The Power System Of Electric Drill Based On DC-AC

In accdrdance with employ actuality of our mine. We developed the power system of electric drill based on DC-AC. The system use the technique of SPWM frequency cowersation Control. It changed th D. C provided by trolly wire of D. C motor into stable A. C adopted IGBT and driving circuit adopted high speed module of EXB840. SPWMwave was generaled by 8031 Chip microprocessor and big scale 1C SA8282.It is beneficial to manufacture and application. It have extremely satisfactory economic benefit and social benefit.