Motor control apparatus
US7952313B2 · kind B2 · utility
2Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2008 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Jul 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control apparatus includes: an electric motor having an outer rotor and an inner rotor which can alter mutual relative phases; a phase alternation device which alters the relative phase; a phase position sensor which detects a phase position with respect to the relative phase; and a fail-decision control unit which sets the relative phase as a maximum value or a minimum value (that is, a most forcing phase and a most weakening phase) in a phase variable area of the phase alternation device in accordance with a rotation number of the electric motor when the phase position sensor does not work.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.