Starting Apparatus for a Direct Current Brushless Motor and Method Thereof
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United States of America Patent
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Issued Date -
Jul 9, 2009
app pub date -
Jan 2, 2009
filing date -
Jan 8, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A starting apparatus for a direct current (DC) brushless motor and a method thereof are provided. The DC brushless motor comprises a plurality of windings presenting a joint connection via a common connection. The starting apparatus provides current to two of the three windings and rotates the DC brushless motor to obtain a Back Electro-Motive Force (BEMF) from the floating winding. Then, the starting apparatus provides a current to another two windings to operate the motor according to the variation of BEMF induced by the swing of the motor when it rotates to a static equilibrium point.
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