DC to low frequency inverter with pulse width modulated high frequency link
US4339791A · kind A · utility
12Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1980 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Sep 19, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4807
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A variable duty cycle ultrasonic inverter is used to invert unregulated direct current into a high frequency variable pulse width modulated signal that is applied to a low frequency inverter by means of a high frequency transformer. The output of the low frequency is applied to an output filter where a feedback signal is coupled back to the variable duty cycle ultrasonic converter which is controlled by a comparison of the feedback signal and a sinusoidal reference signal. The sinusoidal reference signal is also used to control the low frequency inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.