摘要
给出了一种适合于交 -直 -交电力机车的脉宽调制 (PWM)方案 ,针对逆变器开关频率低的特点专门设计谐波优化 SPWM调制方法 ,提出中间 6 0°过渡方法 ,实现了异步 SPWM、同步 SPWM、谐波优化 SPWM以及方波工况间的平滑过渡。该系统完全由单片微机实现。
The pulse width modulation (PWM) scheme suitable for AC DC AC electric locomotive is presented in this paper. A optimized SPWM method is designed specially for the low switching frequency of voltage source inverter. The central 60° pulse pattern change method has been proposed to realize the smooth transition of individual PWM modes including the asynchronous SPWM, synchronous SPWM, optimized harmonic SPWM and square waveform. The whole system is implemented by the single chip microcontroller.
出处
《铁道学报》
EI
CSCD
北大核心
2000年第6期26-31,共6页
Journal of the China Railway Society
基金
铁道部科技研究开发计划项目(97J05-E-2)
关键词
交-直-交电力机车
电压型逆变器
PWM
SPWM
AC-DC-AC electric locomotive
voltage source inverter
PWM(Pulse Width Modulation)
SPWM(Sine Pulse Width Modulation)
