WIRELESSLY TRANSFERRING POWER WITHIN AN ELECTRIC MACHINE HAVING AC AND DC ROTOR COILS
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United States of America Patent
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Issued Date -
Jun 6, 2024
app pub date -
Mar 4, 2022
filing date -
Mar 5, 2021
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Abstract
A stator defines multiple stator poles with associated stator windings. A rotor defines multiple fixed rotor poles with associated teeth with a ferromagnetic material. The fixed rotor poles have associated rotor windings configured to be energized substantially by the stator. Each of the rotor windings is associated with the tooth. Each of the rotor windings includes an alternating current (AC) coil (or auxiliary coil) configured to carry an AC current induced by an AC current flowing in the stator. A direct current (DC) coil (or primary coil) defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative forces between the rotor and the stator. The DC coil is at least partially powered or controlled by the AC coil.
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