ELECTRICAL CONTROLLER FOR ENGINE-DRIVEN ELECTRIC MACHINE
First Claim
1. A method, comprising:
- determining, by an electrical controller, a rotational speed of a shaft of an engine coupled to an electric machine, wherein the shaft rotates about an axis of rotation, and wherein an engine controller is configured to control the engine using control techniques configured for a mechanical device having a target moment of inertia around the axis of rotation;
determining, by the electrical controller, a torque for the shaft based on the rotational speed of the shaft; and
controlling, by the electrical controller, the electric machine to apply the torque to the shaft, wherein the electric machine has an actual moment of inertia around the axis of rotation, different from the target moment of inertia.
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Accused Products
Abstract
The disclosure describes a system that includes an engine having a shaft that rotates around an axis of rotation, an engine controller configured to control the engine, an electric machine mechanically coupled to the shaft of the engine, and an electrical controller. The engine controller is configured to control the engine using control techniques configured for a mechanical device having a target moment of inertia around the axis of rotation. The electric machine has an actual moment of inertia around the axis of rotation that is different from the target moment of inertia. To supplement control of the engine due to the difference in moments of inertia, the electrical controller is configured to receive a rotational speed of the shaft, determine a torque for the shaft based on the speed of the shaft, and control the electric machine to apply the torque to the shaft.
5 Citations
20 Claims
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1. A method, comprising:
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determining, by an electrical controller, a rotational speed of a shaft of an engine coupled to an electric machine, wherein the shaft rotates about an axis of rotation, and wherein an engine controller is configured to control the engine using control techniques configured for a mechanical device having a target moment of inertia around the axis of rotation; determining, by the electrical controller, a torque for the shaft based on the rotational speed of the shaft; and controlling, by the electrical controller, the electric machine to apply the torque to the shaft, wherein the electric machine has an actual moment of inertia around the axis of rotation, different from the target moment of inertia. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system, comprising:
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an engine comprising a shaft, wherein the shaft rotates around an axis of rotation; an engine controller configured to control the engine using control techniques configured for a mechanical device having a target moment of inertia around the axis of rotation; an electric machine coupled to the shaft, wherein the electric machine has an actual moment of inertia around the axis of rotation, different from the target moment of inertia; and an electrical controller configured to; receive a rotational speed of the shaft; determine a torque for the shaft based on the speed of the shaft; and control the electric machine to apply the torque to the shaft. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable storage medium storing instructions that, when executed, cause a processor to:
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receive a rotational speed of a shaft of an engine coupled to an electric machine, wherein the shaft rotates about an axis of rotation, and wherein an engine controller is configured to control the engine using control techniques configured for a mechanical device having a target moment of inertia around the axis of rotation; determine a torque for the shaft based on the rotational speed of the shaft; and control the electric machine to apply the torque to the shaft, wherein the electric machine has an actual moment of inertia around the axis of rotation, different from the target moment of inertia.
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Specification