Control system for power converter
US4675799A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1983 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Oct 4, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/515
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power converter such as an inverter or chopper using self-turn-off type semiconductor devices supplies power to an inductive load and free wheel diodes are provided so that the current flowing through this load circulates not through the power supply but through the free wheel diodes. When it is detected that the load current exceeds a predetermined value, the self-turn-off-type semiconductors which are conductive are turned off. At this time, the self-turn-off-type semiconductors which are turned on and immediately thereafter cause the recovery current to flow in the free wheel diodes are turned off not immediately but after the recovery current disappears.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.