Programmable DC-TO-AC voltage converter
US4466052A · kind A · utility
Inventor
Key dates
| Filing date | Dec 14, 1981 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Dec 14, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53873
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A programmable DC-TO-AC voltage converter for converting a DC voltage signal provided across two DC voltage terminals to an AC voltage signal having predetermined characteristics. The system includes an AC voltage terminal; a first switch connected between the AC voltage terminal and one of the DC voltage terminals; a second switch connected between the AC voltage terminal and the other of the DC voltage terminals; and a bistable switching circuit coupled to the first and second switches for operating the first and second switches to alternatively connect either the one DC voltage terminal or the other DC voltage terminal to the AC voltage terminal in an alternating high frequency sequence to provide a high frequency pulsed voltage signal at the AC voltage terminal. The bistable switching circuit sequentially provides a pulse-width-modulated control signal to operate the first and second switches at a predetermined high frequency; and varies the duty cycle of the control signal pulses at a predetermined low frequency in accordance with a predetermined waveform pattern at the predetermined low frequency to thereby vary the duty cycle of the high frequency pulsed voltage signal at th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.