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Motor simulator current tracking method and system

A motor simulation and current tracking technology, applied in the field of power electronics, can solve problems such as unsatisfactory target response speed and difficulty in adapting PID control to requirements, and achieve the effects of small space requirements, low noise levels, and high safety factor

Active Publication Date: 2018-07-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the motor simulator control process, although the traditional PID control can realize the dynamic adjustment of the target object, the target response speed is not satisfactory. When a certain system has high requirements for the dynamic effect and robustness of the target , the traditional PID control is difficult to adapt to the requirements

Method used

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  • Motor simulator current tracking method and system
  • Motor simulator current tracking method and system

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Embodiment 1

[0030] see figure 1 , the present embodiment provides a motor simulator current tracking method, comprising the following steps:

[0031] S1: Establish the switch matrix phase voltage equation and the switch matrix state equation in the motor simulator, and establish the motor simulator state equation according to the switch matrix phase voltage equation and the switch matrix state equation;

[0032] S2: Sampling the load current of the motor simulator, establishing a prediction model of the load current of the motor simulator according to the state equation of the motor simulator and the load current, and obtaining the predicted value of the load current of the motor simulator according to the prediction model;

[0033] S3: Construct the system evaluation function according to the load current prediction value, calculate the evaluation function value of each group of alternative switch states according to the evaluation function, and select the switch state corresponding to t...

Embodiment 2

[0105] Corresponding to the above method embodiments, this embodiment provides a motor simulator system, such as Figure 8 As shown, the motor simulator system includes:

[0106] Predictive controller, including motor model and current predictive control, the motor model is used to realize the solution of the motor model, the current predictive control is used to sample the load current of the motor simulator, and the motor simulation is established according to the state equation of the motor simulator and the load current According to the prediction model of the load current of the motor simulator, the predicted value of the load current of the motor simulator is obtained according to the prediction model, and it is also used to construct the system evaluation function according to the predicted value of the load current, and the evaluation function value of each group of alternative switch states is calculated according to the evaluation function. The switch state correspon...

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Abstract

The invention relates to the technical field of power electronics, and discloses a motor simulator current tracking method and system. Motor stator current is accurately, rapidly and flexibly tracked,and real and reliable simulation environments are provided for fault injection, diagnosis and fault-tolerant techniques of a traction motor. The method includes the steps: firstly, building a switchmatrix phase voltage equation and a switch matrix state equation in a motor simulator, and building a motor simulator state equation according to the switch matrix phase voltage equation and the switch matrix state equation; secondly, sampling load current of the motor simulator, and building a prediction model of the motor simulator load current according to the motor simulator state equation andthe load current; finally, establishing a system evaluation function according to a load current prediction value, calculating evaluation function values of each group of alternative switch states according to the evaluation function, and selecting a switch state corresponding to a minimum evaluation function value as a switch state of the next moment of a switch matrix.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a method and system for tracking a motor simulator current. Background technique [0002] With the continuous development of modern rail transit technology, the safety of high-speed trains has become the primary issue in the operation and development of high-speed railways. Traction motor is one of the key equipments for the safety of high-speed train operation. Whether it works normally directly affects whether the high-speed train can run safely and stably. If the traction motor breaks down and fails to detect and eliminate it in time, it will lead to bad commutation and even vicious accidents such as rotor seizure, difficulty in turning and cracked shaft. Therefore, it is very important to study the fault injection of high-speed train traction motor and the operation state of the whole system after injection. [0003] At present, when using induction motors as syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 彭涛刘博阳春华杨超陶宏伟但汉兵杨笑悦武岳贺泽洲尹进田
Owner CENT SOUTH UNIV