Motor controlling device
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United States of America Patent
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-
Apr 16, 2013
Grant Date -
Jul 21, 2011
app pub date -
Jan 10, 2011
filing date -
Jan 20, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor controlling device includes an encoder to output pulse signals with a predetermined angle interval as a rotor of a motor is rotated. An energized phase of the motor is sequentially switched by detecting a rotation position of the rotor based on a value of counting the signals. An initial drive controlling portion executes an initial drive to switch the energized phase with a predetermined pattern after the device is activated so as to learn a relationship among the count value, the rotation position and the energized phase. An initial drive prohibiting portion prohibits the execution of the initial drive until a predetermined time is elapsed after the initial drive is finished.
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