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 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;

Design scheme of multilevel drawbench frequency conversion timing control system;

Application of PLC in the Frequency Conversion Timing of Crane;

By simple improvement of hardwire circuits,mutual switch between frequency conversion timing operation and Y/△ operation in the machine is conveniently and reliably realized,the failure time is reduced.