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Title:
PRESSURE CONTROL IN A DEAD-HEADED HYDRAULIC SYSTEM USING PUMP MOTION CONTROL
Document Type and Number:
WIPO Patent Application WO/2018/207157
Kind Code:
A3
Abstract:
A method for controlling pressure and flow of hydraulic fluid through a hydraulic control unit comprises receiving a pressure command from an electronic control unit. The received pressure command is processed to generate a pressure- based torque command and to generate one of a shaft angle-based torque command or a volume-based torque command. The generated pressure-based torque command and the generated one of the shaft angle-based torque command or the volume-based torque command are processed to further generate a duty cycle for a field oriented controlled motor. Motor phase wires of the field oriented controlled motor are modulated according to the generated duty cycle to operate a bidirectional positive displacement pump connected to the field oriented controlled motor. The flow rate and pressure of fluid supplied by the bidirectional positive displacement pump are adjusted by updating the generated duty cycle.

Inventors:
BUSDIECKER MATTHEW R (US)
Application Number:
PCT/IB2018/053320
Publication Date:
January 03, 2019
Filing Date:
May 11, 2018
Export Citation:
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Assignee:
EATON INTELLIGENT POWER LTD (IE)
International Classes:
H02P21/00; F04B17/03; F04B49/06; F16D31/00; F16D48/06
Domestic Patent References:
WO2014206339A12014-12-31
Foreign References:
US9597940B22017-03-21
DE102015204383A12016-09-15
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