Voltage control system
US4804923A · kind A · utility
2Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 1987 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P15/003
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for deriving a substantially constant output voltage from an alternating supply voltage of variable frequency and amplitude includes circuit responsive to negative-going zero crossing points of the supply for generating control signals whose duration depends on the number of points occurring in a predetermined time. A switching arrangement is responsive to the signals to interrupt the supply voltage, the interrupted voltage being applied through a transformer to an output circuit from which a d.c. output voltage is applied to spark igniters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.