Method for driving a brushless DC motor
US6522093B1 · kind B1 · utility
28Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Aug 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for driving a brushless DC motor is disclosed in accordance with the present invention. Firstly, a driving control signal is generated based on sensed information of a motor rotor's magnetic field distribution. The driving control signal is inactive in the case that four rotor magnetic arcs are rotated more or less than critical positions of the rotor corresponding a stator. At that time, no magnetic fields are produced from the motor's stator, and thus the rotor rotates by inertial force. In another case, the driving control signal is issued in a conventional manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.