An electric motor includes a plurality of phases and a switching device. The phases extend between respective terminals and are divided into a plurality of distinct groups, in particular at least a first group and a second group. The switching device is coupled to the first group and is operable to switch an electrical configuration thereof. The second group of phases is instead configured to maintain its electrical configuration unchanged during the switching of the electrical configuration of the first group.

Systems and methods for an externally excited electric machine. The method for operation of the externally excited electric machine, in one example, includes operating the externally excited electric machine above a threshold speed in a first stator winding configuration of a stator and switching the stator from the first winding configuration to a second winding configuration while the externally excited electric machine is maintained above the threshold speed. In the system, the externally excited electric machine includes multiple rotor windings which are configured to be externally excited.

Reconfigurable permanent magnet electrical machines and aircraft power and propulsion systems including the electrical machines. An aircraft power and propulsion system includes: a gas turbine engine; DC electrical network; permanent magnet electrical machine including a rotor drivingly coupled to a spool of the engine, and a stator including windings controllably switchable between a star and a delta configuration; an AC-DC power electronics converter, an AC side is connected to terminals of the stator windings and a DC side is connected to the DC electrical network; an additional electrical power source connected to and controllable to supply electrical power to the DC electrical network; and a control system configured to control the switching of the stator windings between the configurations and to control the additional electrical power source to supply electrical power to the DC electrical network during a time interval when the stator is being switched between the configurations.

A wall-mountable load control device may include an illuminated rotary knob for providing a nightlight feature. The load control device may be configured to control an intensity of a lighting load. The load control device may include a yoke adapted to be mounted to an electrical wall box, an enclosure attached to the yoke, a faceplate attached to the yoke and having an opening, a mounting member attached to the yoke, and/or a potentiometer located within the enclosure and having a shaft extending through an opening in the yoke and the opening of the faceplate. The load control device may include a collar attached to the boss of the mounting member and surrounding the shaft of the potentiometer. The mounting member may be configured to conduct light from at least one light source housed within the enclosure to illuminate the faceplate.

A hybrid induction machine includes a stator with an input winding, a plurality of output windings with output ports, and a rotor connected to a flywheel operating as a reserve of kinetic energy to buffer surges in demand for electrical power due to large, pulsed loads with high repetition rates. Degradation of power quality at the output ports of the hybrid induction machine due to electrical noise on a main bus providing electrical power to the hybrid induction machine and other apparatus can be eliminated through the use of feed-forward harmonic cancellation signals, galvanic and magnetic isolation of the output ports, and damper networks.

According to an embodiment of the present disclosure, an apparatus includes a transformer having a set of input terminals, a first set of output terminals, and a second set of output terminals. First and second rectifiers are coupled to the first and second sets of output terminals, respectively. The transformer is configured to transform three phase alternating current (AC) provided to the set of input terminals into first and second three phase AC outputs at the first and second sets of output terminals, respectively. The first three phase AC output is phase shifted from the second three phase AC output.

The disclosure relates to a drive assembly for an electric vehicle and to operation of a drive assembly. The drive assembly can comprise an electric drive machine with three phase strands. The drive assembly can comprise a switching means being configured for selectively switching the three phase strands in a delta configuration or in a star configuration. The drive assembly can also comprise a battery unit, wherein the battery unit comprises a plurality of battery cells and a plurality of cell-level control units. Each of the cell-level control units can be electrically connected to an associated battery cell out of the plurality of battery cells, or to an associated group of battery cells out of the plurality of battery cells, and each of the cell-level control units can comprise a cell-level inverter unit.

A wall-mountable load control device may include an illuminated rotary knob for providing a nightlight feature. The load control device may be configured to control an intensity of a lighting load. The load control device may include a yoke adapted to be mounted to an electrical wall box, an enclosure attached to the yoke, a faceplate attached to the yoke and having an opening, a mounting member attached to the yoke, and/or a potentiometer located within the enclosure and having a shaft extending through an opening in the yoke and the opening of the faceplate. The load control device may include a collar attached to the boss of the mounting member and surrounding the shaft of the potentiometer. The mounting member may be configured to conduct light from at least one light source housed within the enclosure to illuminate the faceplate.

A DC electric motor including both coils in a delta configuration and coils in a wye configuration. When pulses are fed to selected ones of the coils to power the electric motor, both coils from the delta configuration and coils from the wye configuration are fed with the DC pulse. In some embodiments, a similar electric generator is provided.

An electronic control system comprising an electric battery pack to provide a direct electric voltage, an inverter that receives the direct voltage, and is configured to provide a first three-phase alternating electric voltage, a commutator device that receives the first three-phase alternating electric voltage and is configured to switch, in response to a control signal, between a first switching state, in which it connects the three stator windings according to a star-shaped electrical configuration, and a second switching state, in which it electrically connects the three stator windings according to a delta electrical configuration, and an electronic control unit that switches the commutator device between the first and the second switching state based on one or more first parameters of the automotive vehicle and/or one or more second parameters of the electric motor.