Synchronous reluctance machine controller
First Claim
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1. 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.
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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.
12 Citations
2 Claims
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1. An energy conversion system comprising:
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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.
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2. An energy conversion system comprising:
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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.
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Specification
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Current AssigneeBeaver Aerospace And Defense, Inc.
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Original AssigneePentadyne Power Corporation (Phillips Service Industries, Inc.)
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InventorsKalev, Claude Michael
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Primary Examiner(s)Ro; Bentsu
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Application NumberUS11/616,789Publication NumberTime in Patent Office1,273 DaysField of Search318/376, 318430-434, 318/150, 318/700, 318/701US Class Current318/376CPC Class CodesH02P 25/08 Reluctance motorsH02P 9/00 Arrangements for controllin...
