Driving device for semiconductor element
US8564913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | May 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/122
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving device for driving a semiconductor element can include a plurality of protection circuits that detect information necessary for performing protection operation for semiconductor elements that include a power conversion apparatus, a pulse signal generation circuit that sets a pulse sequence signal with a pulse width differently for each of the protection circuits and outputs a pulse sequence signal corresponding to the protection circuit that has been first detected a need for protection operation. The device can also include an alarm signal forming circuit that forms an alarm signal by ON-OFF control of a switching element and externally outputs the alarm signal, and a protection operation state discrimination circuit that discriminates existence of a protection operation state based on the alarm signal from the alarm signal forming circuit, and an alarm control circuit that delivers the pulse sequence signal outputted from the pulse signal generation circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.