Sensorless motor control device
US8314579B2 · kind B2 · utility
9Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Jan 26, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/64
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sensorless motor control device includes a magnetic pole position estimating unit that does not use a sensor to detect a magnetic pole position of a motor having a salient rotor, and overlays a high-frequency current on the motor to estimate the magnetic pole position of the rotor of the motor; and a high-frequency current control unit for changing a magnitude of the high-frequency current based on a magnitude of one of a torque and a current of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.