Non-invasive front-end for power electronic monitoring
US12158490B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2021 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | May 6, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53871
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A front-end device for monitoring operation of an associated electric power device with semiconductor power switches generating a power output, e.g. a three-phase power output. The front-end device has input terminals arranged for connection to the electric phase(s) of the power output of the associated electric power device, and an electric circuit connected to the input terminals and connected to at set of output terminals. The electric circuit has a passive interconnection comprising electric semiconductor switches and diodes. The electric circuit serves to electrically block any high voltage component from the input terminals from reaching the output terminals, while allowing an on-state voltage of at least one semiconductor power switch in the associated electric power device to pass to the at least two output terminals. The front-end allows low voltage equipment to be connected to its output terminals for determining an on-state voltage of switches of the electric power device. Especially, embodiments with self-powered reference voltage circuits provided by zener diodes allow compact low cost versions for use in e.g. portable test equipment or as part of permanently installed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.