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.

A mid-engine extended range electric vehicle includes a vehicle body, a turbo shaft engine, a battery pack, an electric generator, a vehicle control unit, drive motors, a gas controller, a battery controller, a gas storage tank and an intake box. Wherein the vehicle body includes a main body, bottom structure thereof forms frames of the vehicle; the engine is arranged on the frames between front and rear axles and near to the rear axle; an output shaft axis of the engine is located on a symmetry plane of the vehicle body, and an air inlet thereof faces tail of the vehicle; the intake box is communicated with the air inlet and is communicated with intake grilles on a covering piece of the vehicle body via pipelines. The vehicle has features of high effective energy conversion, good operating performance, long endurance mileage and high strength body.

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.

A system and method are provided for hybrid electric internal combustion engine applications in which a motor-generator, a narrow switchable coupling and a torque transfer unit therebetween are arranged and positioned in the constrained environment at the front of an engine in applications such as commercial vehicles, off-road vehicles and stationary engine installations. The motor-generator is preferably positioned laterally offset from the switchable coupling, which is co-axially-arranged with the front end of the engine crankshaft. The switchable coupling is an integrated unit in which a crankshaft vibration damper, an engine accessory drive pulley and a disengageable clutch overlap such that the axial depth of the clutch-pulley-damper unit is nearly the same as a conventional belt drive pulley and engine damper. The front end motor-generator system includes an electrical energy store that receives electrical energy generated by the motor-generator when the coupling is engaged. When the coupling is disengaged, the motor-generator may drive the pulley portion of the clutch-pulley-damper to drive the engine accessories using energy returned from the energy store, independent of the engine crankshaft.

A backup power system for a railroad power unit includes an emergency backup generator that enables continuous operation of both traction motors and accessories on the power unit when a main generator and/or an accessory power unit (APU) become inoperable. The backup generator can provide power to accessories on the railcar when the APU becomes inoperable and when power provided by the APU is diverted to the traction motors due to the main generator becoming inoperable.

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.

An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to charge multiple EVs and multiple conventional vehicles at the same time. The EV charging station can include a power source, an electric reservoir receiving power from the power source, an AC to DC power converter for receiving AC power from the power source and converting the AC power to DC power for supplying DC power to the electric reservoir, an EV charger receiving DC power from the electric reservoir; and a first DC to DC converter receiving DC power from the electrical reservoir and converting the DC power to DC power suitable for charging the electrical vehicle.

A propulsion system includes an electric propulsor and a gas turbine engine. The propulsion system also includes an electric machine coupled to a rotary component of the gas turbine engine generating a voltage at a baseline voltage magnitude during operation of the gas turbine engine. An electric communication bus is provided electrically connecting the electric machine to the electric propulsor. The propulsion system additionally includes a means for providing a differential voltage to the electric propulsor equal to about twice the baseline voltage magnitude.

Systems of an electrical vehicle and the operations thereof are provided. In particular, a towing cable and methods for utilizing the same in a towing scenario are described. The towing cable is described to facilitate the transfer of power between vehicles as well as data between vehicles. The data transferred between the vehicles involved in the towing include sensor information of the towed vehicle as well as control signals.

A method to control a hybrid vehicle with a parallel architecture and with an unknown speed profile, wherein the hybrid vehicle is provided with an internal combustion engine and with a reversible electrical machine connected to a storage system designed to store electrical energy; the method comprises the steps of recognizing the operating mode of the hybrid vehicle; determining a function of the specific fuel consumption of the drive system of the hybrid vehicle as a function of the operating mode of the hybrid vehicle; determining the optimal value of the power of the storage system and the optimal value of the power of the internal combustion engine, which correspond to the values that permit a minimization of said function.