Method of estimating field pole position of synchronous motor, m

Details Method of estimating field pole position of synchronous motor, m Method of estimating field pole position of synchronous motor, m

Filed on

1998-02-13

Date issued

1999-11-30

Examiner

Sircus, Brian

Patent Class

Electricity: motive power systems

SubClass

Induction motor systems

SubSubClass

Primary circuit control

Other Related Categories

318806, 318807, 318809, H02P 528

Type

Patent

Status

active

Patent number

059948701

Description

ABSTRACT:
A power corresponding to an A/C voltage command id1* is applied in the d-axis direction of rotational coordinates of a stopped synchronous motor via a current control unit, a three-phase converting unit, and a power converter. Further, by using "an amplitude value of a current iq' in the q-axis direction of the rotational coordinates generated in response to the A/C voltage command id1*" which is fed back and detected via a current detector and a dq converting unit, a field pole position estimation value .theta. is converged. The field pole position is estimated by using the converged field pole position estimation value .theta. as a true value of the field pole position .theta. of the synchronous motor.

REFERENCES:
patent: 4258302 (1981-03-01), Plunkett
patent: 4694210 (1987-09-01), Elliott et al.
patent: 5585709 (1996-12-01), Jansen et al.
patent: 5689169 (1997-11-01), Kerkman et al.

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