A system includes an alternating current (AC) bus. An active rectifier is connected to receive alternating current from the AC bus. An exciter inductor coil is connected to receive direct current (DC) output from the active rectifier. A method includes performing current control on an alternating current (AC) bus to output DC current to an exciter inductor coil.

A portable electrical generation system includes a generator having a rotor and a plurality of stators to produce a supply of electrical energy, a prime mover operable to drive the rotor, a voltage selector control operably connected to the generator, and a link board assembly configured to removably engage the voltage selector control, the link board assembly including a base board and a plurality of bus bars, the bus bars being arranged to electrically orient the plurality of stators to provide a first power output configuration.

A module for controlling a rotary electric machine for a motor vehicle includes a calculating program, a value of the rotor coil voltage Vrot, a resistance value of the rotor coil Rrot, a value of the rotor coil induction Lrot. The program estimates the rotor coil current Irot according to this formula: Irot[k]=Irot[k−1]+(Vrot[k−1]−Irot[k−1]×Rrot)/Lrot×Ts in which Irot[k−1] is the estimate of the rotor coil current previously calculated at time k−1 and Ts is the sampling time between the index k−1 and the index k. To switch from a motor mode to a neutral mode, the control module is configured to control a shorting of the phases of the stator after the estimated rotor coil current Irot is equal to a predetermined value.

To provide a controller for AC rotary machine which can detect the field current flowing through the field winding with good accuracy and can suppress the heat generation of the current detection circuit. A controller for AC rotary machine is provided with a bus current detection circuit that detects a bus current which flows through a connection path between a DC power source and a converter; a converter switching control unit that switches a power supply path and a circulation path of the converter; and a current calculation unit that calculates a field current flowing into the field winding, based on a bus current in suppling power detected when switching to the power supply path and a bus current in circulating detected when switching to the circulation path.

Systems and methods for voltage regulation of high voltage direct current systems are provided. In certain embodiments, a system includes a generator that generates alternating current (AC) voltage. The system further includes a power converter that converts the AC voltage into regulated direct current (DC) voltage. Also, the system includes a voltage regulator. In additional embodiments, the voltage regulator includes an AC voltage regulator that regulates the AC voltage generated by the generator. Also, the voltage regulator includes a DC voltage regulator that regulates the DC voltage produced by the power converter. Moreover, the voltage regulator includes a regulator selector that selectively activates one of the AC voltage regulator and the DC voltage regulator based on a current from the power converter and at least one of a voltage of the generator and a voltage of the power converter.

A direct-current (DC) power generation system for a vehicle, a boosting shunt regulator, and a method of regulating the output of an AC generator with the boosting shunt regulator are provided. The boosting shunt regulator includes gated power switches electrically coupled between AC generator contacts and output contacts. A shunt operates the power switches at duty cycles selected to boost the AC voltages output by the AC generator.

A motor power supply device includes a first power supply, a motor driven by a power supplied from the first power supply, a first power supply line, a first power supply side semiconductor switch, a first output side semiconductor switch, a first power supply side voltage detection unit disposed on a first power supply side with respect to the first power supply side semiconductor switch on the first power supply line and configured to detect a voltage of the first power supply line, and a control unit configured to execute control to determine a state of power supply from the first power supply to the first power supply side semiconductor switch based on a measured value obtained by the first power supply side voltage detection unit.

In accordance with at least one aspect of this disclosure, a method can include measuring a voltage across a DC link of a generator system when a generator exciter is inactive and a generator permanent magnet is active, and detecting a short or open permanent magnet generator (SOPMG) fault condition in the generator system with a DC link monitor operatively connected to measure the voltage across the DC link.

A variable-speed constant-frequency (VSCF) power converter includes a generator control operable to regulate an output voltage of a variable frequency generator at a variable frequency. The VSCF power generator also includes an inverter control operable to regulate a VSCF output voltage at a point-of-regulation at a constant frequency, where the generator control and the inverter control independently control a main line contactor of the point-of-regulation to provide redundant fault protection for an aircraft use.

A generator control unit (GCU) includes a fault detection system configured to generate a direct current (DC) voltage signal based on a difference of a DC-equivalent voltage between the positive and negative exciter gate drive signals. The fault detection system further outputs a fault detection signal indicating the fault status of the gate drive integrated circuits based on a comparison between the DC average voltage signal and a threshold value.