Current drive of tripolar magneto-rheological damper

A magnetorheological damper, current driver technology, applied in the direction of converting DC power input to DC power output, instruments, shock absorbers, etc., can solve the problems of voltage and current fluctuations of bipolar current drivers, and achieve faster current response. Speed, the effect of reducing the impact of the current

Pending Publication Date: 2021-04-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, there is a problem in the prior art that the bipolar current driver causes large fluctuations in voltage and current

Method used

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  • Current drive of tripolar magneto-rheological damper
  • Current drive of tripolar magneto-rheological damper
  • Current drive of tripolar magneto-rheological damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] see Figure 1 to Figure 7 A current driver for a tripolar magneto-rheological damper comprises a current feedback circuit, a control circuit, a MOS tube drive circuit, a full bridge circuit and a current feedback circuit.

[0045] The current feedback circuit monitors the current in the magnetorheological damper coil, and sends the monitored current to the control circuit.

[0046] The current feedback circuit is a Hall-type current sensor connected in series with the magneto-rheological damper coil.

[0047] The control circuit receives the external expected current I(k) and the monitoring current i(k) sent by the current feedback circuit, and determines the duty cycle of the two PWM signals according to the expected current I(k) and the monitoring current i(k) .

[0048] The method for the control circuit to determine the duty cycle of the two PWM signals is: the control circuit calculates the generalized duty cycle Duty(k) according to the PID control algorithm. g...

Embodiment 2

[0076] see Figure 1 to Figure 7 A current driver for a tripolar magneto-rheological damper comprises a current feedback circuit, a control circuit, a MOS tube drive circuit, a full bridge circuit and a current feedback circuit.

[0077] The current feedback circuit monitors the current in the magnetorheological damper coil, and sends the monitored current to the control circuit.

[0078] The current feedback circuit is a sampling resistor connected in series with the magnetorheological damper coil.

[0079] The control circuit receives the external expected current I(k) and the monitoring current i(k) sent by the current feedback circuit, and determines the duty cycle of the two PWM signals according to the expected current I(k) and the monitoring current i(k) .

[0080] The method for the control circuit to determine the duty cycle of the two PWM signals is: the control circuit calculates the generalized duty cycle Duty(k).

[0081] When the generalized duty ratio Duty(k)...

Embodiment 3

[0099] see Figure 1 to Figure 7 A current driver for a tripolar magneto-rheological damper comprises a current feedback circuit, a control circuit, a MOS tube drive circuit, a full bridge circuit and a current feedback circuit. Including current feedback circuit, control circuit, MOS tube drive circuit, full bridge circuit and current feedback circuit;

[0100] The current feedback circuit monitors the current in the magnetorheological damper coil, and sends the monitored current to the control circuit;

[0101] The control circuit receives the external expected current I(k) and the monitoring current i(k) sent by the current feedback circuit, and determines the duty cycle of the two PWM signals according to the expected current I(k) and the monitoring current i(k) ;

[0102] The control circuit generates two PWM signals and sends them to the MOS transistor drive circuit;

[0103] After the MOS tube drive circuit receives two PWM signals, it generates a switching tube cont...

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Abstract

The invention discloses a current drive of a tripolar magneto-rheological damper. The current drive comprises a current feedback circuit, a control circuit, an MOS transistor driving circuit, a full-bridge circuit and a current feedback circuit. Voltage applied to the two ends of the damper coil is controlled through three modes, so that the purposes of rapidly following expected current and reducing steady-state current fluctuation quantity are achieved.

Description

technical field [0001] The invention relates to the field of magneto-rheological damper control, in particular to a current driver for a tripolar magneto-rheological damper. Background technique [0002] Magnetorheological dampers are increasingly used in automobiles, buildings and other fields to attenuate vibrations because their damping characteristics can change with the change of their coil current. However, due to the existence of coil inductance, it is difficult for the current to change rapidly. Therefore, the current driver of the magnetorheological damper is designed to speed up the response speed of the current. However, the traditional current driver (chopper circuit) composed of a single MOS tube can only speed up the response of the current on the rising edge of the current, but cannot speed up the response speed on the falling edge of the current. Although the traditional bipolar current driver (half-bridge circuit) composed of dual MOS can speed up the resp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M3/157H02M1/08H02M1/088F16F9/53
CPCF16F9/535H02M1/08H02M1/088H02M3/157H02M3/158
Inventor 鲁红伟张志飞贺岩松
Owner CHONGQING UNIV
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