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US 5,225,729 AGranted
Lap-wound stator with adjustable commutating angle
OwnerTai-Her Yanginventor
Life of this patent
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Abstract
A stator winding for a motor comprising main, left and right poles wound by a main winding and auxiliary winding(s) which enable relatively continuous commutation angle adjustment by imparting different excitation currents upon the different windings. The auxiliary windings accommodate load variations in all types of motors. In addition, circuitry is disclosed for incorporating the auxiliary windings in a bi-directional motor for facilitating reversal of rotation.
Claims3
A reversing motor assembly, comprising:
- a pair of terminals for connecting a power supply;
- a commutated motor, said motor further comprising,
- a rotor,
- commutating means for distributing power from said power supply to said rotor, said commutating means further comprising a first contactor and a second contactor, said first contactor and second contactor maintaining electrical contact with said rotor,
- a stator having a plurality of stator teeth projecting inward form around a cylindrical periphery, said stator teeth being sequentially arranged in sets around said periphery, wherein each set comprises a main stator tooth and a pair of flanking auxiliary stator teeth,
- a plurality of stator winding connected in series between said power terminals, said stator windings including a main winding wound around a collective set of said stator teeth, and a plurality of auxiliary windings each wound around a collective subset of said stator teeth for creating a composite magnetic field having a pole center which may be adjusted by varying a proportional magnitude of excitation current in said main and auxiliary windings, said plurality of auxiliary windings including a first auxiliary winding wound around said main stator tooth and one of said auxiliary stator teeth for adjusting said composite pole in one direction, and a second auxiliary winding wound around said main stator tooth and another of said auxiliary stator teeth for adjusting said composite pole in another direction;
- and
- a double-pole double-throw reversing switch having a first pair of throw contacts parallely connected to said main winding and a first pole connected to said first contactor, and a second pair of throw contacts parallely connected across said set of windings and a second pole connected to said second contactor,
- wherein said reversing switch may be placed in one of a first and a second position, said first position creating a composite magnetic pole having a pole center for driving said rotor in a clockwise direction, and said second position creating a composite magnetic pole having a pole center for driving said rotor in a counter-clockwise direction.
6 more elements
A motor stator, comprising;
- a plurality of stator teeth projecting inward from around a cylindrical periphery, said stator teeth being sequentially arranged in sets around said periphery, wherein each set comprises a main stator tooth and a pair of flanking auxiliary stator teeth;
- a main winding wound around a collective set of said stator teeth;
- and
- a plurality of auxiliary windings each wound around a collective subset of said stator teeth for creating a composite magnetic field having a pole center which may be adjusted by varying a proportional magnitude of excitation current in said main and auxiliary windings, said plurality of auxiliary windings including a first auxiliary winding wound around said main stator tooth and one of said auxiliary stator teeth for adjusting said composite pole in one direction, and a second auxiliary winding wound around said main stator tooth and another of said auxiliary stator teeth for adjusting said composite pole in another direction.
1 more element
A motor stator, comprising;
- a plurality of stator teeth projecting inward from around a cylindrical periphery, said stator teeth being sequentially arranged in sets around said periphery, wherein each set comprises a main stator tooth and a pair of flanking auxiliary stator teeth;
- a main winding wound around a collective set of said stator teeth;
- and
- a plurality of auxiliary windings each wound around a collective subset of said stator teeth for creating a composite magnetic field having a pole center which may be adjusted by varying a proportional magnitude of excitation current in said main and auxiliary windings, said plurality of auxiliary windings including a first auxiliary winding wound around said main stator tooth and one of said auxiliary stator teeth for adjusting said composite pole center in one direction, a second auxiliary winding wound around said main stator tooth and another of said auxiliary stator teeth for adjusting said composite pole center in another direction, and a third auxiliary winding wound around said main pole.
1 more element
Dependencies are inferred from the claim text.