variable frequency crystal oscillator 可变频率晶体振荡器 variable frequency electric drive 变频电气传动 variable frequency EPR spectrometer 变频电子顺磁共振波谱仪 ..
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adjustable frequency electric drive 可档率电力驱动 ; 可调频率电力驱动
variable-frequency electric drive 变频电气传动
A novel drive system with high frequency AC pulse density modulation 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。
High power GTO inverter is used for railway electric traction. Its PWM control is significantly different from variable frequency drive system in conventional industrial area.
大功率GTO逆变器用于铁路电力牵引，其PW M控制与一般工业领域中的变频调速系统的PWM控制有很大不同。
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