Inverter having improved efficiency and regulation
US4317165A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1980 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Jun 17, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53846
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter circuit is disclosed in which the efficiency of the inverter is improved by interposing a small transformer winding between the transistors in a Darlington pair which are used to switch the primary current of the inverter. The winding couples energy from the transformer into the Darlington pair at a polarity which opposes the characteristic junction potential of the output transistor. This substantially reduces the saturation voltage of this output transistor. The regulation of the output voltage is improved by detecting the RMS value of the output voltage and using the detected RMS value of the output voltage for controlling the width of pulses applied to the primary of the transformer of the inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.