Method and apparatus for driving capacitive-type load
US4767959A · kind A · utility
50Cited by
7References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 9, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Sep 9, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/21
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for driving a capacitive-type load using a direct current power source, a charging circuit connected in series to the load, a discharging circuit connected in parallel to the load, and an electric circuit for controlling the charging and discharging circuits, and wherein at least one of the charging and discharging circuits has a primary coil, and a secondary coil coupled to the primary coil restores energy, generated when the charging or discharging is turned OFF, to the power source. This provides a highly efficient driving by a restoration of energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.