The ball mill is the key equipment for the material to be broken, and then crushed. Widely used in cement, silicate, new building materials, refractory materials, fertilizer, black and non-ferrous mineral processing as well as glass, ceramics and other manufacturing industries, a variety of ores and other grind-able materials, dry or wet grinding. I produced the ball mill using special inverter VVVF technology mill drive system to meet the mill running at low speed, large starting torque characteristics, speed continuously adjustable ball mill. Motor starting, the impact of current from the power away from enough, the protection function. To ensure the quality of the process control and saving maintenance costs. I produced the mill workers like need to drive ratio changed to A, the normal operation of inverter operation at a given frequency is set to B (less than 50HZ) to run current operating voltage for the C (380V) D (less than 180A system) After transformation the average annual power E (C * D * working hours per day * 365). System transformation of the former power frequency 50HZ, running current of 180A operating voltage of 380V, an average annual power consumption F (90 * per day * 365). Saving rate (1-E / F)%.