Electric motor control device
US11251727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2018 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Apr 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electric motor control device includes a rotation angle correction amount calculation unit that, based on a rotation angle signal for an alternating current electric motor output from an angle sensor and a current detection signal for the alternating current electric motor output from a detector, calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor, wherein the rotation angle correction amount calculation unit, based on a current detection signal when a short circuit is caused between winding terminals of the alternating current electric motor, calculates at least either one rotation angle correction amount of a direct current component rotation angle correction amount and an alternating current component rotation angle correction amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.