JPH10213155A - Clutch control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure stable rotation without rotating speed fluctuation of a driving device being transmitted to a driven device at the time of locking a clutch and effectively reduce vibrating sound generated by fluctuation. SOLUTION: In a clutch control device provided with a rotating speed sensor 340 for detecting the rotating speed of an engine, a driven shaft rotating speed sensor 330 for detecting the rotating speed of an input shaft input shaft of a driven device, and a means for setting the target rotating speed of the input shaft based on the minimum rotating speed within the specified time or within the specified rotating quantity in the rotating speed detected by the rotating speed sensor 340. The difference between the set target rotating speed and the rotating speed of the input shaft is obtained, and the transmission torque value of a clutch is controlled so that the difference becomes small. When the clutch is an electrostatic type clutch, its transmission torque value is controlled by applied voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch control device, and more particularly to a clutch control device for connecting / disconnecting a driven device such as a gasoline engine or a diesel engine and a driven device such as a transmission, an auxiliary machine for a vehicle, and a generator. Related to the device.

[0002]

2. Description of the Related Art Conventionally, hydraulic clutch devices and electromagnetic clutch devices have been known as vehicle clutch devices capable of controlling transmission force.

[0003] Among such clutch devices, a hydraulic clutch device mechanically presses a clutch disk of a driven member with hydraulic pressure against a driving member that rotates integrally with a drive shaft.
The transmission force is generated by the frictional force between the two (see JP-A-2-38724). The device disclosed in Japanese Patent Application Laid-Open No. 2-87724 detects a rotational speed difference between a driving member and a driven member, and controls a transmission force by controlling hydraulic pressure so that the rotational speed difference quickly becomes zero. ing.

Further, the electromagnetic clutch device has a coil disposed on a driving member which rotates integrally with a driving shaft, an electromagnetic powder is interposed between the driving member and the driven member, and the power supply to the coil is controlled. The transmission force is controlled by the electromagnetic force between the two (see Japanese Patent Application Laid-Open No. 57-60921). Japanese Patent Application Laid-Open No. 57-60921 controls the transmission force by controlling the amount of energization in accordance with the engine speed corresponding to the gear position.

Further, Japanese Patent Application Laid-Open No. Hei 6-117455 discloses an electromagnetic clutch for a vehicle, which detects the vehicle speed, the engine speed, the shift position, the throttle opening, the brake state, and the like so that the engine can be started when the vehicle starts. A start control apparatus for a vehicle clutch has been disclosed in which a delay time until the clutch is connected is made variable in accordance with the number of revolutions, thereby performing smooth transmission.

[0006]

However, such a conventional hydraulic clutch device is a friction transmission in which the clutch disc is pressed by hydraulic pressure, and wear is unavoidable and requires periodic replacement of the friction member, thus requiring a low maintenance cost. Increases. Further, in the control, the transmission force is controlled by detecting the rotational speed difference between the driving member and the driven member and controlling the hydraulic pressure so that the rotational speed difference quickly becomes zero. When the difference is large, feedback control is performed so that the clutch transmission force is increased in order to quickly reduce the difference to zero, and the occurrence of longitudinal vibration of the vehicle is inevitable. It should be noted that there is no mention of specific control for the rotation speed fluctuation of the driving member when the clutch is engaged.

In the electromagnetic clutch device, there is no direct contact between the driving member and the driven member. However, during the slip control, heat is generated due to frictional contact between magnetic powders made of metal. Not suitable for Furthermore, it is not easy to wire lead wires for supplying electricity to the coil provided on the driving member, and it is difficult to manufacture the lead wires. Further, none of the above-mentioned publications of the electromagnetic clutch device mentions specific control for the fluctuation of the rotational speed of the drive member when the clutch is engaged.

In the engine, fluctuations in the number of revolutions (pulsations) occur due to fluctuations in fuel between cylinders, fluctuations in intake air amount between cylinders, disturbances (load fluctuations due to turning on / off auxiliary equipment for vehicles), and the like. It is known.

Japanese Patent Application Laid-Open No. 7-248033 discloses an electric control motion capable of controlling the transmission characteristics of a motion (stress, force, displacement, etc.) such as a rotary motion and a reciprocating motion by controlling the voltage application. A transmission method and device is disclosed, with a clutch suggested as one of its possible applications.

However, the one disclosed in Japanese Patent Application Laid-Open No. 7-248033 merely suggests the possibility of application to a clutch, and has no specific structure when applied to a clutch device for a vehicle. Not disclosed.

Accordingly, an object of the present invention is to pay attention to such a conventional problem, and it is possible to secure a stable rotation without transmitting a variation in the number of revolutions of a driving device to a driven device when a clutch is engaged. Another object of the present invention is to provide a clutch control device that can effectively reduce vibration noise generated by fluctuations.

[0012]

In order to achieve such an object, a clutch control device according to a first embodiment of the present invention is provided between a drive shaft of a drive device and an input shaft of a driven device. A control device for the clutch, wherein a drive shaft speed detecting means for detecting a speed of a drive shaft of the drive device, a driven shaft speed detecting means for detecting a speed of an input shaft of the driven device, Among the rotation speeds detected by the drive shaft rotation speed detection means, a minimum rotation speed within a predetermined time or within a predetermined rotation amount is obtained, and the target rotation speed of the input shaft of the driven device is determined based on the obtained minimum rotation speed. A target rotation speed setting unit to be set; and a difference between the target rotation speed set by the target rotation speed setting unit and the rotation speed of the input shaft detected by the driven shaft rotation speed detection unit, and the difference is reduced. So that the clutch And control means for controlling the reach torque value,
It is characterized by having.

Here, the target rotation speed setting means further compares the rotation speed detected by the drive shaft rotation speed detection device with the set target rotation speed, and the rotation speed is set to the set target rotation speed. When the rotation speed is lower than the rotation speed, a target rotation speed update setting unit that sets the rotation speed as a new target rotation speed may be provided.

Further, the clutch is a first rotating member which rotates integrally with a driving shaft of a driving device, and has at least one opposing surface provided with a fiber or a fiber assembly on a surface at a predetermined position. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the first rotating member faces at least one facing surface of the first rotating member with a predetermined gap therebetween. A second rotating member having at least one facing surface provided with fibers or fiber aggregates;
It is preferable that a voltage applying unit that applies a voltage between the first rotating member and the second rotating member is provided.
Further, a clutch control device according to a second embodiment of the present invention is a clutch control device provided between a drive shaft of a drive device and an input shaft of a driven device, wherein the control device of the drive shaft of the drive device is provided. A drive shaft rotation speed detecting means for detecting a rotation speed, and a rotation speed detected by the drive shaft rotation speed detection device,
A target rotation speed setting means for obtaining a minimum rotation speed within a predetermined time or within a predetermined rotation amount, and setting as a target rotation speed of the input shaft of the driven device based on the obtained minimum rotation speed; And control means for controlling the clutch so as to obtain a transmission torque value corresponding to the target rotation speed set by (1).

Here, the clutch is a first rotating member which rotates integrally with a drive shaft of a driving device, and has at least one opposed surface provided with fibers or fiber aggregates on a surface at a predetermined position. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the second rotating member faces at least one facing surface of the first rotating member with a predetermined gap. A second rotating member having at least one facing surface provided with fibers or fiber aggregates,
Voltage applying means for applying a voltage between the first rotating member and the second rotating member, and the control means adjusts the target rotation speed set by the target rotation speed setting means to It is preferable to include an applied voltage setting unit that sets a corresponding applied voltage, and a control unit that controls the voltage applying unit to the set applied voltage.

Further, a clutch control device according to a third aspect of the present invention is a clutch control device provided between a drive shaft of a drive device and an input shaft of a driven device, wherein the control device of the driven device is provided. A driven shaft rotation number detecting means for detecting the rotation number of the input shaft; and a minimum rotation number within a predetermined time or within a predetermined rotation amount among the rotation numbers detected by the driven shaft rotation number detecting means. Target rotation speed setting means for setting the minimum rotation speed as a target rotation speed of the input shaft of the driven device, and the clutch so as to have a transmission torque value corresponding to the target rotation speed set by the target rotation speed setting means. Control means for controlling, the control means further comprises:
The rotational speed of the input shaft detected by the driven shaft rotational speed detecting means is compared with the target rotational speed of the input shaft set by the target rotational speed setting means, and the rotational speed of the input shaft is calculated based on the target rotational speed. When the value is not small, the clutch is controlled so as to have a transmission torque value obtained by adding a predetermined amount to the transmission torque value.

Here, the clutch is a first rotating member which rotates integrally with a drive shaft of a drive device, and has at least one opposed surface provided with fibers or fiber aggregates on a surface at a predetermined position. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the second rotating member faces at least one facing surface of the first rotating member with a predetermined gap. A second rotating member having at least one facing surface provided with fibers or fiber aggregates,
Voltage applying means for applying a voltage between the first rotating member and the second rotating member, and the control means adjusts the target rotation speed set by the target rotation speed setting means to It is preferable to include an applied voltage setting unit that sets a corresponding applied voltage, and a control unit that controls the voltage applying unit to the set applied voltage.

Further, the control device for the clutch includes a vehicle speed detecting means for detecting a vehicle speed, and a maximum transmission torque value when the vehicle speed exceeds a predetermined low speed based on the vehicle speed detected by the vehicle speed detecting means. And switching means for switching the control means to operate when the vehicle speed is equal to or lower than a predetermined low speed.

According to the first embodiment of the present invention, the target rotation speed and the driven speed set based on the minimum rotation speed within a predetermined time or within a predetermined rotation amount among the rotation speeds detected by the drive shaft rotation speed detecting means are determined. The difference between the input shaft speed detected by the shaft speed detecting means and the input shaft speed is determined, and the transmission torque value of the clutch is controlled so as to reduce the difference. A stable rotation operation of the device can be obtained. Therefore, when the driven device is a transmission of a vehicle, it contributes to the running stability, and when it is a generator, it contributes to the stability of the generated voltage. In the case of a vehicle auxiliary machine, it contributes to improvement of output accuracy.

Further, the target rotation speed setting means further compares the rotation speed detected by the drive shaft rotation speed detection means with the set target rotation speed, and the rotation speed is set to the set target rotation speed. When the number of rotations is smaller than the number of rotations, when the target rotation number is set as a new target rotation number, the target rotation number is immediately updated when the rotation number decreases. Fluctuations can be further reduced.

Further, the clutch is a first rotating member which rotates integrally with a driving shaft of a driving device, and has at least one opposed surface provided with a fiber or a fiber assembly on a surface at a predetermined position. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the first rotating member faces at least one facing surface of the first rotating member with a predetermined gap therebetween. A second rotating member having at least one facing surface provided with fibers or fiber aggregates;
And a voltage applying means for applying a voltage between the first rotating member and the second rotating member, when the voltage applied from the voltage applying means is adjusted to the expected transmission torque value. When controlled, a first rotating member that rotates integrally with a drive shaft of the drive device, the first rotating member having at least one opposing surface provided with a fiber or a fiber aggregate on a surface at a predetermined position; A second rotating member that rotates integrally with the input shaft of the driven device, wherein at least one facing surface of the first rotating member faces with a predetermined gap, and fibers or fiber aggregates face the surface. A predetermined voltage is applied to the second rotating member having at least one facing surface provided. Then, a strong electric field is formed between the opposing surfaces of the first rotating member and the second rotating member, and an attractive force acts between the fibers or fiber aggregates. As a result, induced shear stress is generated between the first rotating member and the second rotating member, and a predetermined transmission torque acts between the first rotating member and the second rotating member. Therefore, the transmission torque value can be controlled only by controlling the applied voltage, and the control can be performed with good responsiveness and durability.

According to the second aspect of the present invention, the driven device is driven based on the minimum rotation speed among the rotation speeds detected by the drive shaft rotation speed detecting means for detecting the rotation speed of the drive shaft of the drive device. The clutch is controlled so as to have a transmission torque value corresponding to the target rotation speed set as the target rotation speed of the input shaft, so that only the rotation speed detection means of the drive shaft is sufficient, and the configuration and control can be simplified. .

Further, according to the third aspect of the present invention, of the rotation speeds detected by the driven shaft rotation speed detecting means for detecting the rotation speed of the input shaft of the driven device, within a predetermined time or within a predetermined rotation amount Is set as the target rotation speed of the input shaft of the driven device, the clutch is controlled so as to have a transmission torque value corresponding to the set target rotation speed, and is further detected by the driven shaft rotation speed detection means. The input shaft speed is compared with a set target speed of the input shaft. When the speed of the input shaft is smaller than the target speed, a transmission torque value obtained by adding a predetermined amount to the transmission torque value is obtained. Since the clutch is controlled as described above, only the means for detecting the rotation speed of the input shaft of the driven device is required, and the configuration and control can be simplified.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an example of a vehicle clutch to which the present invention is applied. In the figure, reference numeral 100 denotes an electrostatic clutch unit.

The electrostatic clutch unit 100 has a housing as a first rotating member fixed by bolts 95 so as to rotate integrally with a flywheel 90 fixed to the crankshaft 12 of the engine (not shown). The main component includes a rotor 120 and a rotor 110 as a second rotating member that is disposed so as to be rotatable relative to the housing 120. The rotor 110 is the input shaft 1 of the transmission 10
4 as described later.

The rotor 110 according to the present embodiment is basically made of a conductive material having a disk portion 111 and a cylindrical portion 112, and has a predetermined gap in an outer peripheral portion of the disk portion 111 in a housing 120 described later. And has a first opposing surface 111-1 facing the same.

The rotor 110 has its disk 111
In FIG. 2, a transmission 16 is fixed to a flange 16 formed on an input shaft 14 of the transmission 10 while being electrically insulated. That is, reference numeral 18 denotes a non-conductive washer provided between the disk portion 111 of the rotor 110 and the flange 16;
Is a non-conductive bush inserted into the hole of the flange 16, and the disk part 111 and the flange 16 are fixed with rivets 22 via these. 24 is an O-ring for sealing.

On the other hand, the housing 120 is basically
Housing member 121 and second housing member 122
Are formed by being overlapped with a rivet 125 with a sealing member 124 interposed therebetween, and a first disk portion 121-1 and a second disk portion 122-located on the disk portion 111 of the rotor 110, respectively. 1 and a first cylindrical portion 121-2 and a second cylindrical portion 122-2 at the center thereof.
Are formed. The input shaft 14 of the transmission 10 is inserted into the second cylindrical portion 122-2.
And the second cylindrical portion 12 of the second housing member 122
A bearing 130 and a seal member 132 are arranged between the inner peripheral surface of 2-2. As described above, the outer peripheral edges of the first housing member 121 and the second housing member 122
5 is fixed to the flywheel 90.

Further, the inner peripheral surface of the first cylindrical portion 121-2 of the first housing member 121 and the cylindrical portion 1 of the rotor 110
A bearing 134 and a seal member 136 are arranged between the outer peripheral surface of the bearing 12 and the outer peripheral surface of the bearing 12. In order to electrically insulate the rotor 110 and the housing 120, the outer ring of the bearing 134 and the first housing
A non-conductive sheet 138 is arranged between the inner peripheral surface of the cylindrical portion 121-2.

An electrostatic member 113 made of a fiber or a fiber assembly is bonded and fixed to the first facing surface 111-1 of the disk portion 111 of the rotor 110 with a conductive adhesive.
An electrostatic member made of a fiber or a fiber aggregate is provided on the first facing surface 121-1-1 of the first disk portion 121-1 of the housing 120 facing the first facing surface 111-1 of the rotor 110. 123 is adhered and fixed with a conductive adhesive.

The first facing surface 11 of the rotor 110
Between the electrostatic member 113 on the first surface 1-1 and the electrostatic member 123 on the first facing surface 121-1-1 of the housing 120, a very small gap X is formed when no voltage is applied. Have been.

As the fibers or fiber aggregates (electrostatic members) 113 and 123, natural fibers and synthetic fibers can be used, but when a voltage is applied, they are displaced in the opposite direction, and both are tangled and contacted. It is preferably of a nature, and for this reason, it is preferable to use a hair-tissue fabric (velvet or the like). In particular, it is preferable that the bristle of the surface of the hair-irradiated fabric (brushed fabric) is inclined with respect to the normal line of the surface.

Further, the chamber surrounded by the housing 120 is sealed with the above-mentioned sealing members 132 and 136 and the O-ring 24, and is filled with a gas or liquid having small electric conductivity. Any liquid may be used as long as it does not dissolve fibers or fiber aggregates, and mineral oil, animal and vegetable oils, synthetic oils, and the like can be used. In the present embodiment, silicone oil is filled.

The cylindrical portion 112 of the rotor 110 is
Are formed to protrude longer than the first cylindrical portion 121-2 of the housing member 121 of the housing member 121.
41 and 142 are in contact.

Next, the above-mentioned electrostatic clutch unit 1
A description will be given of a voltage application unit 200 that applies a voltage to 00 and a voltage application amount control unit 300 that controls the voltage application amount.

The voltage application means 200 includes a battery 210
And a voltage converter 220 capable of increasing the voltage of the battery 210 to several kV or more. The brush 14 having the positive side of the voltage converter 220 connected to the lead wire
1 through the rotor 11 surrounded by the housing 120
0, and the housing 120 is grounded through a brush 142 to the same potential as the engine 10 at zero potential.

The voltage application amount control means 300 is an electronic control unit (ECU) composed of a microcomputer or the like.
The ECU 310 is provided with a signal from a vehicle speed sensor 320 capable of detecting a vehicle speed from an output shaft of the transmission 10, for example. Also, the unit 100
Input shaft rotation speed sensor 330 capable of detecting the rotation speed of rotor 110 and housing 120
And the signal from the engine speed sensor 340 is also ECU
310 is input.

Thus, as will be described in detail later, ECU 310 determines a voltage value for obtaining a necessary clutch transmission force. Then, the voltage converter 220 is controlled to have the determined voltage value, and a predetermined voltage is applied between the conductive rotor 110 and the housing 120 via the brush 141.

The signals from the above-described vehicle speed sensor 320, transmission input shaft speed sensor 330, and engine speed sensor 340 may be provided only when necessary in the embodiments described later.

ECU 310 of voltage application amount control means 300
Is applied between the conductive rotor 110 and the housing 120 of the clutch unit 100 from the voltage converter 220, the electrostatic member 113 made of fiber or fiber aggregate on the rotor 110 side and the housing 120 An induced shear stress is generated between the fiber and the electrostatic member 123 made of a fiber aggregate, and a transmission force (transmission torque) is exerted between the two. At this time, when the fuzz on the surface of the brushed fabric is inclined with respect to the normal to the surface, the angle of the fuzz changes when a voltage is applied, and the rate of contact with the fiber of the opposing partner is changed. A large increase results in a large induced shear stress. As a result, a large transmission force can be obtained.

When the application of the voltage is stopped, the burr returns to the original inclined state, and the fiber or the fiber assembly on the rotor 110 side and the fiber or the fiber assembly on the housing 120 side are separated.
The initial gap X is formed, and the rotational force input from the flywheel 90 to the housing 120 is not transmitted to the rotor 110.

When the burr is inclined in this manner, the first opposing surface 121-1 of the housing 120 and the first
Since the distance from the opposing surface 111-1 can be shortened, the applied voltage can be reduced to obtain the same transmission force as that without tilting the burr. This is advantageous in terms of power consumption. In other words, if the applied voltage is the same, a larger shear stress, that is, a transmitting force can be obtained.

FIG. 2 shows functional blocks of an embodiment of the clutch control device including the electrostatic clutch unit 100. Reference numeral 311 denotes a target rotation speed setting means, among the rotation speeds detected by the engine rotation speed sensor 340.
A minimum rotation speed within a predetermined time or within a predetermined rotation amount is determined, and set as a target rotation speed of an input shaft of a transmission as a driven device based on the determined minimum rotation speed. 312 computing means for obtaining a difference between the rotational speed N _out of the input shaft detected by the target rotational speed N _in the transmission input shaft rotational speed sensor 330 set by the target rotational speed setting means 311, 313 has a small difference This is an applied voltage value setting means for setting an applied voltage value so as to obtain a transmission torque value of the clutch.

Next, an example of a control procedure of the vehicle clutch control device having the above configuration will be described with reference to a flowchart of FIG.
This will be described with reference to the timing charts of FIGS.

When the control is started, first, a signal from the engine speed sensor 340 is input, and a step S1 is executed.
At 51, it is determined whether the engine has rotated 1/4. This means, for example, that the pulse generated from the magnetic sensor is counted every time the crankshaft rotates once (count value = 9).
0). (Measurement per quarter rotation is based on the fact that one cycle of intake, compression, explosion, and exhaust per cylinder corresponds to one crankshaft.
This is because, in the case of a four-cylinder engine, an explosion cycle occurs every one-half rotation, so that measurement in a shorter cycle is sufficient to obtain fluctuations in the number of revolutions.
Therefore, in the case of a six-cylinder engine, the speed can be reduced to 1/6 rotation. However, depending on the capacity of the microcomputer used, the engine speed can be obtained every time,
Of course, this may be done. ) Step S
If it is determined in 151 that the engine has rotated 1/4, the process proceeds to step S152, and the time required for 1/4 rotation is measured. At the same time, this time is compared with the previous time (time stored during the previous 1/4 rotation), and the larger time (T90) is stored (set) in the register.

Then, in step S153, it is determined whether or not the engine has made one rotation, which is a predetermined rotation amount. This can be determined by detecting whether or not the count value of the counter for detecting one rotation of the engine, which counts up every quarter rotation, has reached four.

If it is determined in step S153 that the engine has made one revolution, the process proceeds to step S156, and the maximum time required for 1/4 revolution recorded in the register (T90)
, A minimum rotation speed N _min (rpm) in one rotation which is a predetermined rotation amount of the engine is obtained. This is because N _min =
60 / ((T90) × 4). Then, set the minimum rotational speed N _min that this determined as the target rotational speed N _in of the input shaft 14 of the transmission is driven axis. Further, in step S156, the above-described counter for detecting one revolution of the engine is reset.

If it is determined in step S153 that the engine has not made one revolution, step S15
Then, the program proceeds to step 4, wherein the engine speed N _eng at that time is obtained from the time required for 1/4 rotation, and this is compared with the target speed N _in . As a result of the comparison, when the engine speed N _{eng at} that time is larger than the target speed N _in , the process proceeds to step S155, and 1 is set in the counter for detecting one engine revolution.
Add (count up). However, when the engine speed N _{eng at} that time is smaller than the target speed N _in , the process proceeds to step S156, and the engine speed N _eng smaller than the target speed N _in is immediately set as the next target speed N _in. Set.

The control in step S154 is optional and can be omitted. If omitted,
When the answer is NO in Step S153, the process proceeds to Step S155. (FIG. 4 shows a timing chart when step S154 is omitted, and FIG. 5 shows a timing chart when step S154 is not performed.) In step S151, when the engine has not yet been rotated by 1/4, and in steps S156 and S15.
After 5, the process proceeds to step S157, in which a signal from the transmission input shaft rotation speed sensor 330 is input, and it is determined whether the transmission input shaft 14 as a driven shaft has rotated １ ／. This can be determined, for example, by counting the pulses generated from the magnetic sensor at each time of the transmission input shaft 14 as in the case of the crankshaft 12.

If it is determined in step S157 that the transmission input shaft 14 has rotated 1/4, the process proceeds to step S158, and the time required for the transmission input shaft 14 to rotate 1/4 is determined by the time required for the engine speed. The rotational speed N _out of the transmission input shaft 14 is obtained by the same calculation.

Then, in step S159, the difference between the target rotation speed N _in of the transmission input shaft 14 and the rotation speed N _out of the transmission input shaft 14 is determined.

Next, in step S160, and calculates the feedback amount of the electrostatic clutch unit 100 from the difference between the target speed N _in of the transmission input shaft 14 and its rotational speed N _out, the final applied voltage V Ask.
This final applied voltage V can be obtained as follows. That is,

[0054]

V = V _o + ΔV where V _o is the previously set applied voltage value (volt), ΔV
Is the feedback amount (volt).

The above-mentioned feedback amount can be obtained by a table method or a function operation method as described below.

[0056] In table method, for example, as shown in the graph of FIG. 6, the rotational speed N _out in advance the target rotational speed N _in
As a feedback voltage value ΔV is table corresponding to the difference between, are stored in a predetermined memory, predetermined feedback voltage ΔV from the difference between the rotational speed N _out the target rotation speed N _in the driven shaft is a table look-up Desired.

[0057] In the function operation mode, determined by calculation a feedback voltage value ΔV of the difference between the target rotational speed N _in the rotational speed N _out from empirical formula for a variable.

In any case, the target rotational speed N_inDriven from
Rotation speed N of transmission input shaft 14 as shaft
_out If the value obtained by subtracting is positive, the applied
Pressure value V _o To the feedback voltage value ΔV
It is set as the applied voltage value V. Target rotation speed N_inDriven from
Rotation speed N of transmission input shaft 14 as shaft
_out If the value obtained by subtracting is negative, the current applied voltage value
V_o The value obtained by subtracting the feedback voltage value ΔV from the
Set as pressure value V.

When the applied voltage value V is set in step S160, the process proceeds to step S161.
The voltage application amount control means 300 controls the voltage converter 220 based on the applied voltage set value to generate a voltage, and the brush 1
A conductive rotor 110 and a housing 120 via
And between them.

Next, the operation timings of the engine as the driving device and the transmission as the driven device as a result of the control performed in the above-described control procedure will be described with reference to FIGS.

As described above, the timing chart shown in FIG. 4 is a case of control not including step S154, and in the present embodiment, four times within the time Δt required for one rotation of the engine which is the predetermined rotation amount. is performed in the measurement, it prompts the minimum rotational speed N _min in between, the time Δ requiring the value of this minimum rotation speed N _min to 1 rotation of the next engine
It is set as the target rotation speed N _in of the transmission input shaft 14 as the driven shaft within t. And
It detects the rotational speed N _out of the transmission input shaft 14, by setting the application voltage value V as the rotation speed becomes the target speed N _in, as shown in FIG. 4, the variation compared to the fluctuation of the engine rotational speed , The rotational speed _Nout of the transmission input shaft 14 is obtained.

The timing chart shown in FIG. 5 is for the control including step S154.
In the measurement at every / 4 rotation, when the rotation speed N _eng of the engine is smaller than the target rotation speed N _in of the transmission input shaft 14 as the driven shaft, even if it is less than the time Δt required for one rotation of the engine (the target rotation speed). The time until the measurement time when the engine speed N _eng smaller than the engine speed is detected is Δt ′), and the smaller engine speed N _eng is set as the target speed N _in of the transmission input shaft 14 as the driven shaft. At the same time, the counter for detecting one revolution of the engine is reset. The engine speed N
_{When eng} is larger than the target rotation speed N _in of the transmission input shaft 14 as the driven shaft, the minimum rotation speed N _min during the time Δt required for one rotation of the engine is obtained as in the case shown in FIG. The value of the minimum number of revolutions N _min is determined by the time Δ required for one revolution of the next engine.
It is set as the target rotation speed N _in of the driven shaft within t.

As described above, when the engine speed N _eng is smaller than the target speed N _in of the transmission input shaft 14 as the driven shaft, the smaller engine speed N _eng is used as the transmission input as the driven shaft. By resetting to the target rotation speed N _in of the shaft 14,
As compared with the case of FIG. 4, the rotation speed N _out of the transmission input shaft 14 as the driven shaft with less fluctuation (there is no rotation speed portion lower than the target rotation speed in FIG. 4) is obtained.

In the above-described embodiment, the transmission has been described as an example of the driven device. However, the present invention is not limited to this. For example, the driven device may be a vehicle accessory such as an air conditioner compressor, a generator, or the like. Good.

Next, another embodiment of the present invention will be described with reference to FIGS.

In this other embodiment, the rotation of the transmission input shaft is controlled using the engine rotation speed sensor on the driving device side and the transmission input shaft rotation speed sensor on the driven device side in the previous embodiment. On the other hand, the feed-forward control of the driven device is performed using only the engine speed sensor on the drive device side.

FIG. 7 is a functional block diagram of another embodiment.
Shown in The same functional portions as those in the previous embodiment are denoted by the same reference numerals. Reference numeral 311 denotes a target rotation speed setting means for obtaining a minimum rotation speed within a predetermined time or within a predetermined rotation amount from among the rotation speeds detected by the engine rotation speed sensor 340, and performing a driven operation based on the obtained minimum rotation speed. It is set as a target rotation speed of an input shaft of a generator (not shown) as a device. 31
5 is the applied voltage value setting means for setting the application voltage value in order to the transmission torque of the clutch required to obtain the target rotational speed N _in set by the target rotational speed setting means 311.

Next, an example of a control procedure of the clutch control device having the above configuration will be described with reference to a flowchart of FIG. The same steps as those in the flowchart shown in FIG. 3 are denoted by the same reference numerals.

When the control is started, first, a signal from the engine speed sensor 340 is input, and a step S1 is executed.
At 51, it is determined whether the engine has rotated 1/4. If it is determined in step S151 that the engine has rotated 1/4, the process proceeds to step S152, and the time required for 1/4 rotation is measured. At the same time, this time is compared with the previous time (time stored during the previous 1/4 rotation), and the larger time (T90) is stored (set) in the register. Then, in step S153, it is determined whether or not the engine has made one rotation, which is a predetermined rotation amount.

If it is determined in step S153 that the engine has made one revolution, the process proceeds to step S156, and the maximum time required for 1/4 revolution recorded in the register (T90)
, A minimum rotation speed N _min (rpm) in one rotation which is a predetermined rotation amount of the engine is obtained. Then, set the minimum rotational speed N _min that this determined as the target rotational speed N _in of the input shaft of the generator is driven axis. Further, step S15
In step 6, the counter for detecting one rotation of the engine is reset.

If it is determined in step S153 that the engine has not made one revolution, step S15
The program proceeds to 5, where 1 is added to the counter for detecting one revolution of the engine (counting up).

After step S156, step S156 is executed.
Proceeding to 170, the applied voltage V required to obtain the target rotation speed N _in of the input shaft of the generator set in step S156 is determined. This required applied voltage V can be obtained as follows.

That is, when the target speed of the input shaft of the generator is N _in , the torque T required to rotate the generator at this speed can be experimentally approximated by the following equation.

[0074]

T = aN _in ² + bN _in + c (1) Further, the transmission torque T of the electrostatic clutch unit 100
Can be experimentally approximated by the following equation when the applied voltage is V.

[0075]

T = dV ₂ (2) From the above equations (1) and (2), an equation for calculating the applied voltage V required to obtain the target rotational speed N _in is obtained as follows.

[0076]

V = ((aN _in ² + bN _in + c) / d) ⁻² where a, b, c and d are constants.

Accordingly, in step S170, the required applied voltage V is obtained by a function operation by substituting the target rotational speed N _in using the above equation.

It is needless to say that the required applied voltage value V may be stored in a predetermined memory as a table _in advance _in correspondence with the target rotational speed N _in and may be obtained by table lookup. No.

[0079] In any event, when it is set as the applied voltage value V corresponding to the target rotation speed N _in step S170, the process proceeds to step S161, the voltage applied amount control means 30
0 controls the voltage converter 220 based on the applied voltage set value to generate a voltage, the clutch conductive rotor 110 and the housing 12 interposed between the engine and the generator.
0 is applied.

Next, still another embodiment of the present invention will be described with reference to FIGS.

This embodiment is different from the previous embodiment in that the driven device is feed-forward controlled using only the engine speed sensor on the driving device side, whereas only the rotation speed sensor of the input shaft on the driven device side is used. Is used to control the driven device.

FIG. 9 shows a functional block of still another embodiment. The same functional portions as those in the previous embodiment are denoted by the same reference numerals. Reference numeral 311 'denotes a target rotation speed setting means, which serves as a driven device, for example, an input shaft rotation speed sensor 330' of a generator.
The minimum rotation speed N _min within a predetermined time or within a predetermined rotation amount is obtained from among the rotation speeds detected by, and based on the obtained minimum rotation speed, the target rotation speed N of the input shaft of the generator as a driven device is determined. set as _in. 315 is the applied voltage value setting means for setting an applied voltage value V so as to transmitted torque value of the clutch required to obtain a set target rotational speed N _in the target rotational speed setting means 311 '. Also, 31
6 compares the rotation speed of the input shaft with the target rotation speed N _in of the input shaft set by the target rotation speed setting means 311 ′, and when the rotation speed of the input shaft is not smaller than the target rotation speed N _in ,
Target rotation speed increasing means for increasing the target rotation speed N _in by a predetermined amount (ΔN) so as to attain a transmission torque value obtained by adding a predetermined amount to the transmission torque value.

Next, an example of a control procedure of the clutch control device having the above configuration will be described with reference to a flowchart of FIG.

When the control starts, step S250
In, a provisional target rotation speed of the driven shaft (for example, a slightly lower rotation speed, for example, 500 rpm in consideration of the idling rotation speed of the engine) is set. Next, a signal from the generator input shaft speed sensor 330 'is input,
In step S251, the input shaft that is the driven shaft is 1 /
It is determined whether four rotations have been made. If it is determined in step S251 that the input shaft has rotated １ ／, step S25
Proceeding to 2, the time required for 1/4 rotation is measured. At the same time, this time is compared with the previous time (time stored during the previous 1/4 rotation), and the larger time (T90) is stored (set) in the register. Then, in step S253, it is determined whether or not the input shaft has made one rotation, which is a predetermined rotation amount, by a counter for detecting one rotation of the input shaft.

If it is determined in step S253 that the input shaft has made one rotation, the flow advances to step S257 to calculate the predetermined rotation amount of the input shaft from the maximum time (T90) required for 1/4 rotation recorded in the register. Is obtained as the minimum rotation speed N _min (rpm) in one rotation. Then, step S2
Proceeding to 58, it is determined whether the flag is on. When the flag is on (as described later, the flag is turned on when the rotational speed N _out of the input shaft in the determination in step S254 is smaller than the driven shaft target speed N _in), step S25
Proceeds to 9, setting the minimum rotation speed N _min that this determined as the target rotational speed N _in of the input shaft of the generator is driven axis. At the same time, the flag is set to off.

By the way, in the judgment at step S258, when the flag is off (as described above, at step S2
Rotational speed N _out of the input shaft in the determination at 54 is the flag is turned ON when smaller than the driven shaft target rotation speed N _in, in other words, the rotational speed of the input shaft N _out is the driven shaft target rotation speed N _in
If not, the flag remains off),
Proceeding to step S260, a predetermined rotation amount ΔN (for example, ΔN = 5) is added to the currently set target rotation speed N _in of the input shaft of the generator, which is the driven shaft, to obtain a new target rotation speed N _in Set. At the same time, the flag is set to off.

Further, from steps S259 and S260, the process proceeds to step S261 to reset the counter for detecting one rotation of the input shaft.

By the way, if the input shaft has not made one rotation in the judgment of the above-mentioned step S253, it is determined in step S254.
To the target rotation speed N _in of the input shaft set as described above and the rotation speed N of the input shaft obtained _in step S252.
_out is compared. Rotational speed N _out of the input shaft is advanced to step S255 when smaller than the driven shaft target rotation speed N _in, and sets the flag to ON, the process proceeds to step S256. Note that the input shaft speed N _out is equal to the driven shaft target speed N
_If it is not smaller than _in , the process proceeds to step S256, so that the flag remains off as described above. Therefore,
In step S256, 1 is added (counted up) to the counter for detecting one rotation of the input shaft.

Next, after step S261 or step S256 described above, the process proceeds to step S262.
An applied voltage V required to obtain the target rotation speed N _in of the input shaft of the generator set in step S259 or step S260 is obtained. This required applied voltage V is, as described in the previous embodiment,

[0090]

V = ((aN _in ² + bN _in + c) / d) It can be obtained by a function calculation by substituting the target rotation speed N _in using the equation of ⁻² . Of course, as described above, the table may be stored in a predetermined memory, and may be obtained by table lookup.

[0091] When configured as the applied voltage value V corresponding to the target rotation speed N _in step S262, step S2
Proceeding to 63, the voltage application amount control means 300 controls the voltage converter 220 based on the applied voltage setting value to generate a voltage, and the clutch conductive rotor 110 interposed between the engine and the generator. And between the housing 120.

Next, the operation timing of the generator as a result of control by the above control procedure will be described with reference to FIG.

The timing chart shown in FIG. 11 shows how the rotation speed of the engine, which is the driving device, varies and how the input shaft of the generator, which is the driven device, rotates, and the input of the generator which is a predetermined amount of rotation. In the present embodiment, four measurements are performed within the time Δt required for one rotation of the shaft. And
The rotation speed N _out of the input shaft is detected, and the minimum rotation speed N during the detection is detected.
_min is obtained, and set the value of this minimum rotation speed N _min as the target rotational speed N _in of the input shaft at the next input shaft in time Δt required for one rotation. Furthermore, compared with the rotational speed N _out the set target rotational speed N _in of the input shaft, when the rotational speed N _out of the input shaft is less than the set target rotational speed N _in (transmitted torque is too large clutch The variation is exerted on the driven side).
_When the value of _min is set as the target rotation speed N _in of the input shaft within the next Δt, and the rotation speed N _out of the input shaft is not smaller than the set target rotation speed N _in (the transmission torque of the clutch is small and the transmission loss within certain means that), in addition to the target rotational speed N _in the currently set a predetermined rotation number .DELTA.N, is set as a new target speed N _in. By setting the applied voltage value V required to achieve either of these target speed N _in, as shown in FIG. 11, the rotational speed N _out of small input shaft fluctuation than the fluctuation of the engine rotational speed is obtained It is.

Further, another example of the control procedure of the clutch control device having the above configuration will be described with reference to the flowchart of FIG. In this control procedure, the minimum rotation speed of the driven shaft when the rotation speed of the driven shaft is smaller than the target rotation speed within one rotation which is the predetermined rotation amount of the driven shaft is set to the target rotation speed in the next one rotation. On the other hand, when the rotation speed of the driven shaft is smaller than the target rotation speed, the minimum rotation speed of the driven shaft is immediately set as the next target rotation speed even in the middle of one rotation. The rotation fluctuation is reduced. The same steps as those in the flowchart of FIG. 10 are denoted by the same reference numerals to facilitate understanding.

When the control starts, first, in step S
At 250, a provisional target rotational speed of the driven shaft (e.g., a slightly lower rotational speed, e.g., 500 rpm, taking into account the idling rotational speed of the engine) is set.

Next, similarly to the procedure of the flowchart of FIG. 10, a signal is input from the generator input shaft rotation speed sensor 330 ', and in step S251, whether or not the input shaft, which is the driven shaft, has made a quarter turn. Is determined. Step S
If it is determined in 251 that the input shaft has turned 1/4 turn, the process proceeds to step S252, and the time required for 1/4 turn is measured. At the same time, this time is compared with the previous time (time stored during the previous 1/4 rotation), and the larger time (T90) is stored (set) in the register. And
Next, in step S253, it is determined whether or not the input shaft has made one rotation, which is a predetermined rotation amount, by a counter for detecting one rotation of the input shaft.

If it is determined in step S253 that the input shaft has not made one rotation, the flow advances to step S254 to set the target rotational speed N _in of the input shaft temporarily set as described above.
Is compared with the input shaft speed N _out obtained in step S252, and in the first routine, the input shaft speed N out
_out proceeds to step S256 since not smaller than the driven shaft target rotation speed N _in, 1 counter for rotation sensing input shaft 1
Add (count up).

If it is determined in step S253 that the input shaft has made one rotation, the flow advances to step S257 to calculate the predetermined rotation amount of the input shaft from the maximum time (T90) required for 1/4 rotation recorded in the register. Is obtained as the minimum rotation speed N _min (rpm) in one rotation. Then, step S2
Proceeding to 60, a predetermined rotation amount ΔN (for example, ΔN = 5) is added to the currently set target rotation speed N _in of the input shaft of the generator, which is the driven shaft, and the new target rotation speed N _in is set. I do. Further, the process proceeds from step S260 to step S261, and the counter for detecting one rotation of the input shaft is reset.

Thus, several control routines are repeated (when the clock frequency of the microcomputer is 20 MHz).
In the case of z, every 0.05 μsec) As a result, the target rotation speed N _in is gradually increased. When the rotation speed N _out of the input shaft is smaller than the target rotation speed N _{in of the} driven shaft in the judgment in step S254 described above, the step Proceeding to S259, the aforementioned minimum rotation speed N
_min is set as the target rotation speed N _in of the input shaft of the generator as the driven shaft, and the process proceeds to step S261. This means that when the rotation speed of the driven shaft becomes smaller than the target rotation speed, the minimum rotation speed of the driven shaft is immediately set as the next target rotation speed even during one rotation.

Next, following step S261 or step S256, steps S262 and S2 are executed.
Since the procedure proceeds to 63, which is the same as the procedure of the previous control, redundant description will be avoided.

Next, the operation timing of the generator as a result of control by the above control procedure will be described with reference to FIG.

The timing chart shown in FIG. 13 shows how the rotation speed of the engine, which is the driving device, varies and how the input shaft of the generator, which is the driven device, rotates. In the present embodiment, four measurements are performed within the time Δt required for one rotation of the shaft. And
The rotation speed N _out of the input shaft is detected, and the minimum rotation speed N during the detection is detected.
_min is determined, but setting the value of this minimum rotation speed N _min as the target rotational speed N _in of the input shaft within the time Δt required for one rotation of the next input shaft, further, the rotational speed N _out of the input shaft compared set the target rotation speed N _in, that is smaller than the rotational speed N _out the set target rotational speed N _in of the input shaft (transmission torque is too large variation in the clutch is exerted on the driven side Means) the minimum rotational speed N _min
Value is set as the target rotational speed N _in the 1 middle of rotation (Delta] t ') even input shaft is immediately driven shaft, when the rotational speed N _out of the input shaft is not smaller than the set target rotational speed N _in ( (Meaning that the transmission torque of the clutch is small and that there is a transmission loss) includes the currently set target rotation speed N _in
To the new target rotation speed N _in
Set as By setting the applied voltage value V necessary to obtain any one of the target rotational speeds N _in , as shown in FIG. 13, the input shaft having a smaller variation than that of FIG. The rotation speed N _out is obtained.

Of the clutch control devices described above, the clutch control device related to the running of the vehicle is:
Further, when the vehicle speed exceeds a predetermined low speed (for example, 20 km) based on the detection from the vehicle speed sensor 320 as a vehicle speed detecting means for detecting the vehicle speed, the applied voltage is set so that the clutch reaches the maximum transmission torque value. The above control may be performed when the vehicle speed is equal to or lower than a predetermined low speed. This is because when the vehicle speed exceeds a predetermined speed, the problem of vibration is not so large depending on the rotation speed fluctuation in a transmission or the like to which the engine rotation speed fluctuation is transmitted as it is, and becomes a problem at a low speed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an electrostatic clutch device used in the present invention.

FIG. 2 is a functional block diagram of a control system according to the embodiment of the present invention.

FIG. 3 is a flowchart illustrating an example of a control procedure according to an embodiment of the present invention.

FIG. 4 is a timing chart showing operation timings as a result of one control of one embodiment of the present invention.

FIG. 5 is a timing chart showing operation timings as a result of another control according to the embodiment of the present invention;

FIG. 6 is a graph showing a relationship between a rotation speed difference and an applied voltage.

FIG. 7 is a functional block diagram of a control system according to another embodiment of the present invention.

FIG. 8 is a flowchart illustrating an example of a control procedure according to another embodiment of the present invention.

FIG. 9 is a functional block diagram of a control system according to still another embodiment of the present invention.

FIG. 10 is a flowchart illustrating an example of a control procedure according to still another embodiment of the present invention.

FIG. 11 is a timing chart showing operation timings as a result of one control according to still another embodiment of the present invention.

FIG. 12 is a flowchart illustrating another example of a control procedure according to still another embodiment of the present invention.

FIG. 13 is a timing chart showing operation timing as a result of another control according to still another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 electrostatic clutch unit 110 rotor (second rotating member) 113 electrostatic member (fiber or fiber aggregate) 120 housing (first rotating member) 123 electrostatic member (fiber or fiber aggregate) 200 voltage applying means 220 voltage converter 300 voltage application amount control means 310 electronic control unit (ECU) 320 vehicle speed sensor 330 transmission input shaft sensor 340 engine speed sensor

Claims (8)

[Claims] 1. A control device for a clutch provided between a drive shaft of a drive device and an input shaft of a driven device, comprising: a drive shaft rotation speed detecting means for detecting a rotation speed of the drive shaft of the drive device; A driven shaft rotation speed detecting means for detecting a rotation speed of an input shaft of the driven device; and a rotation speed detected by the drive shaft rotation speed detecting device, wherein a minimum rotation speed within a predetermined time or within a predetermined rotation speed is determined. A target rotation speed setting means for obtaining and setting a target rotation speed of the input shaft of the driven device based on the obtained minimum rotation speed; a target rotation speed set by the target rotation speed setting means and the driven shaft rotation speed; A control device for a clutch, comprising: a control unit that obtains a difference from the rotation speed of the input shaft detected by the detection unit, and controls a transmission torque value of the clutch so as to reduce the difference. 2. The target rotation speed setting unit further compares the rotation speed detected by the drive shaft rotation speed detection unit with a set target rotation speed, and determines that the rotation speed is the set target rotation speed. The clutch control device according to claim 1, further comprising a target rotation speed update setting unit that sets the rotation speed as a new target rotation speed when the rotation speed is smaller than the rotation speed. 3. The clutch according to claim 1, wherein the clutch is a first rotating member that rotates integrally with a driving shaft of a driving device, and has at least one facing surface provided with a fiber or a fiber assembly on a surface at a predetermined position. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the second rotating member faces at least one facing surface of the first rotating member with a predetermined gap therebetween. A second rotating member having at least one facing surface provided with a fiber or a fiber assembly; and a voltage applying means for applying a voltage between the first rotating member and the second rotating member. The control device for a clutch according to claim 1 or 2, further comprising: 4. A control device for a clutch provided between a drive shaft of a driving device and an input shaft of a driven device, comprising: a driving shaft rotation speed detecting means for detecting a rotation speed of the driving shaft of the driving device; Calculating a minimum rotation speed within a predetermined time or within a predetermined rotation amount among the rotation speeds detected by the drive shaft rotation speed detection means, and determining a target rotation speed of the input shaft of the driven device based on the determined minimum rotation speed; And a control means for controlling the clutch so as to have a transmission torque value corresponding to the target rotation speed set by the target rotation speed setting means. Control device. 5. The clutch according to claim 1, wherein the clutch is a first rotating member that rotates integrally with a driving shaft of a driving device, and has at least one opposing surface provided with a fiber or a fiber assembly on a surface at a predetermined position. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the second rotating member faces at least one facing surface of the first rotating member with a predetermined gap therebetween. A second rotating member having at least one facing surface provided with a fiber or a fiber assembly; and a voltage applying means for applying a voltage between the first rotating member and the second rotating member. And an application voltage setting unit configured to set an applied voltage corresponding to a target rotation speed set by the target rotation speed setting unit; and the control unit controls the voltage application unit to the set application voltage. Control means; The clutch control device according to claim 4, wherein the door. 6. A clutch control device provided between a drive shaft of a drive device and an input shaft of a driven device, comprising: a driven shaft rotation speed detecting means for detecting a rotation speed of an input shaft of the driven device; Calculating a minimum rotation speed within a predetermined time or within a predetermined rotation amount among rotation speeds detected by the driven shaft rotation speed detection means, and calculating the obtained minimum rotation speed as a target rotation speed of the input shaft of the driven device; Target speed setting means, and control means for controlling the clutch to have a transmission torque value corresponding to the target speed set by the target speed setting means. Comparing the rotation speed of the input shaft detected by the driven shaft rotation speed detection means with the target rotation speed of the input shaft set by the target rotation speed setting means, and determining that the rotation speed of the input shaft is the target rotation speed. Smaller When, the clutch control apparatus and controls the clutch so that a predetermined amount added was transmitted torque value to the transmission torque value. 7. The clutch according to claim 1, wherein the clutch is a first rotating member that rotates integrally with a driving shaft of a driving device, and has, at a predetermined position, at least one facing surface having a fiber or a fiber aggregate provided on a surface thereof. A first rotating member, and a second rotating member that rotates integrally with the input shaft of the driven device, wherein the second rotating member faces at least one facing surface of the first rotating member with a predetermined gap therebetween. A second rotating member having at least one facing surface provided with a fiber or a fiber assembly; and a voltage applying means for applying a voltage between the first rotating member and the second rotating member. And an application voltage setting unit configured to set an applied voltage corresponding to a target rotation speed set by the target rotation speed setting unit; and the control unit controls the voltage application unit to the set application voltage. And control means. The clutch control device according to claim 6, wherein the door. 8. A control device for the clutch further comprising: vehicle speed detecting means for detecting a vehicle speed; and transmitting the clutch to a maximum when the vehicle speed exceeds a predetermined low speed based on the vehicle speed detected by the vehicle speed detecting means. Switching means for controlling to a torque value and switching to activate the control means according to any one of claims 1 to 7 when the vehicle speed is equal to or lower than a predetermined low speed. The control device for a clutch according to any one of the above.