An inverter type engine generator includes an alternator operable as a motor for starting an engine; a converter composed of a three-phase rectifying bridge circuit, converting three-phase alternating current output from the alternator into direct current, and operatable as a motor driver for driving the alternator when power is supplied from a power source; and a processor and a memory. The upper and lower three sets of elements of the three-phase rectifying bridge circuit of the converter are configured such that upper elements are configured from duty-controllable switching elements and thyristors connected in parallel therewith, and lower elements are configured from duty-controllable switching elements having diodes. The processor and the memory perform turning off the lower elements and controlling the duty of the thyristors while turning off the upper elements so that an output voltage of the three-phase rectifying bridge circuit is reduced, when a detected terminal voltage of the converter exceeds the target voltage.

The power conversion apparatus includes a converter circuit that converts an alternating-current voltage output from an alternating-current power supply into a direct-current voltage. The converter circuit includes unit converters. The power conversion apparatus includes current detectors that detect respective currents flowing through respective reactors. In first and second unit converters adjacent to each other among the unit converters, a phase difference between a first phase and a second phase is changed from a reference phase difference when a total current of currents detected by the respective current detectors is greater than a threshold. The first phase is a phase at a time when the switching element of the first unit converter is turned on. The second phase is a phase at a time when the switching element of the second unit converter is turned on.

There is provided a driving system configured to control an input current of a boost converter when temperature of a reactor becomes higher than a temperature reference value that is lower than a heatproof temperature of the reactor, compared with the input current when the temperature of the reactor is equal to or lower than the temperature reference value. A first temperature is set to the temperature reference value when ambient temperature is equal to or higher than a predetermined temperature. A second temperature that is higher than the first temperature is set to the temperature reference value when the ambient temperature is lower than the predetermined temperature.

A controller includes a voltage increasing unit and a pre-charge controlling unit. The voltage increasing unit stops a voltage increasing operation of a converter based on a converter controlling signal delivered from the pre-charge controlling unit. After the charged voltage of the capacitor shifts from an increase to a decrease in response to stopping of the voltage increasing operation of the converter, the pre-charge controlling unit refrains from switching a relay when a charged voltage of a capacitor is out of a target voltage range, and establishes an electrical connection of the relay when the charged voltage of the capacitor becomes a value within a target voltage range.

The disclosure relates to an electric aircraft propulsion assembly comprising: an electric storage unit; a first electric motor connected to power a first propulsor; a first converter configured as a DC:AC converter having input connections connectable to the electric storage unit and output connections connected across the first electric motor, the first converter configured as a DC:AC converter; a second electric motor connected to power a second propulsor; a second converter connected between the first converter input connections and the second electric motor; and a controller configured to control operation of the first and second converters, wherein the second converter is operable as a DC:AC converter to convert the DC supply from the electric storage unit to an AC supply across the second electric motor and as a DC:DC converter to convert the DC supply from the electric storage unit at a first DC level to a DC supply at the input connections of the first converter at a second DC level.

A shift device includes: a motor drive circuit; a motor driver unit for driving the motor drive circuit; a control unit that controls the motor driver unit; a motor power supply path; a system power supply path; and a buck-boost unit that converts electric power supplied from the system power supply path to a predetermined voltage and outputs the voltage. Electric power is supplied to the control unit via the buck-boost unit, and either the electric power from the motor power supply path or the electric power from the system power supply path is supplied to the motor driver unit based on a voltage.

Provided is an electric linear motion actuator that enables size reduction and cost reduction while increasing the instantaneous output of an electric motor. A control device (2) of the electric linear motion actuator includes: a motor driver (24) configured to control power supplied to a coil (4b) of an electric motor (4); a power storage unit (21) connected to a power supply device (3) and the motor driver (24); a current flow direction restriction unit (20) disposed between the power supply device (3) and the power storage unit (21), which causes current to pass only in a direction in which power is supplied from the power supply device (3); and a step-up unit (19) configured to step up voltage of the power supply device (3) and provide the stepped-up voltage to the power storage unit (21).

The present motor control device includes an inverter, a converter, and a control device. The control device has a rotation speed calculation unit that calculates a rotation speed of a motor; an optimum voltage calculation unit that calculates an optimum input voltage; a minimum voltage calculation unit that calculates a minimum input voltage required to operate the motor at a motor operating point; and a target value setting unit that sets either one of the optimum input voltage and the minimum input voltage as a target input voltage. In a case in which the set target torque exceeds a predetermined value, the target value setting unit sets the minimum input voltage lower than the optimum input voltage as the target input voltage.

A power conversion device include: a power conversion circuitry configured to generate a driving voltage for an electric motor; and control circuitry configured to: control the power conversion circuitry to generate the driving voltage corresponding to a voltage command; acquire information indicating an output current that has flown to the electric motor according to the driving voltage; calculate a phase error based on the voltage command, the output current, and an inductance of the electric motor; calculate an updated voltage command based on a frequency command, the output current, and the inductance, wherein the updated voltage command has a command phase; calculate a phase error based on the voltage command, the output current, and the inductance; correct the command phase based on the phase error; and control the power conversion circuitry to generate the driving voltage corresponding to the updated voltage command having the corrected command phase.

A bi-directional electrical charging system for a motor vehicle includes a rechargeable energy storage system (RESS) configured to store a first voltage. The RESS is adapted for use with an off-board power source that is configured to store a second voltage. The system further includes an electric motor having a plurality of machine windings. The system further includes a power inverter disposed between the RESS and the off-board power source. The system is movable to a forward buck mode, a reverse buck mode, a forward boost mode, and a reverse boost mode for selectively delivering electrical power from one of the RESS and the off-board power source to the other of the RESS and the off-board power source, in response to the power inverter cycling between at least two of the ON state, the RESS OFF state, and the external OFF state.