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US 7,741,795 B2Granted
Synchronous reluctance machine controller
AssigneePentadyne Power Corporation
InventorClaude Michael Kalev
Life of this patent
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Abstract
The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.
Claims2
An energy conversion system comprising:
- a bi-directional AC-to-DC electric power converter;
- the converter electrically interconnecting and bi-directionally exchanging electric power between a variable speed synchronous reluctance motor-generator and a DC bus;
- the motor-generator bi-directionally exchanging mechanical power with a flywheel;
- the power exchange being controlled by a plurality of current controllers;
- the current controllers operably coupled to the converter;
- the current controllers including a feedforward controller and a feedback controller;
- a synchronous reluctance motor-generator machine dynamics predictor utilized by the feedforward controller;
- and,
- wherein the predictor includes an input variable estimating an air-gap flux.
6 more elements
An energy conversion system comprising:
- a bi-directional AC-to-DC electric power converter;
- the converter electrically interconnecting and bi-directionally exchanging electric power between a variable speed synchronous reluctance motor-generator and a DC bus;
- the motor-generator bi-directionally exchanging mechanical power with a flywheel;
- the power exchange being controlled by at least one current controller operably connected to the converter;
- a feedback controller operable for regulating the DC bus voltage;
- the feedback controller incorporating a feedforward term for the DC bus current;
- a synchronous reluctance motor-generator machine dynamics predictor utilized by the feedforward controller;
- and,
- wherein the predictor includes an input variable estimating an air-gap flux.
6 more elements
Dependencies are inferred from the claim text.