多通道逆变器的空间矢量调制调压技术研究.pdf

航空电源航空科技重点实验室学术年会(APSC’2006)论文集 多通道逆变器的空间矢量调制调压技术研究 蔡振鸿 谢少军 （南京航空航天大学，江苏 南京 210016 ） Research on Multi-step Inverter with Space Vector Pulse Width Modulation Technology CAI Zhen-hong XIE Shao-jun (Nanjing University of Aeronautics Astronautics, Nanjing, 210016) Abstract: Because of low switching frequency and 到良好的输出电压波形。 high efficiency, multi-step inverters (staircase 关键词：逆变器； 多通道； SVPWM waveform inverters) are suitable for high power applications. However, the output-voltage of traditional 1 引言 multi-step inverters can’t be adjusted. Using the 多通道逆变器（阶梯波合成逆变器）具有 SVPWM (Space Vector Pulse Width Modulation) 输出波形好，开关频率低等优点。它由多个逆 technology to adjust multi-step inverters is discussed in 变桥构成，每个逆变桥可以均分功率，单个逆 this paper. With asymmetry SVPWM strategy the 变桥功率较小，经过组合后可以实现较大的功 optimum switching frequency and the optimum sample 率容量，而且输出侧具有变压器，可以实现低 deviation angle are given by analyzing the principle and 高压的转换和电气隔离。但传统的多通道逆变 performance of 4-step inverter. To certify the feasibility 器本身不具备调压功能。为了实现调压，一般 of the asymmetry SVPWM technology, the simulation 需要前级的直流变换器调压或采用移相调压 results of 2-step, 4-step and 6-step inverters and the 技术[1] 。前者由于单台直流变换器处理全部功 experimental results of 4-step inverters are given in this 率，功率器件应力较大，工程实现较难，而且 paper. While the asymmetry SVPWM scheme is used, 有两级变换，效率受限制