Method and apparatus for correcting hysteresis synchronous motor hunting
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United States of America Patent
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Aug 10, 1993
Grant Date -
N/A
app pub date -
Mar 2, 1992
filing date -
Mar 2, 1992
priority date (Note) -
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Abstract
A method and apparatus for accurately controlling a hysteresis synchronous motor velocity eliminate low frequency hunting, which is characteristic of the motor. A nominal input phase current is modified by providing feedback information, thereby enabling a microprocessor control system to modify the phase of quadrature input current signal to the motor and thereby eliminating hunting of the motor. Accordingly, in a high resolution scanning application, speed variations which could cause disturbing artifacts to appear in an output image are eliminated. Velocity control, better than 15 parts per million, can be achieved
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