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Calculation method and system of flux linkage

A calculation method and technology of flux linkage, applied in the field of calculation method and system of flux linkage, can solve problems such as amplitude error, large distortion, and difference in waveform sine degree.

Inactive Publication Date: 2016-07-27
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
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Problems solved by technology

These situations bring great inconvenience to the practical application
In order to solve the problems of integrator saturation and DC offset caused by pure integration, a low-pass filter with a lower cut-off frequency is usually used to replace the pure integrator, which can suppress the DC offset of the input signal, but at the same time cannot Avoiding the introduction of amplitude error and phase error, causing nonlinear distortion and saturation drift problems, making the final output waveform sine degree poor and distorted

Method used

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  • Calculation method and system of flux linkage
  • Calculation method and system of flux linkage
  • Calculation method and system of flux linkage

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Embodiment Construction

[0054] The core of the present invention is to provide a calculation method of flux linkage, which can eliminate nonlinear distortion and saturation drift problems, and realize full compensation of amplitude and phase, so that the final output waveform has better sine degree and little distortion; in addition, through Limiting processing can realize the adjustment of the amplitude, thereby effectively eliminating the DC offset of the output waveform; another core of the present invention is to provide a flux linkage calculation system.

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the ...

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Abstract

The invention discloses a calculation method and system of a flux linkage, applied to a stator or a rotor. The calculation method of the flux linkage comprises feed-forward integral treatment, coordinate conversion, amplitude limiting treatment and low-pass filtering treatment for an input voltage; the feed-forward integral treatment and the low-pass filtering treatment compose a double-integral link which can remove problems of nonlinear distortion and saturated drifting, realize complete compensation of an amplitude value and a phase, and enable the finally output waveform to have a good sine degree and very low distortion. In addition, adjustment of the amplitude value can be realized through the amplitude limiting processing, so that the amplitude is not greater than a preset stator or rotor flux linkage amplitude value. Therefore, the direct current offset of the output waveform can be removed efficiently.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a calculation method and system for flux linkage. Background technique [0002] In the control of asynchronous motors, it is often necessary to control the flux linkage of the asynchronous motor. The calculation accuracy of the flux linkage greatly affects the stability of the system. The calculation of the stator flux linkage of the asynchronous motor (similar to the rotor flux linkage) The formula is as follows: [0003] [0004] in, is the component of the stator flux linkage on the α axis, is the component of the stator flux linkage on the β axis, u αs is the component of the stator voltage on the α-axis, u βs is the component of the stator voltage on the β-axis, R s is the stator resistance, i αs is the component of the stator current on the α-axis, i βs is the component of the stator current on the β axis; [0005] make [0006] According to formula (1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/26H02P21/28
Inventor 刘可安尚敬许峻峰梅文庆黄佳德文宇良刘勇张少云曾小凡谭娟
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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