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移相式SPW M 技术是将自然采样SPWM 技术与多重化结构相结合,在较低的开关频率下,可实现等效高频载波的效果。由于特大功率电力电子器件(例如GTO 等)开关频率上限较低,上述特点不仅使特大功率变流器采用SPW M 技术成为可能,并且使开关损耗小,输出谐波分量少,控制快速性好等。对该项技术进行了详细的理论推导,并给出了仿真结果,预计在大功率变流系统中有着广泛的应用前景。
The phase-shifted SPW M technology combines natural-sampling SPWM technology with multiple structures to achieve equivalent high-frequency carrier effects at lower switching frequencies. Due to the low upper limit of the switching frequency of very high power electronic devices (such as GTO), the above features not only make SPW M technology possible for ultra-high power converters, but also make the switching losses small, the output harmonic components less and the control fast Wait. A detailed theoretical derivation of this technique is given, and the simulation results are given. It is expected that it will have a wide range of applications in high power converter systems.