JP3463230B2 - Active mount drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive of an active mount that supports a vibrating body such as an engine for a vehicle such as an automobile, imparts a vibration having a phase opposite to that of the vibrating body and attenuates the vibration. Regarding the device.

[0002]

2. Description of the Related Art As a device for fixing a vibration body such as an automobile engine to a chassis and further damping the vibration, there is, for example, an active mount disclosed in Japanese Patent Laid-Open No. 3-24338.

The structure and operation of this active mount will be described with reference to FIG. In the active mount 300 shown in FIG. 6, the chassis of a vehicle is a support 30.
1, the support 301 is provided with an expansion spring 302 made of an elastic rubber material and formed in a hollow conical shape. The engine is also coupled to the outer shell (housing) 303. The outer shell 303 houses a lifting magnet 304 that acts vertically downward. The lifting magnet 304 includes a permanent magnet 305 and an electromagnet 306.
Is a cylindrical iron core and two coils 3 housed in this iron core
06a, 306b, soft iron bearing 307
Fixed in a groove surrounding the permanent magnet 305. The support 301, the expansion spring 302, and the outer shell 303 are inseparably connected.

Further, the outer shell 303 is provided with a leaf spring 308 having an annular shape, the inner periphery of which is the leaf 30.
The plate 309 is supported behind the permanent magnet 305 and the electromagnet 306. The plate 309 and the plate spring 308
Are watertightly coupled, and the elasticity of the leaf spring 308 is due to the electromagnet 306.
Is adjusted by the holding force of the permanent magnet 305 so that the relative movement of the plate 309 with respect to the plate spring 308 is prevented during the operation of. An area surrounded by the plate 309, the outer shell 303, the expansion spring 302, and the support body 301 is the working chamber 40, which is filled with the hydraulic working liquid. Working chamber 310
Is connected to the pressure adjusting chamber 312 via the buffer hole 311. The pressure regulation chamber 312 is closed on the outside by a bellows 313, and the flexibility of the bellows 313 accommodates the auxiliary working liquid so as not to apply pressure. Due to the pressure adjusting chamber 312, the pressure in the working chamber 310 does not increase with respect to the initial load during use.

The active mount 30 having such a configuration
At 0, when vibration is transmitted, reciprocal relative displacement of the support 301 with respect to the outer shell 303 occurs. The plate 309 that directly faces the support 301 and the expansion spring 302 and is reciprocally moved by the lifting magnet 304 has a relatively large area F. Therefore, the plate 309 is excluded by the support 301 and the expansion spring 302 during the relative displacement. The amount of liquid dispensed can be compensated for with a relatively small movement of the plate 309.

Therefore, a drive circuit (not shown) supplies a drive current to the electromagnet 306, and the electromagnet 306 and the permanent magnet 3 are connected.
The plate 309 is slightly vibrated by cooperating with 05. As a result, if the hydraulic pressure in the working chamber 310 is changed and the liquid in the working chamber 310 is vibrated in a phase opposite to the vibration of the engine, the vibration of the engine can be damped. In that case, the vibration of the engine is detected, a control signal is created by the control circuit, and the transmission delay of each signal processing of applying a drive current to the electromagnet is fully considered, and the phase of each signal based on the transmission delay is taken into consideration. It is necessary to appropriately compensate for the deviation and control the drive current supplied to the electromagnet 306.

[0007]

As the drive circuit, for example, a drive circuit 4 used for an electric motor such as a motor (M) as shown in FIG. 7A or 7B.
00, 500, etc. are applied. Drive circuit 4 of FIG. 7 (a)
00 is the switching element 40 connected to the power supply 401.
2 is turned on / off by a control signal CNT400 to supply a current to the motor (M). In addition, FIG.
The drive circuit 500 of (a) has control signals CTL501 to CT.
The switching elements 501 and 504 and the switching elements 502 and 503 are simultaneously and complementarily turned on and off by L504 to control the direction of current flow and supply the current to the motor (M).

That is, generally, the active mount 3
As a drive circuit of 00, a method of switching each switching element on and off and controlling the current value by the duty ratio of the on and off, a so-called PW
A circuit using the M method is known.

The vibration frequency range of the active mount 300 is as wide as 20 Hz to 200 Hz, and the vibration frequency range is 20H.
In the low frequency range of z to 50 Hz, the vibration to be damped (engine vibration in the idling range) is large, and the amplitude of the active mount is also required to be larger. Therefore, considering the large amplitude in the low frequency region, the power consumption in the low frequency region can be suppressed by increasing the number of coil turns. This is because the magnetic flux density generated by the coil is proportional to the product of the current and the number of turns.

However, by increasing the number of turns of the coil, the inductance component of the coil increases, the current flowing through the coil in the high frequency region decreases, and the amplitude of the active mount decreases. Therefore, a sufficient amount of attenuation cannot be obtained in the high frequency region. Therefore, the drive circuit (PW
When the active mount is driven using M method,
If the number of turns of the coil is small, the power consumption in the low frequency region increases, and if the number of turns of the coil is large, the amount of attenuation in the high frequency region becomes insufficient.

The present invention has been made in view of the above circumstances, and an object thereof is to suppress the current flowing through the coil of the active mount in the low frequency region and realize the power saving. Another object of the present invention is to provide an active mount drive device capable of passing a sufficient current through a coil in a high frequency range and obtaining a sufficient amount of attenuation.

[0012]

In order to achieve the above object, the present invention generates vibration by cooperation of an electromagnet composed of two coils to which electric current is supplied and a permanent magnet, and vibrates a vibrating body. Is a drive device for driving an active mount for attenuating the two coils, wherein first switching means for supplying a sinusoidal current to the two coils, and serial connection and parallel connection of the two coils based on a control signal. Second switching means for switching, vibration detection means for detecting vibration of the vibrating body, frequency of current flowing through the coil based on a detection signal of the vibration detection means, and the control signal according to the determination the and a control means for outputting to said second switching means, said first Sui
The switching means is connected to the power source in response to the input of the second control signal.
At least one switch operatively connecting to the coil.
A switching transistor, and the two coil
The current that detects the current value flowing in the
Value detection means and the switch based on the current value signal.
Determine the on / off duty ratio of the transistor
The second control signal according to the determination.
And a control means for outputting to the switching means .

Further, according to the present invention, an active mount for attenuating the vibration of a vibrating body supported by a support body is generated by the cooperation of an electromagnet composed of two coils to which a current is supplied and a permanent magnet. And a first switching means for supplying a sinusoidal current to the two coils, and a second switching means for switching between the series connection and the parallel connection of the two coils based on a control signal. Means, a first vibration detecting means for detecting the vibration of the vibrating body, a second vibration detecting means for detecting the vibration of the supporting body, and a detection signal of the first and second vibration detecting means. The amplitude and frequency of the current flowing through the coil,
The phase is determined, and the control signal corresponding to the determination is transmitted to the second
A control means for outputting a switching means, the front
Note that the first switching means inputs the second control signal.
Accordingly, at least the power supply and the coil are operatively connected.
Also has one switching transistor, and
The current value flowing in the two coils is detected and the current value signal is output.
Based on the current value detection means to generate the current value signal
Turn on / off the switching transistor.
A second control signal for determining a duty ratio and responsive to the determination
To the first switching means .

Further, when the determined frequency is in the first frequency band, the control means of the active mount drive device of the present invention outputs the control signal so as to connect the two coils in series. When the output and determined frequency is in the second frequency band higher than the first frequency range, the control signal is output so as to connect the two coils in parallel.

[0015]

According to the active mount drive device of the present invention, the vibration of the vibrating body is detected by the vibration detecting means, and
The vibration of the support provided through the active mount is detected by the second vibration detecting means, and these detection signals are input to the control means. In the control means, the frequency or amplitude of the current flowing in the coil based on the detection signal,
The frequency and phase are determined, and the control signal corresponding to the determination is sent to the second
Is output to the switching means. The control signal has, for example, the determined frequency in the first frequency band (low frequency band).
If it is, the two coils are output so as to be connected in series. On the other hand, when the determined frequency is in the second frequency band higher than the first frequency band, the two coils are output so as to be connected in parallel.
As a result, in the low frequency region, the current flowing through the coil of the active mount can be suppressed, and in the high frequency region, a sufficient current can flow through the coil.

[0017]

1 is a block diagram showing an embodiment of an active mount drive device according to the present invention. FIG. 1 is a diagram showing a state in which an engine 201 is installed on a chassis 202 of an automobile via an active mount 300 and the active mount 300 is controlled by a drive device 100 of the present invention. The active mount 30
The configuration of 0 is the same as that of the active mount shown in FIG. 6 described above.

The active mount drive device 100 includes a rotation sensor 101, a G sensor 102, and a current value detector 10.
3, control circuit 104, switching element drive circuit 105, n-channel MOSFETs 106 to 109 constituting the first switching means, n-channel MOSFETs 110 to 11 constituting the second switching means
5, diodes 116 to 121, and resistance element 122
It is composed by.

Further, the active mount drive device 1
00, under the control of the control circuit 104, the operation of mode 1 in which the current supply direction is the forward rotation direction and the operation of mode 2 in which the current supply direction is the reverse rotation direction are repeatedly performed in the low frequency region (about 20 to 50 Hz), High frequency range (50-2
At about 00 Hz), the operation of mode 3 in which the current supply direction is the forward rotation direction and the operation of mode 4 in which the current supply direction is the reverse rotation direction are repeated. In this embodiment, the forward rotation direction is
In the coils 306a and 306b, the electric current flows from the terminal T1 to T
2, T3 → T4, and the direction of reverse rotation means that the current flows through the terminals T2 → T in the coils 306a and 306b.
1, when T4 → T3.

The rotation sensor 101 is a sensor provided in the engine 201 in order to detect the rotation state of the engine 201. The rotation sensor 101 detects the number of rotations of the engine 201 and the phase of the rotation and rotates the detected rotation state. Number signal S1
It is output to the control circuit 104 as 01. If the engine 201 is, for example, an ordinary automobile engine, the rotation speed has a value of about 600 rpm to 6000 rpm. The phase can be detected by issuing a predetermined detection signal when the rotation of the engine 201 reaches a predetermined position. The predetermined position may be, for example, a center position of vibration or a peak position such as a highest position and a lowest position. The rotation sensor 101 can be configured by a normal position sensor or the like.

The G sensor 102 is provided on the chassis 202, and has an engine 201 and an active mount 300.
This is a sensor for detecting the vibration of the chassis 202 due to.
In other words, the G sensor 102 is the active mount 3
The degree of cancellation of the vibration of the engine 201 at 00 is detected, and the detected vibration state is output to the control circuit 104 as a signal S102. The G sensor 102 is composed of, for example, an acceleration sensor.

The current value detector 103 is composed of two coils 3 connected in series or in parallel with the active mount 300.
The value of the current flowing through 06a and 306b is detected as the value of the current flowing through the resistance element 122, and the current value signal S103 is output to the control circuit 104.

The control circuit 104 includes a current value signal S103 from the current value detector 103, a rotation speed signal S101 from the rotation sensor 101, and an acceleration sensor output signal S.
The amplitude, frequency and phase of the current flowing through the coil are determined from 102, and the series connection control signals S104, S according to the determination.
105 and parallel connection control signals S106 to S109 and PWM signals S110 to S113 are generated and output to the switching element drive circuit 105.

Specifically, for example, the rotation sensor 101
When the rotation speed of the engine 201 indicated by the rotation speed signal S101 is less than 1500 rpm, the low frequency region (50H
z or less), and the series connection control signal S10 so as to repeatedly perform the operation of mode 1 (low frequency region, forward rotation direction) and mode 2 (low frequency region, reverse rotation direction).
4, S105 and parallel connection control signals S106 to S10
9 and PWM signals S110 to S113 are generated. More specifically, mode 1 (low frequency range, forward rotation direction)
In the case of, in the serial connection control signals S104 and S105, S104 is output at a low level and S105 is output at a high level, and the parallel connection control signals S106 to S109 are output at a low level, among the PWM signals S110 to S113. S110, S113 are low level, S111, S112
Is output at a high level. In the case of mode 2 (low frequency region, reverse rotation direction), the serial connection control signal S10
4, out of S105, S104 is high level, S105
Is output at a low level, and parallel connection control signals S106 to S
All 109 outputs at a low level, and the PWM signal S110
Of S113 to S110, S113 to high level, S
111 and S112 are output at a low level.

Further, the control circuit 104 is provided for the engine 2 indicated by the rotation speed signal S101 from the rotation sensor 101.
01 rotation speed is 1500 rpm or more (up to 6000 rp
In the case of m), it is determined that it is in the high frequency region (50 Hz to 200 Hz), and the operation of mode 3 (high frequency region, forward rotation direction) and mode 4 (high frequency region, reverse rotation direction) are repeated so that series operation is performed. Connection control signals S104, S105
And parallel connection control signals S106 to S109 and PW
The M signals S110 to S113 are generated. More specifically, in the case of mode 3 (high frequency region, normal rotation direction),
The serial connection control signals S104 and S105 are output at a low level, and among the parallel connection control signals S106 to S109, S
116 and S119 are output at a low level, S117 and 118 are output at a high level, and S110 and S113 of the PWM signals S110 to S113 are output at a low level and S111 and S11 are output.
2 is output at high level. In the case of mode 4 (high frequency region, reverse rotation direction), the serial connection control signal S10
4, S105 is output at a low level, and among the parallel connection control signals S106 to S109, S116 and S119 are output at a high level and S117 and 118 are output at a low level.
Of the M signals S110 to S113, S110 and S113 are output at a high level and S111 and S112 are output at a low level.

Further, the control circuit 104, based on the current value signal S103 from the current value detector 103,
The MOSFETs 106 to 109 are turned on (ON) and turned off (O).
FF) duty ratio is determined, and PWM signals S110 to S113 having a pulse width according to the determination are output. Switching between mode 1 and mode 2, and mode 3 and mode 4 is performed based on the rotation speed signal S101. For example, when the rotation speed signal S101 is on the positive (+) side, modes 1 and 4, and when it is on the negative (-) side, modes 2 and 4.
Control as 3.

The switching element drive circuit 105 has a serial connection control signal S output from the control circuit 104.
104, S105, parallel connection control signals S106 to S10
9 and the PWM signals S110 to S113, and the corresponding signals S114 to S114 with the same level as the input level.
The data is output to the gate electrodes of the MOSFETs 106 to 115 as S222. Specifically, the serial connection control signal S104
The signal S104 is output to the gate electrode of the MOSFET 115 in response to, and the signal S105 is output to the gate electrode of the MOSFET 114 in response to the series connection control signal S105. In addition, the signal S corresponding to the parallel connection control signal S106
116 is output to the gate electrode of the MOSFET 111, and the signal S117 is changed to MO in response to the parallel connection control signal S107.
The signal S118 is output to the gate electrode of the SFET110, and the signal S118 is output in response to the parallel connection control signal S108.
3 and outputs the signal S119 to the gate electrode of the MOSFET 112 in response to the parallel connection control signal S109. Further, the signal S120 is output to the gate electrode of the MOSFET 106 in response to the PWM signal S110, and the signal S121 is changed to MO in response to the PWM signal S111.
Output to the gate electrode of SFET107, and PWM signal S1
The signal S123 is output to the gate electrode of the MOSFET 109 corresponding to 12, and the signal S122 is output to the gate electrode of the MOSFET 108 corresponding to the PWM signal S113.

The MOSFETs 106 to 115,
Diodes 116 to 121 and coils 306a, 30
Attached to the connection relationship of 6b will be described. MOSFET 106
And 108 and MOSFETs 107 and 109 are respectively connected in series, and these MOSFETs 10 are connected in series.
6, 108 and MOSFETs 107, 109 have a power supply voltage V
_It is connected in parallel between the _CC supply line and one end of the resistance element 122, and the other end of the resistance element 122 is grounded. The terminal T1 of the coil 306a has MOSFETs 107 and 109.
Connection point N101, drain of MOSFET 110,
Each of them is connected to the cathode of the diode 117. The terminal T2 of the coil 306a is the diode 118, 1
21 and the drains of the MOSFETs 113 and 114, respectively. The terminal T3 of the coil 306b is connected to the cathodes of the diodes 116 and 120 and the drains of the MOSFETs 111 and 115, respectively. The terminal T4 of the coil 306b is MOSF
Connection point N100 between ETs 106 and 108, MOSFET
It is connected to the drain of 112 and the cathode of the diode 119, respectively. Source of MOSFET 110, anode of diode 116, MOSFET 111
Source and diode 117 anode, MOSFET
112 drain and diode 118 anode, MO
The source of the SFET 113 is connected to the anode of the diode 119, the source of the MOSFET 114 is connected to the anode of the diode 120, and the source of the MOSFET 115 is connected to the anode of the diode 121.

Next, the operation of the above configuration will be described with reference to FIGS.
Will be described with reference to. Active mount drive device 1
In 00, the rotation of the engine 201 is detected by the rotation sensor 101 provided in the engine 201, the rotation speed signal S101 is output, and the engine 201
The vibration of the chassis 202 provided through the active mount 300 is detected by the G sensor 102 provided in the chassis 202, and the detection signal S10
2 is output. Then, the rotation speed signal S101 and the detection signal S102 are input to the control circuit 104. Further, in the current value detection unit 103, the two coils 3 connected in series or in parallel with the active mount 300 are connected.
The value of the current flowing through 06a and 306b is detected and output as a current value signal S103 to the control circuit 104.

In the control circuit 104, the amplitude, frequency and phase of the current flowing through the coil are determined based on the rotation speed signal S101 and the acceleration sensor output signal S102 from the rotation sensor 101 and the current value signal S103 from the current value detector 103. The serial connection control signals S104 and S105, the parallel connection control signals S106 to S109, and the PWM signals S110 to S11, the levels of which are set accordingly.
3 is output to the switching element drive circuit 105.

Here, for example, when the rotation speed of the engine 201 indicated by the rotation speed signal S101 from the rotation sensor 101 is 1500 rpm or less, it is determined to be in the low frequency region (50 Hz or less), and the operation of mode 1 and mode 2 is performed. Control is performed so as to be repeated.

In mode 1, the serial connection control signal S10
4 is low level, S105 is high level, parallel connection control signals S106 to S109 are all low level, PWM signals S110 and S113 are low level, S111 and S112 are high level, and switching element drive From the circuit 105, signals S114 to S123 having a level according to the input signal level are output from the MOSF.
It is supplied to the gate electrodes of ETs 106 to 115. As a result, as shown in FIG.
MOSFETs 10 and 8 are held in the ON state.
6, 109, 111 to 113, 115 are held in the off state. In this case, the coils 114a and 306b are connected in series by the MOSFET 114 and the diode 120, and the normal direction of the coils, that is, the coils 306a, 3b, is controlled by the PWM control based on the current value signal S103.
At 06b, a current flows in the direction of terminals T1 → T2, T3 → T4 in the form of a sine wave.

In mode 2, the serial connection control signal S10
4 is output at a high level, S105 is output at a low level, parallel connection control signals S106 to S109 are output at a low level, PWM signals S110 and S113 are output at a high level, and S111 and S112 are output at a low level to drive switching elements. From the circuit 105, signals S114 to S123 having a level according to the input signal level are output from the MOSF.
It is supplied to the gate electrodes of ETs 106 to 115. As a result, as shown in FIG.
9, 115 are held in the ON state, and the MOSFET 10
7, 108, 111 to 114 are held in the off state.
In this case, the MOSFET 115 and the diode 121
The coils 306a and 306b are connected in series with each other by the PWM control based on the current value signal S103, and the current is a sinusoidal current in the reverse direction of the coils, that is, in the coils 306a and 306b in the direction of terminals T2 → T1, T4 → T3. Flows.

In the control circuit 104,
The rotation speed of the engine 201 indicated by the rotation speed signal S101 from the rotation sensor 101 is 1500 rpm or more (up to 6000 rpm).
rpm), high frequency range (50Hz-200H
z), and control is performed so that the operations of mode 3 and mode 4 are repeated.

In the case of mode 3, the serial connection control signal S10
4, S105 is output at a low level, parallel connection control signals S106, S109 are at a low level, S117, 118
Is output at a high level, and the PWM signals S110 and S11 are output.
3 is output at a low level, and S111 and S112 are output at a high level. As a result, as shown in FIG.
T107, 108, 110, 113 are held in the ON state, and MOSFETs 106, 109, 111, 112, 1
14, 115 are held in the off state. And MOS
FET 110, diode 116, MOSFET 11
3, the coil 306a, 306b by the diode 119
Are connected in parallel and PWM based on the current value signal S103
By control, the forward rotation direction of the coil, that is, the coil 3
At 06a and 306b, the current is changed from the terminal T1 to T2 and T3.
→ A sinusoidal current flows in the direction of T4.

In mode 4, the serial connection control signal S10
4, S105 is output at a low level, parallel connection control signals S106 and S109 are at a high level, and S117 and 118 are output.
Is output at a low level, and the PWM signals S110 and S11 are output.
3 is output at a high level, and S111 and S112 are output at a low level. As a result, as shown in FIG.
T106, 109, 111, 112 are held in the ON state, and MOSFETs 107, 108, 110, 113, 1
14, 115 are held in the off state. And MOS
FET111, diode 117, MOSFET11
2. Coil 306a, 306b by diode 118
Are connected in parallel and PWM based on the current value signal S103
By the control, the reverse direction of the coil, that is, the coil 3
At 06a and 306b, the current flows from the terminal T2 to T1 and T4.
→ A sinusoidal current flows in the direction of T3.

As described above, by switching the modes 1 and 2 in the low frequency region and by switching the modes 3 and 4 in the high frequency region, a sinusoidal current is supplied to the coil in the entire region. The active mount 300 can be vibrated with an amplitude according to each frequency.

As described above, in the active mount drive device 100 of this embodiment, the rotation speed signal S
Based on the frequency information obtained from 101, the coils 306a and 306b are connected in series in the low frequency region, and the coils 306a and 306b are connected in parallel in the high frequency region. Since the coils are made to flow in the reverse direction, the two coils can be used in series in the low frequency region, so that the current flowing through the coils can be suppressed and the power consumption can be saved. Further, since two coils can be used in parallel in the high frequency region, a sufficient current can be passed through the coils and a sufficient amount of attenuation can be obtained.

The present invention is not limited to this embodiment, and various modifications can be made. For example, the G sensor 12 is an acceleration sensor in the present embodiment, but the G sensor 12 is not limited to this, and a pressure sensor can also provide an equivalent function. In addition, the G sensor 12
The specific sensor type may be any sensor regardless of whether it is an acceleration sensor or a pressure sensor.

[0040]

As described above, according to the active mount drive device of the first aspect, a sinusoidal current can be passed through the coil in the entire frequency range, without being affected by the number of turns of the coil. The active mount can be vibrated with an amplitude corresponding to each frequency.

According to a second aspect, in addition to the detection result of the detecting means for detecting the vibration of the vibrating body, the detection result of the detecting means for detecting the vibration of the supporting body is used. In addition to the above effect, there is an advantage that more precise control can be realized.

According to the third aspect, since the two coils can be used in series in the low frequency region, the current flowing through the coils can be suppressed and the power consumption can be saved. Further, since two coils can be used in parallel in the high frequency region, a sufficient current can be passed through the coils and a sufficient amount of attenuation can be obtained.

Further, according to the fourth aspect, the current value control can be performed with high accuracy based on the current value signal.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an active mount drive device according to the present invention.

FIG. 2 is a diagram for explaining an operation in mode 1 of the active mount drive device according to the present invention.

FIG. 3 is a diagram for explaining the operation of the active mount drive device according to the present invention in mode 2.

FIG. 4 is a diagram for explaining the operation of the active mount drive device according to the present invention in mode 3;

FIG. 5 is a diagram for explaining the operation of the active mount drive device according to the present invention in mode 4.

FIG. 6 is a diagram showing a configuration of an example of an active mount.

FIG. 7 is a diagram showing a general drive circuit of an active mount.

[Explanation of symbols]

100 ... Drive device 101 ... Rotation sensor 102 ... G sensor 103 ... Current value detection unit 104 ... Control circuit 105 ... Switching element drive circuit 106-115 ...
MOSFETs 116 to 121 ... Diode 122 ... Resistance element 201 ... Engine 202 ... Chassis 30 ... Active mount 301 ... Support 302 ... Expansion spring 303 ... Outer shell 304 ... Magnet 305 ... Permanent magnet 306 ... Electromagnets 306a, 306b ... Coil 307 ... Support 308 ... Leaf spring 309 ... Plate 310 ... Working chamber 311 ... Buffer hole 312 ... Pressure adjusting chamber 313 ... Bellows

Claims (3)

(57) [Claims] 1. Two coils (306) supplied with current
a drive device (100) for driving an active mount (300) for damping vibration of a vibrating body (201) by generating vibration by cooperation of an electromagnet and a permanent magnet, which are configured by a. A first switching means (106, 1) for supplying a sinusoidal current to the two coils (306a, 306b).
07, 108, 109) and a second switching means (110, 1) for switching between serial connection and parallel connection of the two coils based on a control signal.
11, 112, 113, 114, 115), a vibration detecting means (101) for detecting the vibration of the vibrating body (201), and a current flowing through the coil based on a detection signal of the vibration detecting means (101). Control means (104, 105) for determining a frequency and outputting the control signal according to the determination to the second switching means , wherein the first switching means controls the second control signal input
Depending on the
Both have one switching transistor, and detect the value of the current flowing through the two coils to obtain a current value signal.
And a current value detecting means (103) for generating the current value and the switching transistor based on the current value signal.
Determine the on / off duty ratio of the transistor and respond to the determination.
The second control signal generated by the first switching means.
And an active mount drive device having control means (104, 105) for outputting to . 2. Two coils (306) supplied with current.
a drive for driving an active mount (300) that generates vibration by the cooperation of an electromagnet composed of a and 306b) and a permanent magnet, and attenuates the vibration of the vibrator (201) supported by the support (202). An apparatus (100) comprising first switching means (106, 1) for applying a sinusoidal current through the two coils (306a, 306b).
07, 108, 109) and a second switching means (110, 1) for switching between serial connection and parallel connection of the two coils based on a control signal.
11, 112, 113, 114, 115), first vibration detecting means (101) for detecting the vibration of the vibrating body (201), and second vibration detecting for detecting the vibration of the support body (202). Means (102) and the first and second vibration detection means (101, 102)
The control means (10) for determining the amplitude, frequency, and phase of the current flowing through the coil based on the detection signal of (1) and outputting the control signal corresponding to the determination to the second switching means.
And 4,105), having a first switching means, the input of the second control signal
Depending on the
Both have one switching transistor, and detect the value of the current flowing through the two coils to obtain a current value signal.
And a current value detecting means (103) for generating the current value and the switching transistor based on the current value signal.
Determine the on / off duty ratio of the transistor and respond to the determination.
The second control signal generated by the first switching means.
And an active mount drive device having control means (104, 105) for outputting to . 3. The control means sets the determined frequency to the first
In the second frequency range, the control signal is output so that the two coils are connected in series, and the determined frequency is higher than the first frequency range. In this case, the active mount drive device according to claim 1 or 2, wherein the control signal is output so as to connect the two coils in parallel.