Control of switched reluctance machines
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United States of America Patent
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Sep 20, 2011
Grant Date -
Sep 3, 2009
app pub date -
Nov 1, 2006
filing date -
Nov 3, 2005
priority date (Note) -
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Abstract
A flux switching electric motor (102) is disclosed. The motor comprises a rotor (104), a stator (106), field windings (124, 126) and armature windings (128, 130). #A microcontroller (134) controls supply of electrical current to the field and armature windings. A rotor position sensor includes a divider for (i) receiving an input signal dependent upon the rate of change of current in at least one field winding, (ii) receiving an input signal dependent upon the voltage across at least one armature winding, current through which causes at least part of the current in the field winding, and (iii) providing the microcontroller (134) with a control signal which is dependent upon the ratio of the input signals received by the divider.
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