针对五相电机电压空间矢量多、控制复杂的问题,提出了一种优化的五相感应电机空间矢量脉宽调制(SVPWM)算法与仿真。依据矢量空间解耦理论与载波统一性理论,采用基于最大矢量的SVPWM算法,综合考虑电压脉动与开关损耗等因素,对算法进行了优化。建立了系统数学模型,进行了仿真验证,对仿真过程中产生误差的部分进行了分析和优化。仿真结果表明,优化后的算法满足电机控制的需求,与传统的SVPWM算法相比,谐波畸变率降低,开关损耗降低约20%。

Compared with the traditional threephase motor, five phase induction motor had many advantages. In order to solve the problem that the five phase motor had a lot of voltage space vector was difficult to control, an optimized algorithm of space vector pulse width modulation (SVPWM) for the five phase induction motor was proposed. Based on the vector space decoupling theory and the theory of carrier unity, the SVPWM algorithm based on the maximum vector was used to optimize the algorithm by considering the factors such as voltage ripple and switching loss. The mathematical model of the system was established, and the simulation results were verified. The simulation results showed that the optimized algorithm meets the requirements of the motor control, compared with the traditional SVPWM algorithm and simulation, the harmonic distortion rate was reduced and the switching loss was reduced by about 20%.

TM 346

国家自然科学基金面上项目(51177077)