Control of a switched reluctance drive
AssigneeSwitched Reluctance Drives Limited
InventorBarrie Charles Mecrow
Life of this patent
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Abstract
A switched reluctance machine has a stator which has an array of alternate wide and narrow poles around its inner circumference. Coils are wound around the wide poles only. The rotor includes segments of soft magnetic material carried on a non-magnetic core. The segments are so proportioned at the air gap that the flux produced by one stator coil passes through two or more segments and returns through the adjacent narrow poles. The machine is capable of producing a high output.
Claims17
A switched reluctance machine comprising:
- a stator including a plurality of circumferentially arranged stator poles of soft magnetic material;
- a rotor, rotatably mounted with respect to the stator, and having a plurality of circumferentially arranged, magnetically separated rotor segments of soft magnetic material, wherein each said rotor segment is adapted to direct magnetic flux between pairs of adjacent stator poles;
- and
- a plurality of coils provided around alternate stator poles and adapted to carry electric current to generate magnetic flux in said stator poles, wherein each said coil surrounds a single stator pole.
A switched reluctance machine comprising:
- a stator including a plurality of circumferentially arranged stator poles of soft magnetic material;
- a rotor, rotatably mounted with respect to the stator, and having means for directing magnetic flux between pairs of adjacent stator poles;
- and
- means, provided around alternate stator poles, for carrying electric current to generate magnetic flux in said stator poles, wherein said means for carrying surrounds one or more single stator poles.
A method of operating a switched reluctance machine having a stator including a plurality of circumferentially arranged stator poles of magnetic material, a rotor rotatably mounted with respect to the stator, and a plurality of coils provided around alternate stator poles, the method comprising:
- directing magnetic flux between pairs of adjacent stator poles with a plurality of circumferentially arranged, magnetically separated rotor segments of magnetic material;
- and
- carrying electric current to generate magnetic flux in said stator poles using the plurality of coils, each coil surrounding a single stator pole.
Dependencies are inferred from the claim text.