The frequency inverters has a function of variable voltage and variable frequency.

频率逆变器具有变压、变频功能.

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The Application of Speed Modulation Technology of Variable Voltage Variable Frequency on Old Elevator Renovation.

变频变压调速技术在旧电梯改造上的应用.

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The AC VVVF ( Variable Voltage Variable Frequency ) speed regulation is a integrated technology.

交流变频调速技术,是一门综合性的技术.

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A new improved discrete variable voltage variable frequency equivalent sinusoidal control method is presented.

一种新的离散变压变频等效正弦控制方法被提出.

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