Motor controller, washing machine, air conditioner and...

Details Motor controller, washing machine, air conditioner and... Motor controller, washing machine, air conditioner and...

2006-07-28

2009-11-17

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Synchronization systems

C318S400110, C318S400020, C318S779000, C318S721000

Reexamination Certificate

active

07619385

ABSTRACT:
A motor controller 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 by estimating a torque of a permanent magnet motor 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.

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