Abstract: A controller for a switched reluctance machine (SRM) generates current commands that reduce torque harmonics generated by the SRM. The controller monitors the phase currents and rotor position of the SRM to estimate torque generated by the SRM. The current command signal is modified based on the difference between the torque command and the estimated torque. A multiplier that varies with the monitored torque command is applied to the modified current command to provide a smooth phase-to-phase transition.

Abstract: A permanent magnet machine (PMM) comprises: a generally cylindrical permanent magnet (PM) rotor that comprises multiple PM rotor poles arranged around a rotor axis of rotation; and a stator with two generally cylindrical and concentric yokes, an inner yoke proximate the PM rotor with associated multiple inner poles and inner armature windings suitable for multiphase alternating current operation that form a PMM magnetic flux circuit, an outer yoke with associated multiple outer poles and outer control windings suitable for connection to a direct current source, with distal ends of the outer poles in contact with the inner yoke to form an external magnetic flux circuit that diverts magnetic flux from the PMM magnetic flux circuit; wherein application of increasing direct current to the outer windings results in increased magnetic reluctance of the external magnetic flux circuit, thereby causing the external magnetic flux circuit to divert less magnetic flux from the PMM magnetic flux circuit.

Abstract: A power conversion system comprises: a source of multiphase high frequency alternating current (AC) electrical input power; a high frequency controlled magnetics transformer for each phase of the multiphase high frequency AC input power, with each transformer having a primary winding coupled to its respective phase of the multiphase high frequency AC input power, at least one secondary winding that produces high frequency AC output power and at least one control winding responsive to a direct current (DC) control signal that changes the high frequency output power in proportion to the amplitude of the DC control signal; a power converter that receives the multiphase high frequency AC output power from each high frequency transformer secondary and converts it to system output power without the high frequency AC content; and a system controller responsive to the system output power that produces a DC control signal for each control winding that changes in amplitude in response to changes in a measured parameter

Abstract: A controller for a switched reluctance machine (SRM) generates current commands that reduce torque harmonics generated by the SRM. The controller monitors the phase currents and rotor position of the SRM to estimate torque generated by the SRM. The current command signal is modified based on the difference between the torque command and the estimated torque. A multiplier that varies with the monitored torque command is applied to the modified current command to provide a smooth phase-to-phase transition.

Abstract: A power conversion system comprises: a source of multiphase high frequency alternating current (AC) electrical input power; a high frequency controlled magnetics transformer for each phase of the multiphase high frequency AC input power, with each transformer having a primary winding coupled to its respective phase of the multiphase high frequency AC input power, at least one secondary winding that produces high frequency AC output power and at least one control winding responsive to a direct current (DC) control signal that changes the high frequency output power in proportion to the amplitude of the DC control signal; a power converter that receives the multiphase high frequency AC output power from each high frequency transformer secondary and converts it to system output power without the high frequency AC content; and a system controller responsive to the system output power that produces a DC control signal for each control winding that changes in amplitude in response to changes in a measured parameter