Surge current protection circuit and motor using the same
US8598820B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2009 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Jan 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/001
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surge current protection circuit, has a control unit having an output end, a photoelectric coupling and driving circuit, a silicon symmetrical switch having a control end, and a current-limiting resistor. The current-limiting resistor and the silicon symmetrical switch are parallel connected altogether and then serially connected to a load and an AC input, and the control end of the silicon symmetrical switch is connected to the output end of the control unit via the photoelectric coupling and driving circuit. The invention features low production cost, high reliability and improved power efficiency, and is capable of effectively suppressing surge current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.