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US 11,959,589 B2Granted
Motor driven pump for variable speed power generation cooling
AssigneeHamilton Sundstrand Corporation
InventorsDhaval S. Patel, Aaron M. Finke, Glenn C. Lemmers, Jr., Andreas C. Koenig
Life of this patent
Estimating the term…
Abstract
An aircraft oil management system includes a generator, pump, and pump control system. The generator is mechanically coupled to a prime mover via a the rotor shaft and is configured to output three-phase power. The pump is mechanically decoupled from the rotor shaft and delivers oil to the generator. The pump control system drives the pump independent of a rotational speed of the rotor shaft.
Claims11
An aircraft oil management system comprising:
- a generator mechanically coupled to a prime mover via a rotor shaft, the generator configured to output a three-phase power;
- a pump mechanically decoupled from the rotor shaft and configured to deliver oil to the generator;
- and
- a pump control system configured to drive the pump independent of a rotational speed of the rotor shaft, the pump control system comprising:
- a motor configured to drive the pump;
- a motor drive module configured to control operation of the motor;
- a motor power supply configured to power one or both of the motor drive module and the motor;
- and
- at least one sensor in signal communication with the motor drive module, the at least one sensor configured to measure an operating condition of the generator and to output a sensor signal indicative of the measured operating condition,
- wherein the motor drive module is configured to store a look-up table (LUT) that indexes at least one operating parameter of the generator to a target oil flow to be input to the generator, and wherein the motor drive module is configured to actively control the pump based on a comparison between the at least one index operating parameter and the measured operating condition indicated by the sensor signal indicative output from the at least one sensor.
7 more elements
A method of controlling an aircraft oil management system, the method comprising:
- outputting three-phase power from a generator that is mechanically coupled to a prime mover via a rotor shaft;
- delivering oil to the generator using a pump that is mechanically decoupled from the rotor shaft;
- driving the pump independent of a rotational speed of the rotor shaft using a pump control system by mechanically coupling the pump to a motor, outputting power from a motor power supply to one or both of the motor and a motor drive module, and controlling operation of the motor using the motor drive module;
- measuring an operating condition of the generator using at least one sensor in signal communication with the motor drive module;
- and
- outputting a sensor signal indicative of the measured operating condition,
- analyzing, via the control system, a look-up table (LUT) that indexes at least one operating parameter of the generator to a target oil flow to be input to the generator;
- comparing at least one index operating parameter and the measured operating condition indicated by the sensor signal indicative output from the at least one sensor;
- and
- actively controlling the pump based on the comparison.
7 more elements
A method of controlling an aircraft oil management system, the method comprising:
- determining an index configured to map generator operating parameters of a generator to target oil flows to be input to the generator;
- storing the index in a motor drive module;
- delivering oil to the generator using a pump that is mechanically decoupled from a rotor shaft;
- outputting, from a sensor, a sensor signal indicative of a measured operating condition of the generator;
- comparing, by the motor drive module, the measured operating condition to at least one operating parameter included in the index;
- and
- based on the comparison, actively controlling the pump independent of a rotational speed of the rotor shaft.
4 more elements
Dependencies are inferred from the claim text.