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Asynchronous traction motor flux linkage observation method based on iron loss model

A traction motor and iron loss technology, applied in the field of asynchronous traction motor flux linkage observation based on iron loss model, can solve the problems of large discrete error, not considering the influence of iron loss, parameter-sensitive integral saturation, etc.

Inactive Publication Date: 2016-10-26
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0003] The traditional model-based motor flux observation method has problems such as parameter sensitivity and integral saturation, and the traditional state observer-based motor flux observation method has problems such as large discrete error and complex pole configuration, and the above motor flux observation methods have not considered Effect of iron loss

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  • Asynchronous traction motor flux linkage observation method based on iron loss model
  • Asynchronous traction motor flux linkage observation method based on iron loss model
  • Asynchronous traction motor flux linkage observation method based on iron loss model

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] The method for observing the flux linkage of an asynchronous traction motor based on an iron loss model according to the present invention includes:

[0035] Based on the equivalent circuit of asynchronous traction motor considering iron loss in two-phase stationary coordinate system, an open-loop state observer considering iron loss is designed;

[0036] Improve the discretization algorithm of the open-loop state observer, obtain an improved open-loop state observer, and solve the problems of divergence of observation results and large observation errors in the medium and high-speed areas of the traditional first-order forward Euler method at low calculation frequencies;

[0037] Taking the stator current observation error as negative feedback, the feedback matrix is ​​designed to configure the poles of the closed-loop state observer to improve the co...

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Abstract

The invention relates to an asynchronous traction motor flux linkage observation method based on an iron loss model. Based on an asynchronous traction motor equivalent circuit considering the iron loss under a two-phase stationary coordinate system, an open loop state observer considering the iron loss is designed; a discrete algorithm for the open loop state observer is improved, and an improved open loop state observer is obtained; and with stator current observation errors as negative feedbacks, a feedback matrix is designed to carry out pole configuration on a closed loop state observer. Through steps such as design of the state observer considering the iron loss, design of the state observer discrete method and closed loop pole configuration, the convergence rate and the observation accuracy of the state observer are improved.

Description

technical field [0001] The invention relates to a traction transmission system of an EMU, in particular to an observation method for an asynchronous traction motor flux (rotor flux) based on an iron loss model. Background technique [0002] The control technology of asynchronous traction motor is the core technology of traction transmission system, and the field oriented control is still the most researched and applied at present. The performance of field oriented control depends on the complete decoupling of torque and flux linkage. For asynchronous traction motors, accurate observation of asynchronous traction motor flux (rotor flux) is the key to achieve decoupling. [0003] The traditional model-based motor flux observation method has problems such as parameter sensitivity and integral saturation, and the traditional state observer-based motor flux observation method has problems such as large discrete error and complex pole configuration, and the above motor flux observ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P21/26
CPCH02P21/13
Inventor 刁利军唐敬董侃尹少博刘志刚
Owner BEIJING JIAOTONG UNIV
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