit, and a position detecting device for detecting a rotational position of the motor. Means for controlling the duty ratio of the drive signal when the motor does not reach the target position within a predetermined time when the duty ratio of the drive signal to the motor is controlled.

As a method for increasing the duty ratio of the drive signal, when the motor does not reach the target position within a predetermined time, the duty ratio is increased to a predetermined value, or the duty ratio is increased stepwise as time elapses. Or the duty ratio is increased in proportion to the passage of time.

According to another aspect of the present invention, there is provided a motor actuator control device comprising: a motor for driving a door disposed in a unit; a position detecting means for detecting a rotational position of the motor; and a duty signal for driving the motor. When performing the ratio control, when the same rotational position signal is continuously output from the position detecting means, the control means increases the duty ratio of the drive signal.

As a method of increasing the duty ratio of the drive signal, when the same rotation position signal is continuously output from the position detection means, the duty ratio is increased to a predetermined value or the duty ratio is increased. The duty ratio is increased stepwise as time elapses, or the duty ratio is increased in proportion to elapse of time.

[0011]

In the motor actuator control device configured as described above, the control means controls the duty ratio of the drive signal to the motor when the motor does not reach the target position within a predetermined time, or When the same rotation position signal is continuously output from the detection means,
For example, it is determined that the load torque of the door has increased due to aging, the influence of ram pressure, or the effect of high wind speed, and the duty ratio of the drive signal is increased. And even if the load torque of the door increases, the door can be reliably moved against this.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of one embodiment of the present invention. A main body 1 of an air conditioner for a vehicle shown in FIG. 1 has an intake unit 2 for selectively taking in outside air or inside air, a cooling unit 3 for cooling intake air, and a cooling unit 3 for taking in intake air. And a heater unit 4 that blows out the conditioned air into the vehicle compartment after harmoniously controlling the temperature.

The intake unit 2 is provided with an outside air intake 5 for taking in outside air and an inside air intake 6 for taking in inside air, and a connection portion between these intakes 5 and 6 has a ratio of outside air and inside air taken into the unit. The intake door 7 for adjusting the rotation angle is provided rotatably. The intake door 7 is rotated via a link (not shown) by an intake door actuator 8 constituted by a motor actuator as described later. The intake unit 2 has a fan 10 rotated at a predetermined speed by a fan motor 9. The rotation of the fan 10 selectively sucks outside air or inside air from the outside air intake 5 or the inside air intake 6 according to the position of the intake door 7, and varies the voltage applied to the fan motor 9 to change the fan 10. By changing the rotation speed of the vehicle, the amount of air blown into the vehicle interior is adjusted. When the intake door 7 is at the position A in the figure, the intake port is for external air introduction (FRE), and when it is at the position B in the figure, it is for internal air circulation (REC).

An evaporator 11 constituting a refrigeration cycle is provided in the cooling unit 3, and the evaporator 1 is turned on by turning on a compressor (not shown).
1 is supplied with a refrigerant, and the intake air is cooled by heat exchange with the refrigerant.

A heater core 12 for circulating engine cooling water is provided in the heater unit 4. The amount of air passing through the heater core 12 and the amount of air bypassing the heater core 12 are located upstream of the heater core 12. The air mix door 13 for adjusting the ratio of the air is provided rotatably. This air mix door 13 is also rotated via a link (not shown) by an air mix door actuator 14 composed of a motor actuator as described later. By changing the opening degree of the air mix door 13, the mixing ratio of the warm air heated by the heat exchange with the engine cooling water through the heater core 12 and the unheated cool air bypassing the heater core 12 is varied. The temperature of the air blown into the room is adjusted. The temperature-controlled air is supplied to the differential outlet 15, vent outlet 16, and foot outlet 1.
7 is supplied into the vehicle cabin through one of the outlets. A differential door 18, a vent door 19, and a foot door 20 are rotatably provided at these outlets 15 to 17, respectively, and are rotated by a mode door actuator such as a motor actuator (not shown) via a link (not shown). The outlet mode is arbitrarily set by combining the open / close states of the outlets 15-17.

As described above, the intake door actuator 8 is constituted by a motor actuator. The motor 21 for driving the intake door 7 and the encoder 2 serving as position detecting means for detecting the rotational position of the motor 21 are provided.
2 and built-in. The motor 21 is a DC motor,
The driving force (output torque) and the rotation speed change according to the applied voltage (average applied voltage in the case of duty ratio control). Encoder 22 is preferably a rotary encoder,
It rotates in conjunction with the motor 21 and outputs its position signal in the form of a digital code signal. The position detecting means for the intake door actuator 8 is not limited to the encoder, but may be a position detecting switch having several contacts formed in an appropriate pattern.

Further, as described above, the air mix door actuator 14 is also constituted by a motor actuator, and a motor 23 for driving the air mix door 13 is provided.
And an encoder 24 as position detecting means for detecting the rotational position of the motor 23. Then, as in the case of the intake door actuator 8, the motor 23
Is a DC motor whose driving force and rotation speed change in accordance with the applied voltage, and the encoder 22 is also preferably a rotary encoder, which rotates in conjunction with the motor 23 and converts the position signal into a digital code signal. To output. The position detecting means for the air-mix door actuator 14 is not limited to the encoder, but may be a variable resistor (PBR) that converts the air-mix door opening into a voltage value.

The motor actuators 8 and 14 are connected to a control device 25 as control means. The control device 25 has an air conditioner switch 26 for operating the compressor and a suction port fixed to the internal air circulation (REC). REC switch 27 and OFF to stop all systems and fix the intake port to the outside air introduction (FRE)
A switch 28, a temperature setting switch 29 for setting the temperature of the occupant to a desired temperature, and an inside air sensor 30 for detecting the temperature in the passenger compartment.
, An outside air sensor 31 for detecting the outside air temperature, a suction temperature sensor 32 for detecting the air temperature immediately after passing through the evaporator 11 (hereinafter referred to as a suction temperature), a solar irradiation sensor 33 for detecting the amount of solar radiation, and a vehicle-mounted battery (rated 12 V). ) 34 are connected to each other. Each of the switches 26 to 29 is disposed at a predetermined position on the instrument panel, and each of the sensors 30 to 33 and the battery 34 is disposed at an appropriate predetermined position of the vehicle.

The control device 25 includes switches 26 to
29, an input signal processing unit 35 for processing input signals from the sensors 30 to 33, and a CPU for executing various arithmetic processing
36, a memory 37 as a storage medium, an output signal processing unit 38 for processing an output signal from the CPU 36, and a power supply circuit 39 for transforming the voltage of the battery 34 and stably supplying it to each unit. ing. The CPU 36 has a timer 4
0 is built in. The input signal processing unit 35
/ D converter. The memory 37 is composed of a ROM and a RAM. The ROM stores, in addition to the operation program of the CPU 36, control characteristic data for variable duty ratio control described later. The encoders 22 and 24 in the motor actuators 8 and 14 are respectively CPU
36, and the output signal processing unit 38
In accordance with the signal from the power supply circuit 36, the power supply circuit 39 until the motors 21 and 23 (or the doors 7 and 13) reach the target position.
The intake door actuator 8 and the air mix door actuator 1
4 is applied to each of the motors 21 and 23.

The control device 25 having the above-described configuration is controlled by the built-in CPU 36 by means of the switches 26 to 29.
And input signals of sensors 30-33, etc.
It comprehensively controls the intake door actuator 8, the air mix door actuator 14, the mode door actuator, the fan motor 9, the compressor, and the like. Taking the control of the intake door actuator 8 (suction port control) and the control of the air mix door actuator 14 (blow-out temperature control) as an example, during automatic control, the CPU 36 sets, for example, the set temperature of the temperature setting switch 29 and A value of a predetermined control parameter is calculated from the vehicle interior temperature, the outside air temperature, the suction temperature, and the amount of solar radiation which are the detection values of the sensors 30 to 33, and a target opening degree of the air mix door 13 is calculated based on the calculated value. Further, outside air or inside air is selected according to the target air mix door opening. And encoder 2
The signals to the motors 21 and 23 in the intake door actuator 8 and the air mix door actuator 14 are controlled so that the intake door 7 and the air mix door 13 come to the target positions while comparing and calculating the position signals from the position signals 2 and 24. I do.

In the present embodiment, as in the prior art, in the control of the intake door actuator 8 and the air mix door actuator 14, the drive signal to each of the motors 21 and 23 in these actuators 8 and 14 is subjected to a duty ratio under a certain condition. Controlling. That is, when the intake port is switched from the inside air circulation (REC) to the outside air introduction (FRE) at the time of automatic control, the intake door actuator 8 is used to prevent the outlet temperature from suddenly changing.
In order to prevent the overrun when the air mix door 13 is stopped at the target position, the application of the voltage to the motor 23 in the air mix door actuator 14 is controlled by the duty ratio control of the application of the battery voltage to the motor 21 in the inside. The duty ratio is controlled. At this time, each motor 21, 2
The drive signal to No. 3 is composed of a periodic pulse obtained by controlling the ratio (duty ratio) of the time P for turning on the application of the battery voltage (12 V) to the pulse period R (= on time P + off time Q). (See FIG. 7). As a result, the battery voltage is applied to the motors 21 and 23 only during the ON time P, so that the average applied voltage decreases, and the motors 21 and 23
Rotation speed decreases. As a result, the intake door 7 slowly introduces outside air (FR) from the inside air circulation (REC) position.
E) The air mixing door 13 moves to the position to prevent a sudden change in the blowout temperature, and the air mix door 13 slowly moves to the target position to avoid overrun. During control other than the above conditions, the battery voltage (12 V) is continuously applied to the motors 21 and 23 (hereinafter referred to as DC control).

At the time of the duty ratio control, the duty ratio is not fixed to a constant value as in the related art.
When it is determined that the doors 7 and 13 are not moving (that is, malfunction), the value of the duty ratio is variably controlled with time. Specifically, at the time of duty ratio control,
When the motors 21 and 23 (or the doors 7 and 13) do not reach the target position within a predetermined time (for example, 30 seconds) (first embodiment), or when the same position signal is output from the encoders 22 and 24. Is continuously output (second embodiment), it is determined that the doors 7 and 13 are not moving due to insufficient torque of the motors 21 and 23, and the output torque of the motors 21 and 23 is , 13 so as to be equal to or more than the load torque.
The output torque of the motors 21 and 23 is increased by increasing the duty ratio of the pulse drive signal to the motors 1 and 23.

Embodiment 1 The flowchart shown in FIG. 2 is an example of the above-described duty ratio variable control.
10 is a flowchart of a control method for increasing the duty ratio of a pulse drive signal to the motors 21 and 23 when the doors 1 and 23 (or the doors 7 and 13) do not reach a target position within a predetermined time.

First, the controller 25 causes the CPU 36 to
It is determined whether a drive signal to each of the motors 21 and 23 in the intake door actuator 8 or the air mix door actuator 14 is to be subjected to duty ratio control (S1). For example, in the case of the intake door 7, the duty ratio control is performed when the intake port is switched from the inside air circulation (REC) to the outside air introduction (FRE) during the automatic control, and in the case of the air mix door 13, the automatic control is performed. At this time, it is determined that the duty ratio control is performed when stopping the air mix door 13 at the target position.

When the duty ratio control is not performed as a result of the determination in S1, for example, in the case of the intake door 7, when the suction port is switched from the outside air introduction (FRE) to the inside air circulation (REC), In such a case, for example, when the air mix door 13 is moved toward the target position, the control device 25
Normal DC control is performed via the control unit 8 to continuously apply the battery voltage (12 V) to the motors 21 and 23 in the actuators 8 and 14 (S2). Then, based on signals from the encoders 22 and 24, the motors 21 and 23
When it is detected that the door (or the door 7, 13) has reached the target position, the output to the motors 21, 23 is turned off (S
8).

On the other hand, when the duty ratio control is performed as a result of the determination in S1, the control device 25
At 36, the motors 21, 2 in the actuators 8, 14
3 is set to an initial value (for example, 3% in the case of the intake door 7 and 80% in the case of the air mix door 13 according to the conventional example) and output. The timer 40 is started (S3), and then the motor 2 is controlled based on the position signals from the encoders 22 and 24 in the actuators 8 and 14.
It is determined whether the first and second doors 23 (or the doors 7 and 13) have reached the target position (S4).
(Second) has elapsed (S5). That is, it is determined whether the motors 21 and 23 (or the doors 7 and 13) have reached the target position within a predetermined time (30 seconds). If the target position has been reached within the predetermined time (30 seconds) as a result of the determination in S4, the output to the motors 21 and 23 is turned off (S8).

On the other hand, if the time is up as a result of the determination in S5, that is, if the motors 21, 23 (or the doors 7, 13) have not reached the target position within a predetermined time (30 seconds), the motor 21 , 23 are controlled to increase the duty ratio of the pulse drive signal (S6). The variable control of the duty ratio is performed by the motor 2 based on the position signals from the encoders 22 and 24 in the actuators 8 and 14.
The process is repeated until the arrival of the target position of the motors 1, 23 (or the doors 7, 13) is detected (S7). The output is turned off (S8).

3 to 5 show specific examples of the content of the duty ratio variable control in S6, and illustrate the case of controlling the intake door 7. FIG. That is, when the motor 21 (or the intake door 7) has not reached the target position within the predetermined time (30 seconds) (S4, S5), the duty ratio of the pulse drive signal to the motor 21 is immediately changed to the predetermined value ( 100%) (see Figure 3), or
The duty ratio of the pulse drive signal to the motor 21 is increased stepwise to, for example, 100% in accordance with the passage of time (see FIG. 4), or the duty ratio of the pulse drive signal to the motor 21 is changed over time. , For example, to 100% (see FIG. 5). Considering the purpose of adopting the duty ratio control, it is desirable to suppress the increase of the duty ratio as much as possible. Therefore, the method of FIG. 4 or 5 is preferable among the above methods. These control characteristic data are stored in the ROM of the memory 37 in advance.

In the method of FIG. 4 in which the duty ratio is increased stepwise, the case where the duty ratio is set in four stages from, for example, 3% to 100% is illustrated, but the duty ratio intermediate values d1, d2, and The duty ratio switching times t1, t2, and t3 are set within a range in which the output of the motor 21 does not cause a torque shortage with respect to an increase in the load torque of the intake door 7, in consideration of the vehicle type, the weight of the door, and the like. So that the moving speed of the
An appropriate value may be set by an experiment. For example, d
1 = 40%, d2 = 70%, t1 = 10 seconds, t2 = 20
Second, t3 = 30 seconds. In addition, the number of control steps is not limited to four steps, and may be controlled, for example, to two or three steps, or may be controlled to other multiple steps. In this case, the number of control steps may be appropriately determined by experiments so as to be optimal in terms of control simplicity and effects.

In the method of FIG. 5 in which the duty ratio is linearly increased, the duty ratio is increased from 3% to 100% during the time t0, for example. Similarly, taking the vehicle type and the weight of the door into consideration, the moving speed of the intake door 7 is as slow as possible within a range where the output of the motor 21 does not cause a torque shortage with respect to an increase in the load torque of the intake door 7. Thus, an appropriate value may be set by experiments. For example, it is assumed that t0 = 30 seconds.

When the method shown in FIGS. 4 and 5 is applied to the control of the air mix door 13, the initial value of the duty ratio is 80% according to the conventional example. In this case, since the initial value is high (80%), the number of steps in the step control (see FIG. 4) is preferably two or three less than four.

Embodiment 2 The flowchart shown in FIG. 6 is another example of the above-described duty ratio variable control, in which the same position signal is continuously output from the encoders 22 and 24 during the duty ratio control. 6 is a flowchart of a control method for increasing a duty ratio of a pulse drive signal to the motors 21 and 23.

First, similarly to the first embodiment shown in FIG. 2, the control device 25 uses the CPU 36 to control the intake door actuator 8 or the air mix door actuator 1 by the CPU 36.
It is determined whether the duty ratio control is performed on the drive signals to the motors 21 and 23 in Step 4 (S10). If the duty ratio control is not performed as a result of this determination, the output signal processing unit 38 Normal DC control is performed, a battery voltage (12 V) is continuously applied to the motors 21 and 23 in the actuators 8 and 14 (S11), and the signals from the encoders 22 and 24 are used for the motors 21 and 23.
When it is detected that the door (or the door 7, 13) has reached the target position, the output to the motors 21, 23 is turned off (S1).
6).

On the other hand, when the duty ratio control is performed as a result of the determination in S10, the control device 25
At U36, the motor 21 in the actuators 8, 14
The duty ratio of the pulse drive signal to 23 is set to an initial value (for example, 3% in the case of the intake door 7 and 80% in the case of the air mix door 13) and output, and the encoders 22, 24 in the actuators 8, 14 are output. It is determined whether or not the motors 21 and 23 (or the doors 7 and 13) have reached the target position based on the position signal from the controller (S12). Further, the same position signal is output from the encoders 22 and 24 for a predetermined time (for example, 10 seconds). It is determined whether the output is continued (S13). That is, it is determined whether the motors 21 and 23 (or the doors 7 and 13) are not moving before reaching the target position. If it has reached the target position as a result of the determination in S12, the output to the motors 21 and 23 is turned off (S16).

On the other hand, if the same signal continues as a result of the determination in S13, it is determined that the motors 21 and 23 (or the doors 7 and 13) are not moving before reaching the target position. To increase the duty ratio of the pulse drive signal to the motors 21 and 23 (S1).
4). The specific contents of the duty ratio variable control are as follows.
This is the same as the control method described in S6 of the embodiment (see FIGS. 3 to 5). The control of S14 is performed by the actuators 8, 14
The process is repeated until the arrival of the target position of the motors 21 and 23 (or the doors 7 and 13) is detected based on the position signals from the encoders 22 and 24 (S15).
When the door 3 (or the doors 7, 13) reaches the target position, the output to the motors 21, 23 is turned off (S16).

Therefore, according to the present embodiment, the malfunction of the intake door 7 or the air mix door 13 during the duty ratio control is detected by the motors 21 and 23 (or the doors 7 and 13) within a predetermined time (30 seconds). Not reaching the target position (first embodiment) or the encoder 22,
It is recognized by detecting that the same position signal is continuously output (for 10 seconds) from the motor 24 (second embodiment). In these cases, the output torque of the motors 21 and 23 is As the output torque of the motors 21 and 23 is increased by increasing the duty ratio of the pulse drive signals to the motors 21 and 23 with the passage of time so that the load torque becomes equal to or more than the load torque of the motor 13, Even if the load torque of the doors 7 and 13 increases due to the influence of the ram pressure at the time of running, the wind speed at the time of the maximum fan speed, and the like, the doors 7 and 13 can be reliably moved in response to the increase. Thus, the reliability of the operation of the intake door 7 and the air mix door 13 is improved.

At this time, in the control shown in FIG.
Immediately upon detecting the occurrence of malfunction, the duty ratio is set to 1
Since it is set to 00%, there is an advantage that a reaction after a malfunction occurs is quick.

In the control (step control) shown in FIG. 4, the duty ratio is increased stepwise with the passage of time when the occurrence of operation failure is detected. The doors 7, 13 can be moved smoothly again.

Further, the control (linear control) shown in FIG.
In this case, when the occurrence of operation failure is detected, the duty ratio is increased linearly with time, so that the doors 7 and 13 are re-driven more smoothly than in the case of the control of FIG. Besides the door 7,
There is an advantage that power for re-driving the motor 13 can be minimized.

In this embodiment, the initial value of the duty ratio of the pulse drive signal to the motors 21 and 23 is set to 3% for the intake door 7 and to 80% for the air mix door 13 according to the conventional example. Although it is set, it is not limited to this and may be set appropriately.

[0041]

According to the present invention, as described above, in the case where the duty ratio of the drive signal to the motor is controlled, when the motor does not reach the target position within a predetermined time, or when the position detection means is used. If the same rotational position signal is continuously output from the controller, it is determined that the load torque of the door has increased due to, for example, aging, the influence of ram pressure, or the effect of high wind speed, and the duty ratio of the drive signal is reduced. As the duty ratio increases, the output torque of the motor increases in accordance with the increase in the duty ratio, and even if the load torque of the door increases, the door can be reliably moved against this, and the intake door and The reliability of the operation of the air mix door is improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a motor actuator control device of the present invention.

FIG. 2 is a flowchart of an embodiment of variable duty ratio control.

FIG. 3 is a control characteristic diagram showing an example of variable duty ratio control.

FIG. 4 is a control characteristic diagram showing another example of the duty ratio variable control.

FIG. 5 is a control characteristic diagram showing still another example of the duty ratio variable control.

FIG. 6 is a flowchart of another embodiment of variable duty ratio control.

FIG. 7 is a diagram for describing duty ratio control;

[Explanation of symbols]

7 ... intake door 8 ... intake door actuator (motor actuator) 13 ... air mix door 14 ... air mix door actuator (motor actuator) 21, 23 ... motor 22, 24 ... encoder (position detection means) 25 ... control device (control means) )

Claims (8)

(57) [Claims] 1. A motor (21, 23) for driving a door (7, 13) disposed in a unit, and position detecting means for detecting a rotational position of the motor (21, 23).
(22, 24), and when the drive signal to the motor (21, 23) is duty-ratio controlled, if the motor (21, 23) does not reach the target position within a predetermined time, A motor actuator control device for an air conditioner for a vehicle, comprising: control means (25) for increasing a duty ratio. 2. The control means (25) includes: a motor (21, 2);
3. The method according to claim 1, wherein the duty ratio is increased to a predetermined value when the motor (21, 23) does not reach the target position within a predetermined time in a case where the drive signal to the control unit is controlled in a duty ratio. Motor actuator control device. 3. The control means (25) is provided with the motor (21, 2).
3) When the motor (21, 23) does not reach the target position within a predetermined time when the drive signal to the drive signal is duty-ratio controlled, the duty ratio is increased stepwise as time elapses. The motor actuator control device according to claim 1, wherein 4. The control means (25) is provided with the motor (21, 2).
3) When the motor (21, 23) does not reach the target position within a predetermined time when the driving signal to the duty ratio is controlled, the duty ratio is increased in proportion to the passage of time. The motor actuator control device according to claim 1. 5. A motor (21, 23) for driving a door (7, 13) disposed in a unit, and position detecting means for detecting a rotational position of the motor (21, 23).
(22, 24) and the duty ratio control of the drive signal to the motor (21, 23), when the same rotational position signal is continuously output from the position detecting means (22, 24). And a control means (25) for increasing the duty ratio of the drive signal. A motor actuator control device for an air conditioner for a vehicle, comprising: 6. The control means (25) is provided with the motor (21, 2).
In the case where the drive signal to (3) is subjected to duty ratio control, the duty ratio is increased to a predetermined value when the same rotational position signal is continuously output from the position detecting means (22, 24). The motor actuator control device according to claim 5, wherein 7. The control means (25) is provided with the motor (21,2).
3) When the same rotation position signal is continuously output from the position detection means (22, 24) in the case where the drive signal to (3) is controlled by the duty ratio, the duty ratio is increased stepwise according to the elapse of time. 6. The motor actuator control device according to claim 5, wherein the motor actuator is raised. 8. The control means (25) is provided with the motor (21,2).
3) When the same rotational position signal is continuously output from the position detecting means (22, 24) in the case of controlling the drive signal to the duty ratio, the duty ratio is increased in proportion to the passage of time. The motor actuator control device according to claim 5, wherein: