Economical wide range speed control system
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United States of America Patent
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Jun 24, 1997
Grant Date -
N/A
app pub date -
Nov 14, 1994
filing date -
Nov 14, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A speed control system is disclosed wherein a brushless DC motor and a magneto resistive encoder are able to rotate a motor at arbitrarily low speeds. The motor is able to rotate at low speeds by having a filtered signal generated by an encoder applied to its inputs. The encoder is coupled to a series of filters which remove DC level and harmonic distortions from the resulting encoder signal. These filtered signals are then applied to the motor to control motor rotation speed.
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