Motor with rotor supporting windings
First Claim
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1. A motor having an actively alignable rotor comprising a) a rotor;
- and b) a stator, comprising a plurality of conductors supplied with electrical current for rotating said rotor; and
wherein a conductor set comprising some or all of said conductors span less than 180 rotational degrees on the stator; and
c) a rotor position sensor for determining a rotor misalignment; and
d) a control unit for controlling the current supplied to said stator conductors; and
e) a processor connected to said control unit and to an output of said rotor position sensor, for incorporating within a magnetizing torque for each of the conductors of said conductor set a factor that substantially realigns said rotor.
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Abstract
The present invention relates to the use of stator windings of an induction machine to provide both rotation of the rotor and active rotor positioning within the stator frame by modification of the magnetizing current component in the D-Q plane of the rotor applied transformed to the AC waveform current of the stator windings according to an X-Y direction describing a rotor repositioning requirement.
34 Citations
20 Claims
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1. A motor having an actively alignable rotor comprising
a) a rotor; - and
b) a stator, comprising a plurality of conductors supplied with electrical current for rotating said rotor; and
wherein a conductor set comprising some or all of said conductors span less than 180 rotational degrees on the stator; and
c) a rotor position sensor for determining a rotor misalignment; and
d) a control unit for controlling the current supplied to said stator conductors; and
e) a processor connected to said control unit and to an output of said rotor position sensor, for incorporating within a magnetizing torque for each of the conductors of said conductor set a factor that substantially realigns said rotor. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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7-8. -8. (canceled)
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19. An aligning motor comprises a stator and a rotor, wherein said rotor is subjected during operation to a constant force from a first direction, and wherein said stator comprises at least one coil comprising a span of less than 180 rotational degrees, and wherein an imaginary line joining the stator slots containing said at least one coil is substantially normal to said first direction and wherein said at least one coil is wound with a different number of winding turns to the number of winding turns in the other coils to provide a magnetizing torque to aid the rotor in withstanding said constant force.
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20. A motor comprising a rotor and a stator comprising two or more windings for each phase, wherein windings span less than 180 stator degrees and wherein, for some or all of the phases, one of the windings has a greater turn count than another winding of the same phase, and wherein variation in turn count is substantially distributed around the stator and further comprising a sensor for sensing misalignment of said rotor, and a processor for adjusting the phase current to the phases that have a higher turn count in an angular position relative to the rotor capable of influencing the rotor into alignment.
Specification