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Method for compensating digital control delay of magnetic bearing switch power amplifier

A digital control, magnetic bearing technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of adding additional computing resources, low tracking accuracy, and high current noise.

Active Publication Date: 2013-12-04
BEIHANG UNIV
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Problems solved by technology

[0008] The purpose of the present invention is: to overcome the shortcomings of the linear predictive control method that the current noise is large, the tracking accuracy is not high, and additional computing resources need to be added, and on the basis of not increasing any hardware circuits and software calculations, through an asymmetric sampling resistor network, Realize effective compensation for digital control delay of magnetic bearing power amplifier system

Method used

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  • Method for compensating digital control delay of magnetic bearing switch power amplifier
  • Method for compensating digital control delay of magnetic bearing switch power amplifier
  • Method for compensating digital control delay of magnetic bearing switch power amplifier

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Embodiment Construction

[0094] Such as figure 1 As shown, in the specific implementation process, the specific implementation steps of the present invention are as follows:

[0095] (1) Measure the total digital control system delay T of the magnetic bearing switching power amplifier d :

[0096] T d =T ad +T cal +T awa +0.5T c

[0097] Among them, T ad Indicates the AD sampling delay of the power amplifier system, T cal Indicates the calculation delay, T awa Indicates PWM waiting delay, T c Indicates the servo cycle of the system. T ad It can be obtained by multiplying the delay time of each sampling channel by the total number of sampling channels; the calculation delay can be directly obtained through testing; T awa according to the formula Calculated, where T p Represents the switching cycle of the power amplifier system, and the symbol "rem" represents the remainder operation after division.

[0098] (2) Under the condition that the maglev rotor bears radial load and falls on t...

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Abstract

The invention discloses a method for compensating digital control delay of a magnetic bearing switch power amplifier, which is a method capable of compensating the digital control delay of a magnetic bearing switch power amplifier. The method comprises the steps of setting asymmetric factors of asymmetric sampling resistor networks according to a linear model predictive control theory on the basis of measuring the digital control delay of a switch power amplifier system and equivalent inductance and resistance of a magnetic bearing winding, and finally setting the asymmetric sampling resistance networks according to the asymmetric factors. The method for compensating the digital control delay of the magnetic bearing switch power amplifier belongs to the technical field of magnetic bearing control and can be applied to the fast response and high-stable control of a high-speed magnetic suspension rotor system.

Description

technical field [0001] The invention relates to a method for compensating the digital control delay of a magnetic bearing switch power amplifier, which is suitable for fast response and high stability control of a high-speed magnetic suspension rotor system, and belongs to the technical field of magnetic bearing control. Background technique [0002] Magnetic suspension bearings have broad application prospects in aerospace, industrial production, modern military and other fields because of their outstanding advantages such as no friction, low vibration, easy realization of high precision and long life. [0003] In the magnetic bearing control system, the role of the switching power amplifier is to provide the corresponding current to the magnetic bearing coil to generate the required electromagnetic force. There are four types of electromagnetic bearing switching power amplifiers: pulse width modulation (PWM) type, sample and hold type, hysteresis comparison type and minimu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 房建成任元向岷陈建仔崔华信思博郭蕊
Owner BEIHANG UNIV
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