中国电机工程学报Issue(5)：1211-1220,10.DOI:10.13334/j.0258-8013.pcsee.2015.05.023
谐波电流最小同步优化脉宽调制策略研究
Research on Synchronous Minimum Harmonic Current Optimized Pulse Width Modulation Strategies
摘要
Abstract
On high-capacity AC drives, one major concern is the switching loss of the power semiconductor devices, so the switching frequency is limited under a certain level, typically below 1 kHz. In that case suppressing the harmonics in the phase current of the inverter plays an important role when it is working under the condition of a low carrier-frequency ratio. In order to optimize the harmonics in the phase current, the modulation waveform needs to be accurately controlled when the three-phase three-leg VSI is working with a low carrier-frequency ratio. Therefore, the Programmed Optimized Modulation Strategies are proposed. Incorporated with the constraints of minimizing the harmonic current, the optimized PWM output is derived mathematically through controlling every individual switching timing accurately. This approach benefits the harmonics suppression more than the conventional method of carrier modulating. this paper took the two-level three-phase three-leg VSI suffering from stronger harmonics than conventional AC drive applications as an example to implement the algorithm of the optimized harmonic current PWM with more accurate optimizing constraint condition than the one mentioned before. The comparison of the resulting current to the solution given by the conventional approach of modulation is presented, followed up with validation through simulations and experiments.关键词
谐波电流抑制/谐波电流最小脉宽调制/同步调制Key words
harmonic current restraint/minimum harmonic current PWM/synchronous modulation分类
信息技术与安全科学引用本文复制引用
马逊,李耀华,葛琼璇,任晋旗,赵鲁,赵震..谐波电流最小同步优化脉宽调制策略研究[J].中国电机工程学报,2015,(5):1211-1220,10.基金项目
国家自然科学基金项目(51177159)。Project Supported by National Natural Science Foundation of China (51177159) （51177159）
