Power conversion device
US9692332B2 · kind B2 · utility
14Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2015 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Feb 17, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A failure in the activation, of a motor, caused by external noise superimposed on an induced voltage is reduced. A detection circuit is connected to a connection node provided between an upper-arm switching element and a lower-arm switching element, and detects the induced voltage of a fan motor before activation. The switching controller activates the fan motor in accordance with a result of detection by the detection circuit. While the detection circuit detects the induced voltage, the switching controller performs switching control which involves alternately turning ON and OFF of the lower-arm switching element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.