Self-oscillating DC to DC converter
US4424556A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1981 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Aug 13, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3384
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A self-oscillating DC to DC converter which includes either two or four transistors, three transformers (a converting transformer, a driving transformer and a current transformer) and an inductance. The operating frequency of the converter is fixed by the saturation time of the driving transformer. The base currents of the transistors are mainly supplied by the current transformer so as to be in proportion to the collector currents of the transistors. The operating frequency of the converter is kept constant in spite of load fluctuations. The inductance which is connected in series between a winding of the converting transformer and a winding of the driving transformer. The inductance prevents the two or four transistors from being `on` simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.