People can easily design the hysteresis current control hardware circuit , but the switching frequency is variable which makes us difficult the design the output filter , moreover the output waveform is not good . the space vector modulation techniques , by selecting the zero vector properly , it can reduce the harmonic content of the output voltage , so it has become a popular control method 滞环电流控制的硬件电路设计简单,但存在开关频率不固定,输出滤波器设计困难,输出波形质量差,空间矢量控制( svm )技术具有较高的电压利用率,且通过对零矢量的合理控制可以降低谐波含量或降低开关损耗,因此是一种较好的控制方法。
In order to decrease the harmonics in mc ' s input and output current , the svm method and sinusoidal hysteretic band method are introduced into the mc hysteretic control respectively . secondly , based on the predictive current control fundamental principle , the particular 27 vectors predictive current control strategy and current trend predictive control strategy are proposed . the simulation indicates that all of the current methods can improve the mc ' s output current quality and speed its dynastic response 提出了矩阵变换器的滞环电流控制策略，并针对滞环控制时输入电流和输出电流的谐波，分别提出了输入电流空间矢量合成滞环控制方法和正弦环宽滞环控制方法；引入了矩阵变换器的预测电流控制新思路，在此基础上，提出了矩阵变换器独特的27矢量预测电流控制方法和趋势型预测电流控制方法，仿真结果表明，各种电流控制方法提高了变换器的输出电流品质，加快了变换器的动态响应性能。
Comparison research verifies its effectiveness on reducing the de - link losses and improving the output performance . the three topologies mentioned above are all presented with detailed theoretical analysis , parameters design , simulation and experimental verifications . a 6kw three - phase inverter system is accomplished in order to verify that the two - amplitude control technique is fit for high power application 第五章研究三相逆变系统的双幅谐振直流环节技术，完成了6kw实验系统，提出了滞环电流控制与空间矢量调制相结合的方案( hcc - svm )并首次采用cpld实现逻辑控制，大大降低了逆变器换流频率，缩短了控制延时，实现了逆变器的高效变换和低输出失真。
