关键词: 同步磁阻电机, 最大转矩电流比控制, 虚拟信号注入法, 参数非线性变化, 电感参数扫描, 双向增量电感探测机制

Abstract: Inductance parameters in the torque model of the traditional virtual signal injection method (VSIM) are constant, and have errors compared to the real synchronous reluctance motor (SynRM) model with nonlinear variation of parameters.The VSIM cannot achieve accurate maximum torque per Ampere (MTPA) control. To solve the problem, an inductance scanning method based on the virtual bipolar square wave signal injection method was proposed.The extreme seek of the current vector phase angle by optimizing the inductance parameters in the torque model of the VSIM was indirectly achieved.The bidirectional incremental inductance detection mechanism was proposed by adjusting the step size and the direction of the search flexibly to improve the retrieval efficiency. The algorithm combined the advantages of the search method which takes the parameter nonlinear variation into account, and that of the traditional VSIM which is easy to calculate and responds quickly.

Key words: synchronous reluctance motor (SynRM), maximum torque per Ampere (MTPA) control, virtual signal injection method (VSIM), nonlinear variation of parameter, inductance scanning method, bidirectional incremental inductance detection mechanism