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US 6,583,995 B2Granted
Permanent magnet generator and generator control
AssigneeHoneywell International Inc.
InventorsGabor Kalman, Colin Huggett
Life of this patent
Estimating the term…
Abstract
A system includes a permanent magnet generator, a dc link, an inverter coupled between the generator and the dc link, and a control for the inverter. The control regulates dc link voltage by adjusting the load angle and voltage magnitude of inverter ac terminal voltage with respect to emf of the machine.
Claims21
A system comprising:
- a permanent magnet machine;
- a dc link;
- and
- a control for regulating dc link voltage, the control including an inverter having ac terminals coupled to the machine, the control adjusting load angle and magnitude of inverter ac terminal voltage with respect to emf of the machine.
1 more element
A system comprising:
- a permanent magnet machine including stator windings and a rotor, rated current of the windings being at least equal to current flowing through the windings during short circuit conditions;
- a dc link;
- and
- means for regulating dc link voltage by adjusting load angle and voltage magnitude of inverter ac terminal voltage with respect to emf of the machine.
1 more element
Apparatus for a permanent magnet machine, the apparatus comprising:
- an inverter;
- and
- an inverter control for regulating dc link voltage by determining load angle with respect to emf of the machine, determining magnitude of current flowing through the stator windings, and using the load angle and the determined current magnitude to modulate the inverter.
A method of using an inverter to provide power on a dc link, the inverter receiving power from an ac generator, the method comprising:
- determining a load angle from measured and commanded dc link voltage;
- generating a vector-based current command from the load angle, the current command being synchronous with respect to the machine emf;
- generating a feedback current vector of ac generator current, the feedback current vector being synchronous with respect to the machine emf;
- generating a voltage command from the current command and the feedback current vector;
- and
- using the voltage command to modulate the inverter.
3 more elements
A system comprising:
- a permanent magnet machine;
- a dc link;
- and
- a control for regulating dc link voltage, the control including an inverter having ac terminals coupled to the machine, the control adjusting load angle and magnitude of inverter ac terminal voltage with respect to emf of the machine;
- the control further including a current loop for eliminating dc current in the inverter.
2 more elements
Dependencies are inferred from the claim text.