Variable-speed variable-frequency(VSVF),a new typed operational mode for the induction generator based wind power generation system is proposed based on the fractional frequency power transmission.

Transform of frequency control of motor speed of a planer;

Design and application of long-distance tape conveyor frequency control system;

The energy conservation technique transformation of compressor frequency control;

Optimization of operation parameters of waterflooding system considering variable frequency speed regulation;

Application of variable frequency speed regulation technique in pump control system;

Master/follower control type variable frequency speed regulation system;

The way that frequency conversion and lowing speed is introduced by compared three ways listed in the paper.

The way of frequency conversion and lowing speed that can adjust the point is introduced by comparing several ways listing in the paper.

The application of frequency conversion speed adjustment system and PLC in the gantry planer;

Using Frequency Conversion Technology Reconstruct the Product Line that Producing Hydrogen Peroxide;

Discussion on the frequency conversion and its correlative problems;

Application of PROFIBUS Communication Protocol on VVVF System of Spinning Production Line;

Application of Multi-Motor Common DC bus VVVF system;

Application of VVVF control technique for coal fired industrial boiler;