Abstract: A brushless, self-excited synchronous field winding machine is presented. The AC stator is configured with four or more phases to produce independent magnetic fields at different spatial harmonics. Windings in the rotor are configured to magnetically couple to the different spatial harmonics produced by the AC stator. More specifically, an oscillating field generated by the stator magnetically couples to the excitation winding on the rotor. This induces an AC voltage which results in current flowing through the field winding of the rotor. The magnitude of the field current is therefore controlled by the magnitude of the oscillating field. The AC stator also produces a magnetic field at a different spatial harmonic which magnetically couples to field winding of the rotor. This component will interact with the field current to produce torque. With this approach, the power density of the electric machine is significantly increased as compared to conventional field winding designs.

Abstract: A brushless, self-excited synchronous field winding machine is presented. The AC stator is configured with four or more phases to produce independent magnetic fields at different spatial harmonics. Windings in the rotor are configured to magnetically couple to the different spatial harmonics produced by the AC stator. More specifically, an oscillating field generated by the stator magnetically couples to the excitation winding on the rotor. This induces an AC voltage which results in current flowing through the field winding of the rotor. The magnitude of the field current is therefore controlled by the magnitude of the oscillating field. The AC stator also produces a magnetic field at a different spatial harmonic which magnetically couples to field winding of the rotor. This component will interact with the field current to produce torque. With this approach, the power density of the electric machine is significantly increased as compared to conventional field winding designs.

Abstract: An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationary inner stator having stator windings.

Abstract: An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationery inner stator having stator windings.

Abstract: A motor-generator utilizes a multi-part rotor encircling a stator, the rotor including a plurality of rotor segments.

Abstract: An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationery inner stator having stator windings.

Abstract: An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationery inner stator having stator windings.

Abstract: A motor-generator utilizes a multi-part rotor encircling a stator, the rotor including a plurality of rotor segments.

Abstract: A motor-generator utilizes a multi-part rotor encircling a stator, the rotor including a plurality of rotor segments.

Abstract: An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationery inner stator having stator windings.

Abstract: An electromechanical flywheel machine includes a flywheel mass and a motor-generator having a rotor rotatable about a stationery inner stator having stator windings.

Abstract: A motor-generator utilizes a multi-part rotor encircling a stator, the rotor including a plurality of rotor segments.

Abstract: A flywheel power supply includes a motor-generator having a polyphase stator.

Abstract: A flywheel power supply includes a motor-generator having a polyphase stator.

Abstract: A flywheel power supply includes a motor-generator having a polyphase stator.

Abstract: A flywheel power supply includes a motor-generator having a polyphase stator.

Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.

Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.

Abstract: The present invention provides an electro-mechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.

Abstract: The present invention provides an electromechanical energy exchange system with a variable speed synchronous reluctance motor-generator having an all-metal rotor. A bi-directional AC-to-DC electric power converter interconnects the motor-generator with a DC bus. First and second hybrid controllers provide current regulation for the motor-generator and voltage regulation for the DC bus. Use of both feedback and feedforward control elements provides a controller particularly suited for operating high speed devices.