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US 12,018,703 B2Granted
Hydraulic charging system with electronic power limiting and load balancing
AssigneeQuantum Marine Engineering, Inc.
InventorsKevin Kusiak, Victor Acosta, John Barth, John Allen
Life of this patent
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Abstract
A marine hydraulic system and method of use for reducing cyclic loading of the pump(s) and motor(s) and an amount of accumulator storage required in a hydraulic system. A closed loop logic controller comprising at least one control algorithm for each pump/motor pair utilized in a single hydraulic system is utilized to reduce load fluctuations on the motors, allow the use of common pressure compensated, variable displacement (VDH) pumps, reduce the number and/or volume of system accumulators and equalize wear throughout the system.
Claims28
A hydraulic charging system comprising:
- at least one power source;
- at least one electric motor;
- at least one current sensor;
- at least one variable displacement hydraulic (VDH) pump;
- at least one pressure control valve;
- at least one hydraulic fluid accumulator;
- a pressure sensor;
- and
- a closed loop logic controller comprising multiple control algorithms;
- wherein the at least one power source provides power to the at least one electric motor, the at least one electric motor drives at least one VDH pump, the at least one current sensor monitors a load draw of the at least one electric motor during operation, and the at least one VDH Pump;
- pressurizes a hydraulic fluid until it reaches a setpoint of the at least one pressure control valve, and
- charges the at least one hydraulic accumulator;
- wherein a system hydraulic fluid pressure is monitored by the pressure sensor,
- wherein the at least one current sensor and the pressure sensor provide feedback readings to the closed loop logic controller, and
- wherein the closed loop logic controller processes load readings from the at least one current sensor and pressure readings from the pressure sensor using the multiple control algorithms to generate commands to the at least one pressure control valve to maintain a constant desired load condition of the at least one VDH pump and therefore the load of the at least one electric motor.
12 more elements
A hydraulic charging system comprising:
- two or more power sources;
- two or more electric motors;
- two or more current sensors;
- two or more variable displacement hydraulic (VDH) pump;
- two or more pressure control valves;
- at least one hydraulic fluid accumulator;
- a pressure sensor;
- and
- a closed loop logic controller comprising multiple control algorithms to balance a loading of two or more electric motors;
- wherein the two or more power sources provide power to the two or more electric motors,
- wherein the two or more electric motors drive the two or more VDH pumps, the two or more current sensors monitor the load draw of the two or more motors during operation, and
- the two or more VDH Pumps;
- pressurize a hydraulic fluid until it reaches a setpoint of each of the two or more pressure control valves, and
- charges the at least one hydraulic accumulator;
- wherein a system hydraulic fluid pressure is monitored by the pressure sensor,
- wherein the two or more current sensors and the pressure sensor provide feedback readings to the closed loop logic controller, and
- wherein the multiple control algorithms of the closed loop logic controller processes readings from the two or more current sensor and the reading from the pressure sensor to generate commands to the two or more pressure control valves to maintain desired constant loading conditions of the two or more VDH pumps and constant loading conditions the two or more electric motors.
14 more elements
A method of reducing cyclic loading in a hydraulic system comprising:
- providing at least one electric motor;
- providing at least one current sensor;
- providing at least one pressure compensated, at least one variable displacement hydraulic (VDH) pump;
- providing at least one pressure control valve;
- providing at least one hydraulic fluid accumulator;
- providing a pressure sensor;
- and
- providing a closed loop logic controller comprising multiple control algorithms;
- wherein the at least one power source provides power to the at least one electric motor to drive the at least one VDH pump, which charges the hydraulic accumulator and pressurize a hydraulic fluid until it reaches a setpoint of the at least one electronic pressure control valve,
- wherein the at least one current sensor monitors the load draw of the at least one motor during operation and a system hydraulic fluid pressure is monitored by the pressure sensor,
- wherein the at least one current sensor and the pressure sensor provide feedback readings to the multiple algorithms of the closed loop logic controller, and the multiple algorithms of the closed loop logic controller process the at least one current sensor reading and the pressure sensor reading in order to generate commands to the at least one pressure control valve to reduce cyclic load spikes in loading conditions of the at least one VDH pump and the at least one electric motor.
8 more elements
Dependencies are inferred from the claim text.