Motor controller, washing machine, air conditioner and electric oil pump
摘要
A motor controller (1, 1b) capable of suppressing a large speed change generated at the time of changeover from a synchronous operation mode to a position feedback operation mode and implementing even acceleration characteristics regardless of the load torque (Ä) by estimating a torque of a permanent magnet motor (6) in the synchronous operation mode for driving the permanent magnet motor and setting an initial value of a current command value in a position sensor-less operation mode on the basis of information of the torque estimated value (Ä^).
申请公布号
EP1748544(A3)
申请公布日期
2009.07.29
申请号
EP20060015777
申请日期
2006.07.28
申请人
HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO. LTD.;HITACHI CAR ENGINEERING CO., LTD.