異步牽引電機起動峰值電流抑制控制策略研究

異步牽引電機起動峰值電流抑制控制策略研究
摘 要： 針對DTC模式下異步牽引電動機起動峰值電流過大的問題，提出了一種抑制異步牽引電機起動峰值電流的轉矩和磁鏈分時控制策略。根據(jù)兩相靜止 坐標系下異步電機的數(shù)學模型，利用Matlab/Simulink軟件包中的S函數(shù)模塊和基本模塊，構建出直接轉矩控制系統(tǒng)的仿真模型，對交流異步電動機在不同控制策略下的起動過程進行了動態(tài)仿真。仿真結果與目前牽引電機運行的數(shù)據(jù)接近，證明了該仿真模型的合理性和有效性；同時，仿真結果表明轉矩和磁鏈分時控制策略至少可以降低2/3的起動峰值電流。
關鍵詞：異步電動機；起動峰值電流；直接轉矩控制；Matlab

Research on Control Strategy for Suppression of Asynchronous Traction Motor Starting Peak Current

Abstract：For the problem of asynchronous traction motor starting peak over-current in the DTC system, this paper proposes torque and flux linkage time-shared control strategy for suppression of asynchronous traction motor starting peak current. According to dynamic mathematical model on αβ coordinate system of asynchronous motor，the simulation model of the DTC system is established by using S-Function and standard modules in Matlab/Simulink software package. The research on the simulation of start-up proceeding of AC asynchronous motor is carried out with the use of the model under different control strategies. Simulation results and the motor operation data at present are close, which testifies the accuracy and the effectiveness of the simulation model; At the same time, the simulation results indicate that torque and flux linkage time-shared control strategy can reduce two thirds starting peak current.
Key words：Asynchronous motor; Starting peak current; Direct torque control; Matlab