Series resonance charge transfer regulation method and apparatus
US4523269A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1983 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Nov 16, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/2576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC to N phase AC converter, where N is an integer greater than 2, includes a DC source having first and second terminals for deriving equal amplitude opposite polarity DC voltages, a series resonant circuit, and N output terminals, one for each phase of the converter. The series resonant circuit is selectively connected in series with the first and second terminals and the N output terminals for an interval equal to one half cycle of the resonant circuit resonant frequency, so that current flows between a selected one of the first and second terminals and the resonant circuit and a selected one of the N output terminals during the interval. The resonant circuit current is zero at the beginning and end of the interval. A capacitor shunting each of the output terminals has a value relative to the capacitance of the series resonant circuit such that the voltage across each output terminal remains approximately constant between adjacent exchanges of energy between the resonant circuit and the output terminal. The selective connection is in response to a comparison of the actual voltage across each of the N output terminals and a reference voltage for each of the N output terminals. T…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.