AC-AC converter using switches in a DC link
US4894763A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power conversion system for converting polyphase AC power at a first frequency and voltage to AC power at a second frequency and voltage includes an input rectifier circuit and an output inverter circuit coupled by a DC link or interface comprising solid state devices. The interface includes a reversely-poled diodes connected between selected terminals of the rectifier and inverter circuits for carrying current in a forward direction. Controllable switches interconnect the same terminals for carrying current in a reverse direction to the inverter circuit. A controller responds to instantaneous current at the inverter terminals and to instantaneous input line voltages for selectively energizing the interface switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.