Analytical method for electromagnetic bearing switch power amplifier

An electromagnetic bearing, switching power technology, applied in the direction of instruments, measuring electricity, electrical components, etc., can solve the problems that affect the reliability of the stability analysis results of the electromagnetic bearing control system, cannot fully reflect the output current characteristics, and the system model is inaccurate.

Inactive Publication Date: 2009-05-13
BEIHANG UNIV
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Problems solved by technology

Therefore, the disadvantage of the prior art method is that the nonlinear characteristics of the electromagnetic bearing switching power amplifier are not considered, but the nonlinear system of the electromagnetic bearing switching power amplifier is analyzed by using the transfer function model method adopted in the analysis of the linear system
This approximate processing method cannot fully reflect the output current characteristics of the actual system, resulting in inaccurate results of the actual system model, which will eventually affect the reliability of the stability analysis results of the electromagnetic bearing control system

Method used

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  • Analytical method for electromagnetic bearing switch power amplifier
  • Analytical method for electromagnetic bearing switch power amplifier
  • Analytical method for electromagnetic bearing switch power amplifier

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Embodiment Construction

[0034] The specific content of the present invention is introduced in conjunction with an electromagnetic bearing switch power amplifier system.

[0035] The steps that the inventive method implements are as figure 1 shown.

[0036] (1) Equivalent the actual electromagnetic bearing switching power amplifier system

[0037] After the actual electromagnetic bearing switching power amplifier system is equivalent, its system structure block diagram is as follows figure 2 As shown, it is mainly composed of four links: current controller 1, pulse width modulation generator 2, electromagnetic bearing load coil 3 and current sensor 4; the current sensor 4 detects the actual current signal in the electromagnetic bearing load coil 3, and the signal The current error signal generated by the current given signal is input to the current controller 1; the adjusted current error signal generated by the current controller 1 is input to the pulse width modulation generator 2; the output vol...

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Abstract

Provided is an analysis method used for the electromagnetic bearing switch power amplifier, the invention is a method which can be used to analyze the output current characteristic of the loading coil of the electromagnetic bearing switch power amplifier system. The method equally effects the practical electromagnetic bearing switch power amplifier system, and gets the nonlinear model of the pulse width modulation generator according to the switching function model of the power main circuit, the pulse width modulation generator is provided with harmonic linearization treatment using harmonic linearization principle. The invention realizes the harmonic linearization of the electromagnetic bearing switch power amplifier whose essence is a nonlinear system, the invention can not only simplify the analysis to the electromagnetic bearing switch power amplifier system, but accurately describe the output current characteristics of the electromagnetic bearing switch power amplifier, the invention brings more convenient to the stability analysis of the electromagnetic bearing controlling system.

Description

technical field [0001] The invention relates to an analysis method of an electromagnetic bearing switch power amplifier system, which is used for analyzing the current output characteristics of the electromagnetic bearing switch power amplifier. Background technique [0002] Electromagnetic bearing is a high-tech electromechanical integration product. It has the advantages of high speed, no friction, long life, no lubrication, no pollution, etc. It is used in aerospace, high-speed machine tools, turbomachinery and centrifuges, vacuum and ultra-clean room technology and other fields have broad application prospects. As the actuator of the electromagnetic bearing control system, the performance of the power amplifier will directly affect the stability of the electromagnetic bearing control system. [0003] When analyzing the electromagnetic bearing switching power amplifier, the methods in the prior art are all equivalent to the electromagnetic bearing switching power amplifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/00G01R31/00
Inventor 房建成张亮刘刚刘虎
Owner BEIHANG UNIV
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