AC Inverter with constant power output
US4071812A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1976 |
| Grant date | Jan 31, 1978 |
| Priority date | — |
| Expiry date | Mar 1, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A constant voltage square wave inverter drives a load connected as the damping element in an otherwise high Q, resonant matching circuit. The frequency of the inverter is maintained near the resonant frequency of the load circuit to provide substantially constant load power. The frequency of the inverter operation may be maintained near load circuit resonance by forcing commutation of the square wave output voltage as the rate of change of load current is substantially zero. The inverter output voltage may also be commutated as the peak current reaches a predetermined reference value to stabilize inverter operation for loads which cannot accept real power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.