High frequency harmonic in electric power network can pollute the network, control high frequency harmonic is an important research problem in electrical system function.
电网中的高次谐波对电网有污染，抑制高次谐波是电力系统运行中的重要研究课题。
According to driving requirements of hybrid electric vehicle (HEV), a novel high frequency AC hybrid power control system is presented.
根据混合型电动汽车的性能要求，提出了一种采用高频交流的混合动力控制系统。
Elevator special inverter occurs along with the increases of buildings. It satisfies the demand of electric power drag system used in high performance elevators.
随着高层建筑日益增多，对高性能电梯的电力拖动系统要求越来越高，电梯专用变频器应运而生。
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