- Patent Title: Method of increasing electro-hydrostatic actuator piston velocity
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Application No.: US14786368Application Date: 2014-04-22
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Publication No.: US10309429B2Publication Date: 2019-06-04
- Inventor: Ralf Gomm , Bjorn Eriksson
- Applicant: Parker-Hannifin Corporation
- Applicant Address: US OH Cleveland
- Assignee: Parker Hannifin Corporation
- Current Assignee: Parker Hannifin Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Renner, Otto, Boisselle & Sklar, LLP
- International Application: PCT/US2014/034980 WO 20140422
- International Announcement: WO2014/176252 WO 20141030
- Main IPC: F15B11/08
- IPC: F15B11/08 ; F15B13/044 ; F15B7/00

Abstract:
Provided is a system and method to generate and control hydraulic fluid flow that exceeds the fluid flow capacity of an electrically driven pump to achieve high actuator retraction/extension speeds and/or electrical flow capacity of an electrical storage system to better control electrical storage. Electric machines and hydraulic pumps generally have a maximum speed beyond which they cannot be operated at. Further, electrical storage systems typically have storage capacities and rates beyond which they cannot be operated at. While an alternate approach could be to increase the hydraulic pump displacement, thus lowering the required electric machine and pump speed to generate a certain flow, it is typically desirable to reduce pump displacement in order to reduce required electric machine torque and minimize component size and losses.
Public/Granted literature
- US20160076558A1 METHOD OF INCREASING ELECTRO-HYDROSTATIC ACTUATOR PISTON VELOCITY Public/Granted day:2016-03-17
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