Device and method for monitoring a power semiconductor switch
US9829534B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 2014 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | May 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for monitoring a power semiconductor switch includes a circuit section for applying to the power semiconductor switch an HF voltage having a frequency above a switching threshold of the power semiconductor switch, a shunt resistor for detecting an actual HF current resulting from application of the HF voltage to the power semiconductor switch, a monitoring circuit for comparing the actual HF current with an expected HF current that depends on a switching state of the power semiconductor switch when the HF voltage is applied to the power semiconductor switch, and a comparator for generating a power semiconductor status signal depending on a result of the comparison. A corresponding method for monitoring a power semiconductor switch of this type is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.