Initial pole position estimating apparatus and method for AC...

Details Initial pole position estimating apparatus and method for AC... Initial pole position estimating apparatus and method for AC...

2011-01-18

2011-01-18

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

C318S705000, C318S717000, C318S400320, C318S560000

Reexamination Certificate

active

07872438

ABSTRACT:
The present invention provides an initial pole position estimating apparatus and method for an AC synchronous motor without using magnetic pole detector. The initial pole position estimating apparatus includes a thrust force or torque pattern generating portion for generating a thrust force or torque pattern, a pole position command generating portion for generating a pole position command, and a position detecting portion for detecting a position of the AC synchronous motor. The initial pole position estimating apparatus can estimate an initial pole position in a short time with high precision without depending on a fluctuation in a load. The initial pole position estimating apparatus further includes a pole position correcting portion (8) for correcting the pole position command and a thrust force or torque pattern correcting portion (9) for correcting the thrust force or torque pattern, and an initial pole position is estimated through a repetitive correction.

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