Sensorless control unit for brushless DC motor
US8890451B2 · kind B2 · utility
0Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2012 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Dec 9, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/21
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A command rotation speed is set to an initial rotation speed, and a forced commutation mode is started. In the forced commutation mode, a rotation speed is increased by a predetermined increase amount each time and forced commutation is executed until the rotation speed reaches a set rotation speed. Then, a switchover to the sensorless control mode is made when the rotation speed reaches the set rotation speed (S4) and a rotor position becomes detectable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.