Motor controller, washing machine, air conditioner and electric oil pump
US7619385B2 · kind B2 · utility
22Cited by
9References
19Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | May 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor controller capable of suppressing a large speed change generated at the time of changeover from a synchronous operation mode to a position feedback operation mode and implementing even acceleration characteristics regardless of the load torque by estimating a torque of a permanent magnet motor in the synchronous operation mode for driving the permanent magnet motor and setting an initial value of a current command value in a position sensor-less operation mode on the basis of information of the torque estimated value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.