Design Method for Premium Efficiency Three Phase Asynchronous Motor

After the release and application of new energy efficiency and test standard,since most of the explosion-proof motors which were now using in the coal mine could not satisfy the newly efficiency standard,they will be obsoleted.Thus,need to design the premium efficiency motor used in coal mine.A method to develop the premium efficiency motor by adopting the cast copper rotor and adjusting the slot dimensions was given.Through the design and test of 180 frame-size 4 poles motor,verified this was a feasible method.