摘要
针对常规多相空间矢量PWM(SVPWM)实现复杂、需要大量计算的问题,研究了一种与其等效的简化PWM实现方法,提高了其实用性。首先,以5相逆变器为例,通过数学推导方法分析了多相逆变器基于谐波注入载波型PWM控制方法和直接数字式SVPWM控制方法之间的联系,分析结果表明:目标输出线电压为正弦波的多相逆变器SVPWM在本质上都与注入某种谐波的载波型PWM相同,二者在目标输出波形及特性上具有等价关系;然后,分析得到了几种不同多相SVPWM控制方式所对应的载波波形,并利用该关系和波形实现了与SVPWM等效的多相SVPWM控制方法。该方法在大大简化控制结构的基础上保持了SVPWM的良好控制性能,仿真和实验验证了所提出方法的有效性。
Realization of good performance of normal space vector PWM(SVPWM)technology in ship electrical propulsion is very complex and requires much computation.In reference to this problem,a simple method is worked out to improve the practicability of multi-phase SVPWM.Based on the five-phase inverter,the relation between the harmonic injecting carrier based PWM and the direct calcula-ting SVPWM for the multi-phase inverter is deduced and analyzed as the first step.The analysis shows that the SVPWM of multi-phase inverter whose output target line-voltages are sine wave are essentially the same with the carrier based PWMs into which some harmonics are injected.The target output waveforms and characteristics are equivalent despite the entirely different ways of realization.And then,the carrier reference waveforms of several kinds of multi-phase inverter SVPWM are obtained through analysis.By applying the carrier based PWM method,the equivalent PWM control of five-phase is implemented.Simulation and experiment results show that the method greatly simplifies the control system while keeping the same performance as the SVPWM.
作者
于飞
向东
周永超
YU Fei;XIANG Dong;ZHOU Yong-chao(College of Electrical Engineering,Naval Univ.of Engineering,Wuhan 430033,China)
出处
《海军工程大学学报》
CAS
北大核心
2018年第6期6-11,共6页
Journal of Naval University of Engineering
基金
国家自然科学基金资助项目(51307180
51407188)
海军工程大学自然科学基金资助项目(HGDKYJGZX15013)
