A system and a method for parallel power supply control for auxiliary converters of a motor train unit in the presence of interconnecting lines. The system comprises multiple three-phase inverter modules. The multiple three-phase inverter modules are in parallel connection with each other. Any two-phase circuit of a three-phase inverter module is separately in parallel connection with a corresponding two-phase circuit of a three-phase inverter module adjacent to the three-phase inverter module by using a connecting line module. The connecting line module is connected to a control system. The three-phase inverter modules are also connected to the control system. The three-phase lines of the three-phase inverter modules are all provided with switches. Less interconnecting lines are used, and any two phases of the three-phase inverter modules are separately in parallel connection, and therefore, stable power supply is achieved by balancing currents of any two phases of the three-phase circuits, and the system reliability is improved.

An electric vehicle may include at least one motor configured to transmit a drive output. A motor-generator unit may be configured to supply the at least one motor with electrical power. The motor-generator unit may include an internal combustion piston engine, which may include a crankshaft configured to rotation about an axis of rotation, and an electrical generator that may be drive connected to the piston engine. A control device may be in communication with the motor-generator unit. The control device may be configured to vary a generator torque of the electrical generator during a rotation cycle of the crankshaft in response to a crankshaft angle.

A machine having a series electric drivetrain system includes an engine to provide mechanical energy to an electric generator, the electric generator able to convert the mechanical energy received from the engine into electrical energy, the electric generator including an input shaft extending through the electric generator, a rotor to rotate on the input shaft, and the input shaft is able to rotate an input gear, an idler gear, a pump drive gear, and a rotor gear, a motor to receive the electrical energy and to produce a rotational output, a single speed ratio direct drive to transfer the rotational output of the motor to a torque output to deliver to a drive shaft, and power electronics to control the electrical energy between the electric generator and the motor and to regulate the rotational output of the motor.

A power-electronics system includes a plurality of power modules each having a power stage and defining a side pocket. The power stages are stacked in an array such that the side pockets are interleaved with the power stages. A dummy module defines a first coolant pocket and is disposed within the array such that the first coolant pocket cooperates with one of the side pockets to define a coolant chamber.

A method for extracting power from intraluminal pressure changes may comprise one or more of the following steps: (a) receiving an intraluminal pressure change; (b) converting the intraluminal pressure change into energy with an intraluminal generator; and (c) storing the energy in an energy storage apparatus.

A system for powering a hotel load in a vehicle which has a power supply with a positive pole and a negative pole, an alternator connected to the engine and in direct connection with the power supply, a starter connected to the engine and in direct electrical communication with the power supply. The vehicle also has a power inverter in electrical communication with the power supply through a pair of power inverter cables. The alternator, the starter, and the power inverter are connected in parallel and directly to the power supply.

A topology for electric power distribution in a vehicle includes a high-voltage bus connected to a DC-DC electric power converter that is connected to a low-voltage DC load. The DC-DC electric power converter includes a high-voltage switching circuit, a transformer, and a low-voltage rectifier. The high-voltage switching circuit includes first and second switches arranged in series between positive and negative legs of the high-voltage electric power bus at a first node that connects to a leg of an inductor of the transformer. A controller receives a command to discharge the high-voltage electric power bus, and in response, controls a first gate circuit to operate a first switch in a linear mode, and controls a second gate circuit to operate a second switch in a pulsewidth-modulated mode. A duty cycle for the pulsewidth-modulated operation of the second switch is determined based upon the magnitude of electric current.

An electrical system for use with an AC power supply having multiple phase voltages, e.g., three phase voltages, may include a high-voltage battery pack or other high-voltage DC device, a 12 VDC battery or other auxiliary-voltage DC device providing auxiliary power to the electrical system, multiple AC-DC converters, and a controller. The AC-DC converters each provide a DC output voltage to the high-voltage DC device, and are operable for converting a respective one of the phase voltages from the AC power supply into the DC output voltage. The controller selectively disables the AC-DC converters in response to a detected predetermined operating condition to thereby reduce consumption of the auxiliary power within the electrical system. A vehicle may include a high-voltage DC battery pack, an auxiliary-voltage DC battery providing auxiliary power, an onboard charging module, a charging port, an auxiliary power module, an electric machine, and a controller.

A mobile diesel generator and propulsion system preferably includes a diesel engine, a vehicle platform, a generator with voltage inverter, a battery charging system, at least one storage battery, an AC voltage to DC voltage converter, a motor controller and an AC motor. The generator with voltage inverter is driven by the diesel engine. The battery charging system receives AC voltage from the generator with voltage inverter and outputs a DC voltage to charge the at least one storage battery. The AC voltage to DC voltage converter receives output from the generator with voltage inverter and outputs a DC voltage to the motor controller. The motor controller receives DC voltage output from either the AC voltage to DC voltage converter or the at least one storage battery and outputs AC voltage to the AC voltage motor. The AC voltage motor drives a rear wheel of the vehicle platform.

The purpose of the present invention is to provide a torque command generation device for generating a motor-generated-torque command that makes it possible to maximize excitation force while ensuring necessary acceleration, and the like, within a limited motor torque range. A torque command generation device (6) is provided with: a maximum torque calculation unit (633) for calculating, according to a motor speed, a maximum torque value for a motor-generated-torque-command signal value; a DC component limiter (635) for calculating a DC signal value; a surplus amplitude calculation unit (637) for calculating a surplus amplitude by subtracting the maximum torque value from the sum of the DC component value calculated by the DC component limiter (635) and an externally input excitation amplitude; a sine-wave transmitter (639) for generating a sine wave having an amplitude obtained by subtracting the surplus amplitude from a base amplitude; and a summing unit (640) for calculating the motor-generated-torque-command signal value by adding the DC component value and the sine wave value.