Motor drive voltage-boost control
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United States of America Patent
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Aug 23, 2011
Grant Date -
Oct 30, 2008
app pub date -
Jul 8, 2005
filing date -
Jul 10, 2004
priority date (Note) -
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Abstract
A drive system for a motor having a rotor and a phase winding (a, b, c) comprises; a drive circuit including switch means associated with the winding a, b, c for varying the current passing through the winding; rotor position sensing means arranged to sense the position of the rotor; control means arranged to provide drive signals to control the switch means; a power input for connection to a power supply at a nominal voltage; and boost means in electric communication with the power input and power output, and controllable to boost the nominal voltage to a higher voltage for application to the winding.
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