摘要
针对高频链逆变器正弦脉宽脉位调制(SPWPM)中周波变换器开关工作在高频时开关损耗较大的缺点,研究了一种新的周波变换器的控制方法。在功率因数接近1的应用场合,周波变换器开关只需要工作在输出电压频率,可有效减小变换器的开关损耗。基于单相推挽型高频链逆变器拓扑详细分析了相应的控制及其调制方法。结合这种周波变换器控制,研究了电压外环准比例谐振(PR)控制电感电流内环比例控制的双闭环控制策略。通过仿真和试验,证明了控制方案的可行性和有效性。
In view of the condition that frequency converter switches of high-frequency link inverter SPWPM（sinusoidal pulse width and position modulation） working in high frequency had high losses, a new control method was studied. When the load power factor was closed to 1, frequency converter switches only needed to work in output voltage frequency, which reduced the switching losses of the converter effectively. Based on the single-phase push-pull type high-frequency link inverter topology, control and modulation methods were analyzed in detail. Combined with the frequency converter control, the double closed-loop control, outer voltage quasi PR（proportion resonant） control, and inner inductance current proportion control were studied. The simulation and experiment showed the reliability and feasibility of the control scheme.
出处
《机车电传动》
北大核心
2017年第4期44-47,共4页
Electric Drive for Locomotives
关键词
高频链逆变器
SPWPM
周波变换器
PR控制
双闭环控制
high-frequency link inverter
SPWPM
frequency converter
PR control
double closed-loop control
