Control of an electric machine
US8614557B2 · kind B2 · utility
3Cited by
32References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2010 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | May 26, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of controlling an electric machine that includes sequentially exciting and freewheeling a winding of the electric machine. The winding is excited in advance of zero-crossings of back emf in the winding by an advance angle, and the winding is freewheeled over a freewheel angle. The method then includes varying the advance angle and the freewheel angle in response to changes in the speed of the electric machine. Additionally, a control system for an electric machine, and a product incorporating the control system and electric machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.