Semiconductor element drive device having a plurality of protection circuits and outputting a protection operation notification signal that identifies which of the protection circuits detected a problem
US8779929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2011 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Jun 14, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/0806
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor element drive device which individually drives semiconductor elements configuring a power converter includes plural protection circuits which detect information necessary for carrying out a protection operation for the semiconductor elements, an alarm signal output circuit which, having set therein pulse signals with pulse widths differing from one of the plural protection circuits to another, continuously outputs a pulse signal corresponding to a protection circuit, among the plural protection circuits, which has first detected that a protection operation is necessary, as an alarm signal during a period in which it is detected that the protection operation is necessary, and a notification signal output circuit which, when the alarm signal is output from the alarm signal output circuit, outputs one pulse thereof equivalent to the set pulse width as a protection operation notification signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.