Brushless DC motor drive apparatus
US7348744B2 · kind B2 · utility
3Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2005 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Jan 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A brushless DC motor drive apparatus for driving a rotor includes a drive circuit rotating the rotor, a current shutdown and auto-restart circuit coupled to the drive circuit, and a DC voltage comparison circuit coupled to the current shutdown and auto-restart circuit. The current shutdown and auto-restart circuit detects blockage of the rotor via the DC voltage comparison circuit and shuts off the power to the drive circuit accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.