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中文摘要：
针对电动汽车要求驱动电机具有大范围调速要求和目前任何单种基本调制方式都无法做到全调制比范围内性能最优的问题,提出了一种综合的调制策略：在低调制比阶段使用传统的SVPWM策略,在高调制比阶段使用DPWM策略,并提出一种基于零矢量分配的过渡策略,使得两种调制方式可以平滑的过渡.这种方法使得电压波形质量,开关损耗以及电压线性范围得到优化.最后,搭建了基于Simulink 的仿真模型,结果表明提出的方法可提高大范围调速电机的运行效率,为系统的高效运行提供了有效途径.
英文摘要：
Aimed at the problem that electric vehicles require driving motor to operate in a wide range of speedand no modulator has an overall superior performance,an integrated voltage modulation strategy was propsed,whichutilized the conventional SVPWM method in the low modulation range and the DPWM method in the high modulationrange. A switching strategy based on zero- vector for two kinds of modulation methods to switch smoothly was alsoproposed. As a result,the voltage waveform quality,switching losses,voltage linearity range were optimized. Finally,the simulation was set up to demonstrate the superiority of this method,providing an effective way for the efficientoperation of the system.
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