Frequency converting apparatus and control method for the apparatus
US7477530B2 · kind B2 · utility
4Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2006 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Jun 8, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/003
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The difference between internal processes of a power converting apparatus may bring about a heat difference in the apparatus. In the cooling process, it is presumed that the temperature change of the inverter or converter module may be made so great that the power converting apparatus may be less reliable. In order to overcome this shortcoming, the temperature of the internal module is measured and a cooling control of a cooling fan or the like is carried out on the measured result. This cooling control of the cooling fan causes the life of a switching element of the inverter or converter to be longer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.