Abstract: An electric machine includes a stator having a plurality of stator teeth. Each stator tooth of the plurality of stator teeth includes a winding disposed there around. Each stator tooth of the plurality of stator teeth is shaped to receive a plurality of microchannels. The microchannels contain a circulating heat-transfer fluid; Each stator tooth of the plurality of stator teeth is thermally exposed to the heat-transfer fluid via the plurality of microchannels so as to effectuate heat removal from each stator tooth of the plurality of stator teeth.

Abstract: Aspects of the disclosure relate to a cycloidal magnetic gear. The cycloidal magnetic gear includes an outer rotor. A plurality of magnetic pole pairs is disposed on an inner circumference of the outer rotor. A first, second, and third inner rotor is disposed within the outer rotor. The first, second, and third inner rotors includes a magnetic pole pairs disposed on an outer circumference thereof. The first inner rotor and the third inner rotor have a thickness of approximately half the thickness of the second inner rotor. The first inner rotor, the second inner rotor, and the third inner rotor balance moments acting on a drive shaft.

Abstract: An antenna and a detecting device are provided. The antenna includes a ground plane, a pole and a microstrip line. The detecting device includes an oscilloscope and the antenna that is connected with the oscilloscope.

Abstract: A self-excited brushless machine with compensated field windings includes a rotor and a stator. The rotor Includes a field winding secured to the rotor, an auxiliary winding secured to the rotor, and an energy converter associated with the rotor and configured to convert current between the field winding and the auxiliary winding. The stator includes a multiphase winding. The self-excited brushless machine uses a first current to generate a first magnetomotive force on a stator of the machine, and uses a second current to generate a second magnetomotive force. A third current is induced on auxiliary windings of a rotor of the machine using the second magnetomotive force. A rotor field winding of the machine is excited with the induced currents of the auxiliary windings.

Abstract: In some aspects, a magnetic gear system includes a flux focusing magnet arrangement having a low-pole count rotor, a pair of modulator rotors disposed on either side of the low-pole count rotor, and a pair of high-pole count outer rotors disposed outside of the pair of modulator rotors. In some aspects, a magnetic gear system includes a motor with a stator and a pair of low-pole count rotors disposed on either side of the stator. The magnetic gear system further includes a pair of modulator rotors disposed on either side of the motor, and a pair of high-pole outer rotors disposed on opposite sides of the pair of modulator rotors.

Abstract: An electric machine includes a stator having a plurality of stator teeth. Each stator tooth of the plurality of stator teeth includes a winding disposed there around. Each stator tooth of the plurality of stator teeth is shaped to receive a plurality of microchannels. The microchannels contain a circulating heat-transfer fluid; Each stator tooth of the plurality of stator teeth is thermally exposed to the heat-transfer fluid via the plurality of microchannels so as to effectuate heat removal from each stator tooth of the plurality of stator teeth.

Abstract: An antenna and a detecting device are provided. The antenna includes a ground plane, a pole and a microstrip line. The detecting device includes an oscilloscope and the antenna that is connected with the oscilloscope.

Abstract: An electric machine includes a stator having a stator winding disposed thereon. A rotor is electromagnetically exposed to the stator. A field winding and an induction winding are disposed on the rotor. A rectifier is electrically coupled to the induction winding and the field winding. Upon application of a voltage to the stator winding, the stator winding produces a first rotating magnetic field and a second rotating magnetic field that has a different spatial frequency than the first rotating magnetic field. The first rotating magnetic field interacts asynchronously with the induction winding to produce an alternating current in the induction winding. The rectifier changes the alternating current to a direct current that is supplied to the field winding. The field winding interacts synchronously with the second rotating magnetic field.

Abstract: An electric machine includes a stator having a stator winding disposed thereon. A rotor is electromagnetically exposed to the stator. A field winding and an induction winding are disposed on the rotor. A rectifier is electrically coupled to the induction winding and the field winding. Upon application of a voltage to the stator winding, the stator winding produces a first rotating magnetic field and a second rotating magnetic field that has a different spatial frequency than the first rotating magnetic field. The first rotating magnetic field interacts asynchronously with the induction winding to produce an alternating current in the induction winding. The rectifier changes the alternating current to a direct current that is supplied to the field winding. The field winding interacts synchronously with the second rotating magnetic field.

Abstract: A power converter includes a multiple-winding transformer. The multiple-winding transformer provides an electromagnetic link between an input side and an output side of the power converter. An inductor is arranged on at least one of the input side and the output side of the power converter in parallel with the multiple-winding transformer. At least one first capacitor is arranged on the input side of the power converter in parallel with the multiple-winding transformer and the inductor. At least one second capacitor is arranged on the output side of the power converter in parallel with the multiple-winding transformer. The inductor, the at least one first capacitor, and the at least one second capacitor define a parallel resonance tank. A first plurality of switching devices is arranged on the input side. A second plurality of switching devices is arranged on the output side.

Abstract: An axial flux magnetic geared machine includes a high speed magnetic rotor and a low speed magnetic rotor maintained in a spaced relationship from the high speed magnetic rotor. A modulating structure is disposed between the high speed magnetic rotor and the low speed magnetic rotor. A stator is disposed in a radially central bore of one or more of the high speed magnetic rotor, the low speed magnetic rotor, and the modulating structure.

Abstract: A power converter includes a multiple-winding transformer. The multiple-winding transformer provides an electromagnetic link between an input side and an output side of the power converter. An inductor is arranged on at least one of the input side and the output side of the power converter in parallel with the multiple-winding transformer. At least one first capacitor is arranged on the input side of the power converter in parallel with the multiple-winding transformer and the inductor. At least one second capacitor is arranged on the output side of the power converter in parallel with the multiple-winding transformer. The inductor, the at least one first capacitor, and the at least one second capacitor define a parallel resonance tank. A first plurality of switching devices is arranged on the input side. A second plurality of switching devices is arranged on the output side.

Abstract: An axial flux magnetic geared machine includes a high speed magnetic rotor and a low speed magnetic rotor maintained in a spaced relationship from the high speed magnetic rotor. A modulating structure is disposed between the high speed magnetic rotor and the low speed magnetic rotor. A stator is disposed in a radially central bore of one or more of the high speed magnetic rotor, the low speed magnetic rotor, and the modulating structure.

Abstract: Controlling a multiphase electric motor by controlling the transmission of power to a first set of phases of a multiphase electric motor in accordance with a first operating configuration; detecting the presence of a shorted phase in the first set of phases while the first set of phases are being operated in accordance with the first operating configuration; and, responsive to detection of the shorted phase, adjusting control of the transmission of power to the multiphase electric motor such that power is transmitted to a second set of phases in accordance with a second operating configuration.

Abstract: Controlling a multiphase electric motor by controlling the transmission of power to a first set of phases of a multiphase electric motor in accordance with a first operating configuration; detecting the presence of a shorted phase in the first set of phases while the first set of phases are being operated in accordance with the first operating configuration; and, responsive to detection of the shorted phase, adjusting control of the transmission of power to the multiphase electric motor such that power is transmitted to a second set of phases in accordance with a second operating configuration.

Abstract: A multiphase electric motor for a down-hole electrical submersible pump having a rotor having a first set of rotor voids filled or partially filled with permanent magnetic material. The electric motor having a stator with three or more stator slots, three or more stator teeth and three or more coils. Individual ones of the three or more coils are wound about at least one of the individual ones of the three or more stator teeth, and positioned such that adjacent coils are non-overlapping or partially overlapping to form a fractional slot per pole per phase winding. The electric motor having a power supply configured to provide power to the three or more phase windings formed by series or parallel combination of the three or more coils and a controller configured to control transmission of power through the three or more windings.

Abstract: Three resonance-based universal power converter topologies are disclosed. One includes a partially resonant parallel L-C link and incorporates intermediate cross-over switching circuits between the link stage and each of the input and output stages (which are constructed using unidirectional switches), thereby permitting the partially resonant circuit to be operated bi-directionally. A second includes a partially resonant series LC link in parallel with the input and output networks. A third includes a partially resonant series LC link in series between the input and output networks. The input and output networks can be formed from either bidirectional switches or a combination of unidirectional switches and intermediate cross-over switching circuits, permitting the partially resonant circuit to be operated bi-directionally.

Abstract: Three resonance-based universal power converter topologies are disclosed. One includes a partially resonant parallel L-C link and incorporates intermediate cross-over switching circuits between the link stage and each of the input and output stages (which are constructed using unidirectional switches), thereby permitting the partially resonant circuit to be operated bi-directionally. A second includes a partially resonant series LC link in parallel with the input and output networks. A third includes a partially resonant series LC link in series between the input and output networks. The input and output networks can be formed from either bidirectional switches or a combination of unidirectional switches and intermediate cross-over switching circuits, permitting the partially resonant circuit to be operated bi-directionally.

Abstract: The present invention provides a system, apparatus and method for driving a permanent magnet (PM) machine supplied by a Current Source Inverter (CSI). A DC-DC voltage to current converter (chopper) with an inductor value inversely related to the operating frequency of the DC chopper for a given DC Link current ripple, acts as a current source for the CSI. The DC source for the DC-DC voltage to current converter can be from a DC power source or supply, or an AC power source or supply electrically connected to a rectifier/Pulse Width Modulated (PWM) rectifier.

Abstract: A unipolar drive includes a booster, an energy storage module, and a unipolar inverter. The booster increase a voltage received from a power supply to produce an energy output. The energy storage module store at least some of the energy output by the booster. The unipolar inverter energizes windings of a motor using energy from the booster and returns energy from the windings to the booster when the windings are not being energized.