Analysis of hunting in Synchronous Hysteresis Motor
Name
57205673-MIT.pdf
Description
Full printable version
Size
5.42 MB
Format
Adobe PDF
Checksum (MD5)
93d751710237f787f344e673c5d64de1
Author(s)
Truong, Cang Kim, 1979-
Advisor(s)
Jonathan Cole and James Kirtley.
Alternative Title
Analysis and control of hunting in Synchronous Hysteresis Motor
Date Issued
2004
Publisher
Massachusetts Institute of Technology
Abstract
The Synchronous Hysteresis Motor has an inherent instability when it is used to drive a gyroscope wheel. The motor ideally should spin at a constant angular velocity, but it instead sporadically oscillates about synchronous speed. This phenomenon is known as 'hunting'. This problem produces current ripples at the motor's electrical terminals and induces noise on the sensors that monitor gyro activity. This thesis examines the cause of hunting by deriving the motor's torque characteristics from first principles. It also derives a scheme for suppressing hunting by monitoring the motor's current as an indicator of drag angle and using it to modulate the motor's drive frequency. Explanation of the circuit that successfully implements this scheme is included and lab results are shown to verify the working theory.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (leaf 86).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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