A method and apparatus for controlling an electric motor. A flow of an alternating current through stator coils in the electric motor is controlled based on a position of a rotor in the electric motor such that a repulsive force between a rotor and a stator coil in the stator coils occurs when the alternating current flows through the stator coil.

Disclosed herein is a design for flux switching machines with one or more armature windings which can deliver controlled torque, in either selected direction on start up, without the use of a mechanical position sensor. Flux switching machines without sensors can operate equally well in either direction. The invention discloses design features for such machines which improves the torque profile of the motor with angle. In three phase machines this delivers higher torque and lower ripple torque. In single phase flux switching machines the invention allows the rotor to be placed in a position where maximum torque can be delivered in either direction by selection of either positive or negative armature current. Rotor slotting is introduced to create a path of low permeability across a rotor tooth with minimal impact on the normal torque producing flux paths. Asymmetry of stator slots is used to further create a stable rotor position when energized by predominantly field means or armature means. Starting of the rotor from this stable position can be achieved in either direction. The method is suitable for starting permanent magnet flux switching motors. The invention results in low cost single phase motors which can start and run in either direction and three phase flux switching motors with improved performance over the prior art.

This rotating electrical machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.

This rotating electrical machine has a rotor, stator core, field windings for multiple poles, and armature windings for the multiple poles. The rotor is rotatably supported about a shaft. Convex-shaped multiple salient pole sections are formed on the outer circumference of the rotor while arranged in the circumferential direction. The stator core is provided along the outer circumference of the rotor with an air gap from the rotor. Convex-shaped multiple teeth are formed on the inner circumference of the stator core while arranged in the circumferential direction. The field windings for the multiple poles are wound around each of the multiple teeth while insulated from the field windings.

An electric vehicle includes a system performing a method of charging a battery of the electric vehicle. The system includes an electrical motor having a rotor and a plurality of windings. The vehicle is turned off to allow the rotor to come to rest at an initial rotor position. The processor controls a current through the motor to rotate the rotor to locate a boundary of an electrical lash region associated with the rotor, determines a selected winding of the plurality of windings having a phase vector located close to the electrical lash region, deactivates the selected winding, controls flow of a first current through the motor with the selected winding deactivated to rotate the rotor towards a direction of the selected winding, and controls flow of a second current from a charging station to the battery through the electric motor with the rotor rotated towards the selected winding.

A synchronous reluctance motor includes magnetic barriers in each magnetic barrier group of a rotor core, each having a shape which protrudes toward a radial inner side and is symmetrical about a q-axis. A portion closer to a circumferential side than the q-axis includes a first portion extending perpendicular to the q-axis and a second portion extending farther toward the circumferential side from a circumferential side of the first portion and radially outward, and the first portions of the magnetic barriers in each magnetic barrier group have the same radial dimension. The first portions of the magnetic barriers other than the radial outermost magnetic barrier have the same circumferential dimension, which is the same as or twice a circumferential dimension of the first portion of the radial outermost magnetic barrier.

A synchronous reluctance motor includes magnetic barriers in each magnetic barrier group of a rotor core, each having a shape which protrudes toward a radial inner side and is symmetrical about a q-axis. A portion closer to a circumferential side than the q-axis includes a first portion extending perpendicular to the q-axis and a second portion extending farther toward the circumferential side from a circumferential side of the first portion and radially outward, and the first portions of the magnetic barriers in each magnetic barrier group have the same radial dimension. The first portions of the magnetic barriers other than the radial outermost magnetic barrier have the same circumferential dimension, which is the same as or twice a circumferential dimension of the first portion of the radial outermost magnetic barrier.

The present disclosure relates to a switched reluctance motor including permanent magnets. More particularly, it relates to a switched reluctance motor including a plurality of permanent magnets, where permanent magnets [stator-PMs] and coil windings are arranged in a stator. The coil windings use an alternate teeth winding configuration, and the magnetic flux directions of the coil windings and the permanent magnets are opposite. Magnetic flux path guides are included such that, when no current flows, the magnetic flux of the permanent magnets circulates only within the stator, minimizing flux through the air gap and suppressing cogging torque. When current is applied, the N-pole flux induced by the windings repels the N-pole flux of the permanent magnets, forcing the flux into the air gap. There, the fluxes combine, increasing electromagnetic force and torque, while improving efficiency and suppressing cogging torque and induced voltage despite the presence of the permanent magnets.

The present disclosure relates to a switched reluctance motor including permanent magnets. More particularly, it relates to a switched reluctance motor including a plurality of permanent magnets, where permanent magnets [stator-PMs] and coil windings are arranged in a stator. The coil windings use an alternate teeth winding configuration, and the magnetic flux directions of the coil windings and the permanent magnets are opposite. Magnetic flux path guides are included such that, when no current flows, the magnetic flux of the permanent magnets circulates only within the stator, minimizing flux through the air gap and suppressing cogging torque. When current is applied, the N-pole flux induced by the windings repels the N-pole flux of the permanent magnets, forcing the flux into the air gap. There, the fluxes combine, increasing electromagnetic force and torque, while improving efficiency and suppressing cogging torque and induced voltage despite the presence of the permanent magnets.