Abstract: An example electrical power system includes a DC bus connected to a load, a plurality of generators driven by rotation of a common shaft, and a plurality of power converters. Each power converter includes an active rectifier controller that operates a respective active rectifier to rectify AC from a respective one of the generators to DC on the DC bus. A load sharing controller is operable to provide a respective adjustment signal to each respective power converter that is enabled, the respective adjustment signals based on a difference between an average output current across all of the active rectifiers that are enabled, and a particular output current of the respective power converter. Each active rectifier controller is operable to determine a quadrature current value for its associated generator based on its adjustment signal.

Abstract: A method of compensating for rotor position error of a rotor of a permanent magnet synchronous generator (PMG) that provides electrical power to a direct current (DC) power generating system, the method including obtaining PMG phase voltages and resolver processed angular position output when the PMG is driven by a prime mover. Once obtained, a PMG fundamental phase voltage waveform is selected by eliminating higher order harmonics. A mechanical angle of the rotor is then converted into an electrical angle, then the electrical angle is aligned within the mechanical angle with a corresponding PMG fundamental phase voltage angle by adjusting offset to the electrical angle. After alignment, a plurality of resolver error offset values associated with the electrical angle are stored and additional values to the compensation table are added by interpolating data between two corresponding resolver error offset values of the plurality of resolver error offset values.

Abstract: An aircraft power generation unit to generate direct current (DC) power provided to a load includes a permanent magnet generator (PMG) that includes first, second, third and fourth sets of windings, each of the winding sets including three windings and a rectifier section with four six pulse rectifiers the produce outputs of Vdc1 to Vdc4 respectively and a common local output bus. The unit also includes an output bus configured to be connected to the load and including a positive output bus rail and a negative output bus rail and a controller that receives an input signal from at least one of the output sets and selectively couples either the common local output bus and fourth rectifier negative rail to the output bus negative rail and one or more of the first to third six-pulse rectifiers to the output bus positive rail to provide a constant voltage to the load.

Abstract: An Output Supply System (OSS) may comprise an Electric Power Generating System (EPGS) comprising a first Permanent Magnet Synchronous Machine (PMSM), a first three-phase multifunction converter, a first three-position switch, a battery management system, wherein the PMSM, the first three-phase multifunction converter, the first three-position switch, and the battery management system are in electronic communication, and a first tangible, non-transitory memory configured to communicate with a first controller, the first tangible, non-transitory memory having instructions stored thereon that, in response to execution by the first controller, cause the first controller to perform operations.

Abstract: A hybrid permanent magnet machine has a stator including armature windings. A rotor includes permanent magnets, a main field winding, and a rechargeable energy source. An output voltage control circuit, including an H bridge circuit configured to provide control current magnitude and direction in the main field winding to control the current passing across the main field windings.

Abstract: An Output Supply System (OSS) may comprise an Electric Power Generating System (EPGS) comprising a first Permanent Magnet Synchronous Machine (PMSM), a first three-phase multifunction converter, a first three-position switch, a battery management system, wherein the PMSM, the first three-phase multifunction converter, the first three-position switch, and the battery management system are in electronic communication, and a first tangible, non-transitory memory configured to communicate with a first controller, the first tangible, non-transitory memory having instructions stored thereon that, in response to execution by the first controller, cause the first controller to perform operations.

Abstract: An electric power system (EPS) may comprise a first power conversion channel and a second power conversion channel connected in parallel with a permanent magnet synchronous machine (PMSM). The first power conversion channel may be suitable for a load having a first electronic characteristic. The second power conversion channel may be suitable for a load having a second electronic characteristic. The first power conversion channel may comprise a first rectifier configured to receive an alternating current (AC) power from the PMSM and rectify the AC power into a first direct current (DC) power, a first buck converter configured to receive the first DC power from the first rectifier and reduce a voltage of the first DC power, and a first output filter configured to filter the first DC power and supply the first DC power to a first load.

Abstract: An electric power system (EPS) may comprise a permanent magnet synchronous generator (PMSG), a high speed rectifier configured to receive a first alternating current (AC) power from the PMSG, and a low speed rectifier configured to receive a second AC power from the PMSG. The low speed rectifier may be configured to receive the first AC power in response to the PMSG rotating at a first rotational speed, and the high speed rectifier may be configured to receive the second AC power in response to the PMSG rotating at a second faster rotational speed.

Abstract: An example electrical power system includes a DC bus connected to a load, a plurality of generators driven by rotation of a common shaft, and a plurality of power converters. Each power converter includes an active rectifier controller that operates a respective active rectifier to rectify AC from a respective one of the generators to DC on the DC bus. A load sharing controller is operable to provide a respective adjustment signal to each respective power converter that is enabled, the respective adjustment signals based on a difference between an average output current across all of the active rectifiers that are enabled, and a particular output current of the respective power converter. Each active rectifier controller is operable to determine a quadrature current value for its associated generator based on its adjustment signal.

Abstract: An example electrical power system of a vehicle includes a DC bus operable to power a DC load of the vehicle and a power grid external to the vehicle, a DC power generating system, a multifunctional traction drive system, and a controller. The DC power generating system includes a battery, and a first power converter operable in an active rectification mode, an inverter mode, and at least one DC-DC converter mode. The multifunctional traction drive system includes a second power converter operable to cooperate with the DC power generating system for operation in an inverter mode and at least one DC-DC converter mode. The controller is operable to select an output configuration of the battery and an operating mode of each of the first and second power converters according to a plurality of predefined system configurations.

Abstract: An example vehicle electrical power system includes a battery operable to power a DC load of a vehicle over a DC bus, a capacitor, a multiphase AC machine comprising a plurality of windings, and a power converter. The power converter includes a plurality of power switches and a controller. The controller is configured to, in a first mode, charge the battery by operating the power converter as an active rectifier; in a second mode, operate the power converter as a buck converter that decreases a voltage from the DC bus, and charge the capacitor from the decreased voltage; and in a third mode, operate the power converter as a boost converter for the capacitor that increases an output voltage of the DC bus, and provide the increased output voltage to the DC load. The power converter utilizes the windings when operated as the active rectifier, buck converter, and boost converter.

Abstract: An example vehicle electrical power system includes a battery operable to power a load of a vehicle over a direct current (DC) bus, a multiphase alternating current (AC) machine comprising a plurality of windings, and a power converter. The power converter includes a plurality of power switches and a controller. The controller is configured to, in a first mode, operate the power converter as an active rectifier that provides current to the DC bus to supply DC loads, and charge the battery from the current on the DC bus; and in a second mode, operate the power converter as a boost converter that converts a variable output voltage of the battery to a constant voltage on the DC bus. The power converter utilizes the plurality of windings when operated as an active rectifier and boost converter. A method of operating a vehicle electrical power system is also disclosed.

Abstract: A method of compensating for rotor position error of a rotor of a permanent magnet synchronous generator (PMG) that provides electrical power to a direct current (DC) power generating system, the method including obtaining PMG phase voltages and resolver processed angular position output when the PMG is driven by a prime mover. Once obtained, a PMG fundamental phase voltage waveform is selected by eliminating higher order harmonics. A mechanical angle of the rotor is then converted into an electrical angle, then the electrical angle is aligned within the mechanical angle with a corresponding PMG fundamental phase voltage angle by adjusting offset to the electrical angle. After alignment, a plurality of resolver error offset values associated with the electrical angle are stored and additional values to the compensation table are added by interpolating data between two corresponding resolver error offset values of the plurality of resolver error offset values.

Abstract: An electric power generating system (EPGS) may comprise a permanent magnet generator (PMG) comprising a rotor comprising a permanent magnet and a stator comprising a first armature winding configured to output a first three-phase voltage, and a second armature winding configured to output a second three-phase voltage. The EPGS may further comprise a passive rectifier configured to rectify the first three-phase voltage, an active rectifier configured to rectify the second three-phase voltage, and an active rectifier controller, wherein the active rectifier is controllable in response to a current reference received by the active rectifier controller. An EPGS may comprise a tunable notch filter configured to filter a first DC voltage and/or a DC output voltage, in accordance with various embodiments.

Abstract: An assembly for operating a DC synchronous machine according to an exemplary aspect of the present disclosure includes, among other things, a controller that is configured to determine a position of a rotating portion utilizing a carrier signal, adjust current supply to a field winding, and monitor and adjust operation of the DC synchronous machine based on various electrical parameters relating to the carrier signal. A method for operating a DC synchronous machine is also disclosed.

Abstract: An electric power generating system (EPGS) may comprise a permanent magnet generator (PMG) comprising a rotor comprising a permanent magnet and a stator comprising a first armature winding configured to output a first three-phase voltage, and a second armature winding configured to output a second three-phase voltage. The EPGS may further comprise a passive rectifier configured to rectify the first three-phase voltage, an active rectifier configured to rectify the second three-phase voltage, and an active rectifier controller, wherein the active rectifier is controllable in response to a current reference received by the active rectifier controller. An EPGS may comprise a tunable notch filter configured to filter a first DC voltage and/or a DC output voltage, in accordance with various embodiments.

Abstract: An assembly for a direct current (DC) synchronous machine, according to an exemplary aspect of the present disclosure includes, among other things, a stationary portion including a direct current (DC) armature winding and a rotating portion including alternating current (AC) field winding configured to supply DC output to the DC armature winding. A rotating inverter is configured to selectively communicate current to the AC field winding such that a frequency of the current is adjusted to approach synchronization with a position of the rotating portion. A method for generating DC output from a DC synchronous machine is also disclosed.

Abstract: An assembly for operating a DC synchronous machine according to an exemplary aspect of the present disclosure includes, among other things, a controller that is configured to determine a position of a rotating portion utilizing a carrier signal, adjust current supply to a field winding, and monitor and adjust operation of the DC synchronous machine based on various electrical parameters relating to the carrier signal. A method for operating a DC synchronous machine is also disclosed.

Abstract: An electric power generating system (EPGS) may comprise a permanent magnet generator (PMG) comprising a rotor comprising a permanent magnet, and a stator comprising a plurality of armature windings configured to output a plurality of three-phase voltages, and a plurality of rectifiers corresponding to the plurality of armature windings and configured to rectify the plurality of three-phase voltages, wherein the plurality of rectifiers are connected in series.

Abstract: A rotor portion of a synchronous machine includes a rotor. The rotor carries a field winding and a re-chargeable power storage device. The re-chargeable power storage device is electrically connected to the field winding to provide electrical power to the field winding while in generate or motor mode, and to provide electrical power to the re-chargeable power storage device while in a charge mode.