Method and apparatus for controlling an electric machine
US9800183B1 · kind B1 · utility
2Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | May 18, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter electrically operatively connected to an electric machine and in communication with a controller is described. The inverter is electrically connected to a high-voltage DC power bus. A method for controlling the multi-phase inverter circuit includes monitoring, via the controller, a rotational speed of the electric machine during operation of the inverter in an over-modulation mode. The inverter is commanded to operate in a linear modulation mode when the rotational speed is within a speed range associated with objectionable audible noise generated by operating the electric machine in the over-modulation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.