This controller integrates pulse width modulation(PWM) and pulse densitymodulation(PDM) together, and can easily change between the two modulations.
该设计集成了脉冲宽度调制（PWM）和脉冲密度调制（PDM）两种调制方式，并可以在两者间切换。
2
A novel drive system with high frequency AC pulse densitymodulation for electric vehicles is proposed, and its operation principle and control method are studied in detail.
提出了一种用于电动汽车的高频交流脉冲密度驱动系统并阐述了系统的工作原理和控制方法。
3
A novel topologic structure of high frequency AC pulse densitymodulation converter is proposed, and its operation principle, control scheme and design are described in detail.