Huijun Li

Need help,MC3PHAC

Discussion created by Huijun Li on Jul 2, 2007
Latest reply on Mar 15, 2013 by poorni Rohit
I made a A/C motor drive board with MC3PHAC. The motor's rating is 220V/750W. Now the question is, when the motor runs at high speed(3000rpm/50Hz), everything is ok, but when it runs at 500rpm or slower, both the igbts and the motor become very hot. I don't know why? Can someone help me? Thanks!