Velocity-pressure control apparatus of hydraulic machine
US8051653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2008 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Jun 21, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A velocity-pressure control apparatus of a hydraulic machine includes a pressure command generator, a pressure sensor, a pressure controller, a velocity command generator, a velocity limiter, a switch, a comparator, a velocity sensor, and a motor driver. The pressure controller receives a pressure compensation signal composed by the pressure command generator and the pressure sensor. The velocity limiter receives a compensation velocity signal from the pressure controller and a predetermined velocity signal from the velocity command generator and outputs a corresponding limiting velocity command signal to the switch. The comparator controls the velocity-pressure control apparatus to work at a velocity control mode when the pressure compensation signal is a positive signal or a null signal, and controls the velocity-pressure control apparatus to work at a master pressure control and slave velocity control mode when the pressure compensation signal is a negative signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.