Back to results
US 11,619,956 B2Granted
Nonlinear trim head power supply with a wide input range and a high efficiency
AssigneeHamilton Sundstrand Corporation
InventorsDaniel Knope, Adrian E. Vandergrift, Francisco X. Romo
Life of this patent
Estimating the term…
Abstract
A trim head drive is provided. The trim head drive includes a nonlinear power supply. The nonlinear power supply includes an output and a return connected to a trim coil of a generator. An output of the nonlinear power supply directly drives a trim coil to control an output frequency of the generator. The nonlinear power supply varies the output positively and negatively to either sink or source a trim head current to control an output frequency of the generator.
Claims17
A trim head drive comprising:
- a nonlinear power supply comprising an output and a return connected to a trim coil of a generator;
- and
- a controller configured to receive a feedback signal based on operation of the generator, the controller in signal communication with a permanent magnet generator and an exciter field, and in signal communication with the trim coil separately from the permanent magnet generator and an exciter field,
- wherein the controller rectifies an alternating current (AC) voltage received from the permanent magnet generator to generate a direct current (DC) voltage, and outputs the DC voltage to the exciter field;
- wherein an output current of the nonlinear power supply directly drives the trim coil to control an output frequency of the generator, and
- wherein the nonlinear power supply includes a switching regulator, and
- wherein the controller monitors the output frequency of the generator indicated by the feedback signal and varies the output current positively and negatively to either sink or source a trim head current to control the output frequency of the generator.
4 more elements
A method comprising:
- generating, by a nonlinear power supply of a trim head drive that includes a switching regulator and an output and a return that are connected to a trim coil, an output current to drive the trim coil via the output;
- receiving, by a controller included in the trim head drive, a feedback signal indicative of a frequency from and sensed by a frequency sense of the generator,
- rectifying, by the controller, an alternating current (AC) voltage received from the permanent magnet generator to generate a direct current (DC) voltage;
- and
- outputting, from the controller, the DC voltage to the exciter field;
- wherein the output current of the nonlinear power supply directly drives the trim coil to control the frequency of the generator, and
- wherein the controller monitors the frequency of the generator indicated by the feedback signal and the nonlinear power supply varies the output current positively and negatively to either sink or source the trim head current to control an output frequency of the generator.
4 more elements
Dependencies are inferred from the claim text.