Electricity: motive power systems – Synchronous motor systems – Hysteresis or reluctance motor systems
Reexamination Certificate
2005-03-29
2005-03-29
Fletcher, Marlon T. (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Hysteresis or reluctance motor systems
C318S704000, C318S716000
Reexamination Certificate
active
06873130
ABSTRACT:
The invention provides a method and apparatus for maintaining the force, or torque, delivered by a variable reluctance motor as the speed of the motor increases. The method comprises the steps of sensing the speed of the motor and varying the number of turns of the motor's phase coil based on the sensed speed. The apparatus includes a motor speed sensor for sensing the speed of the motor and an inductance switch for switching the number of turns of the phase coil from a first value to a second value based on the sensed speed. One embodiment of the invention includes an inductance compensation circuit to compensate for the change in load inductance when the number of turns of the phase coil is switched.
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Janisiewicz Stan
Weiss Darrin M.
Zalesski Andrew
Banner & Witcoff , Ltd.
Delaware Capital Formation
Fletcher Marlon T.
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