Pulse-width-modulation control of parallel three-way valves to supply single-acting quick-response actuator
US4813339A · kind A · utility
23Cited by
23References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1985 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Nov 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S91/01
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Parallel, pulse-width-modulation controlled three-way valves each both supply and exhaust a pressure chamber of a fluid actuator. The phase difference of the oscillator carrier waves of the pulse width modulation input circuit effectively increases the frequency of a net actuator carrier wave so as to quicken the response of the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.