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Method for identifying traction induction motor parameter of high-speed train

An induction motor and parameter identification technology, applied in the field of traction induction motor parameter identification, can solve problems such as poor practicability, improve observation accuracy, and achieve the effect of high-performance induction motor traction control

Active Publication Date: 2014-12-10
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of the prior art, such as relying on complex models and algorithms, and poor practicability, and to propose a parameter identification method for traction induction motors of high-speed trains

Method used

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  • Method for identifying traction induction motor parameter of high-speed train
  • Method for identifying traction induction motor parameter of high-speed train
  • Method for identifying traction induction motor parameter of high-speed train

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The principle and steps of the inventive method are as follows:

[0022] First measure the stator resistance of the traction induction motor. Use the driving circuit to send a small DC voltage to the motor, detect the current of the motor, and divide the DC voltage and the motor current to obtain the stator resistance value. Then a current closed-loop control is used for the traction induction motor. Two kinds of flux observers for traction induction motor: the voltage observer and the current observer work at the same time, use the rotor flux angle obtained by the voltage observer to perform coordinate conversion, and increase the speed of the traction induction motor to the rated speed point . At this time, the observation result of the voltage-type observer is more accurate, and the value of the excitation inductance can be obtaine...

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Abstract

A method for identifying a traction induction motor parameter of a high-speed train is disclosed. The method comprises the steps of: running two magnetic flux linkage observers synchronously and calibrating main model parameters such as a magnetic inductance and a rotor time constant set in a controller respectively in high-speed and low-speed running regions of the traction induction motor by utilizing respective advantages of a voltage type observer and a current type observer to enable the traction induction motor to be in a full-speed running range and enable the observation effects of the two magnetic flux linkage observers to be optimal. The method for identifying the traction induction motor parameter of the high-speed train can overcome the negative influence such as temperature rise of the motor and the excitation characteristic change, and realizes high-performance traction control.

Description

technical field [0001] The invention relates to a parameter identification method for field orientation control of a traction induction motor, in particular to a parameter identification method for a traction induction motor. Background technique [0002] In the field of electrified rail transit such as high-speed trains, high-power induction motors have been widely used due to their advantages of durability, low maintenance, and good mechanical characteristics. However, due to the electromagnetic characteristics of high-order nonlinear strong coupling of induction motors, it is difficult to control, and the general control method is difficult to meet the strict requirements of high speed, high power and excellent torque characteristics. It has excellent characteristics such as sufficient torque and wide speed range, and is currently a mainstream control technology in this field. [0003] Rotor field oriented control transforms the coordinates of the excitation current of t...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/13
Inventor 任晋旗马逊葛琼璇李耀华
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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