Driver for switching element and control system for rotary machine using the same
US9112344B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Aug 30, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0027
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a driver, a dissipating unit dissipates, upon a potential difference between input and output terminals of a switching element being lower than a predetermined potential, electrical charge for overcurrent detection between the input and output terminals. The dissipating unit includes a rectifier having a pair of first and second conductive terminals. The first conductive terminal is connected to the input terminal of the switching element. An overcurrent determiner determines that an overcurrent flows between the input and output terminals of the switching element upon determination that electrical charge has not been dissipated by the dissipating unit despite the change of the switching element from the off state to the on state. A failure determiner determines whether there is a failure in the dissipating unit as a function of a potential at a point on the first electrical path from the failure determiner to the second conductive terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.