Electrohydraulic servovalve with flow gain compensation
US5285715A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Aug 6, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86622
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electrohydraulic servovalve including a tailoring circuit coupled to provide a predetermined input signal to the motor of the valve. The predetermined signal functions to control the flow of fluid from the valve to effect a desired result. The electrohydraulic servovalve includes a housing defining round flow ports with a spool valve for metering flow through the ports. The spool valve substantially overlaps the round flow ports. The tailoring circuit includes a plurality of amplifiers each of which has a different gain. A command signal is applied to the amplifier and the output from the amplifiers is summed to provide an input signal to the motor of the electrohydraulic servovalve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.