Apparatus for driving a brushless DC motor
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United States of America Patent
Stats
-
Apr 19, 1994
Issued Date -
N/A
app pub date -
Dec 24, 1992
filing date -
Jun 5, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A brushless dc motor has polyphase stator windings and a rotor. The polyphase stator windings have first ends and second ends. The first ends are connected in common at a common junction. Two of the second ends are sequentially selected and a drive current is supplied between the selected two second ends to rotate the rotor. The rotor has magnetic poles arranged in a predetermined configuration. A voltage at the common junction is measured. A rotation of the rotor is controlled in response to the measured common-junction voltage.
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