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US 2017/0324308 A1Published application
Driver circuit for electric motors
AssigneeArm Limited
InventorDavid Victor Pietromonaco
Life of this patent
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Abstract
A method and a device for engendering rotation of a rotor relative to a stator. Stator teeth may comprise a mutually coupled coil winding pair, and a driver circuit may drive current through a first coil winding of the mutually coupled coil winding pair to generate a current on a second coil winding of the mutually coupled coil winding pair. The driver circuit may drive charge through the second coil winding to apply a torque to a rotor tooth. The driver circuit may also recapture and store charge to drive through the second coil winding.
Claims27
An apparatus comprising:
- a first circuit and a second circuit arranged such that:
- the second circuit is to be coupled to a second coil winding and to drive a first current through the to be coupled second coil winding;
- and
- the first circuit is to generate a first magnetic field in response to a second current in a first coil winding, and the first magnetic field is to generate a third current in the second coil winding constructively combining with the first current to provide a combined current in the second coil winding;
- wherein the combined current is to induce a magnetic force against one or more rotor teeth to apply a torque relative to a stator tooth.
2 more elements
A method comprising:
- driving a first current through a second coil winding of a stator tooth;
- driving a second current through a first coil winding of the stator tooth, the second current inducing a third current in the second coil winding constructively combining with the first current to provide a combined current in the second coil winding,
- wherein the combined current induces a magnetic force against one or more rotor teeth to apply a torque.
An electric motor comprising:
- a rotor comprising a plurality of rotor teeth;
- a stator comprising a plurality of stator teeth;
- mutually coupled first and second coil windings wound about at least one of the plurality of stator teeth;
- and
- a driver circuit coupled to the mutually coupled first and second coil windings and comprising a plurality of charge storage devices, the driver circuit to:
- drive a first current on the first coil winding responsive to which a second current is induced on the second coil winding;
- and
- use electrical resonance between the plurality of charge storage devices and the second coil winding to engender an oscillating magnetic field to interact with one or more of the plurality of rotor teeth, the oscillating magnetic field based, at least in part, on the generated second current.
5 more elements
Dependencies are inferred from the claim text.