Patent · US Active

Method and apparatus for estimating an angle offset of an angle sensor

US10126150B2 · kind B2 · utility

1Cited by

5References

20Claims

0Family size

Assignee

ABB Schweiz AG · CH

Inventors

Antti Piippo · Espoo, FI
Matti Eskola · Espoo, FI
Samuli Kallio · Helsinki, FI

Key dates

Filing date	Mar 22, 2017
Grant date	Nov 13, 2018
Priority date	—
Expiry date	May 16, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH02P6/20
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present disclosure describes a two-stage method for estimating an angle offset of an angle sensor in a system comprising a permanent-magnet synchronous motor. An initial value for the estimated angle offset is first determined with a short circuit test. Next, a torque of the motor may be controlled so that the motor is maintained at a zero speed. Minor adjustments are made to the value of the angle offset to find a minimum magnitude of stator current. A value at which the stator current is at its minimum is used as a final angle offset.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.