Abstract: A variable gauge train control device comprises an inverter, a location detector, and a torque calculator. The inverter collectively controls torques of main electric motors. The location detector detects an entry into a gauge changeover section. The torque calculator, upon detection by the location detector of the entry into the gauge changeover section, suspends idling control that otherwise restricts the torques of the main electric motors and calculates a first torque pattern for making the inverter operate in accordance with the torques of the main electric motors.

Abstract: A charge-discharge control device (1) charges and discharges power storage devices (13, 23) through control of a converter (11) by a controller (14) and through control of a converter (21) by a controller (24). When the charge-discharge control device (1) acquires no warming-up operation command, the charge-discharge control device (1) charges the power storage devices (13, 23). When the charge-discharge control device (1) acquires a warmng-up operation command, the charge-discharge control device (1) repeats warmng-up operation to discharge one of the power storage devices (13, 23) and charge the other of the power storage devices (13, 23) using the discharged power so that the power storage devices (13, 23) alternately discharge.

Abstract: A current command generator 117 generates a current command that indicates a value of current supplied from an inverter circuit to electric motors connected in parallel with the inverter circuit. A voltage command calculator 120 generates a voltage compensation signal for compensating a difference between a value of actual current supplied to each of the electric motors and a value of current indicated by the current command. A determiner 135 determines, based on a value obtained from the voltage compensation signal, whether or not an abnormality is occurring in at least one of the electric motors. A shutdown controller 136 shuts down, upon the determiner 135 determining that an abnormality is occurring, the power supply from the inverter circuit to the each of the electric motors.

Abstract: A charging and discharging device includes a switching circuit, an input of which is connected to a power supply, the switching circuit adjusting an output current IB to a power storing unit connected to an output of the switching circuit, and a control unit configured to generate an ON/OFF signal DGC to the switching circuit. The control unit includes a temperature-rise control unit configured to separately generate, based on a signal BTMP equivalent to the temperature of the power storing unit, a control signal FC for adjusting a ripple component of the output current IB and a control signal OFS for adjusting a non-ripple component of the output current IB and generates the ON/OFF signal DGC based on the control signal FC and the control signal OFS and outputs the ON/OFF signal DGC to the switching circuit.

Abstract: A hybrid drive system includes first and second power supply devices supplying direct-current power, first and second power storage devices respectively connected to the first and second power supply devices and accumulating or discharging direct-current power, a first load device receiving direct-current power from the first power supply device and the first power storage device and driving a first load, a second load device receiving direct-current power from the second power supply device and the second power storage device and driving a second load, a first diode including an anode side terminal connected to an output side of the first power storage device, a second diode including an anode side terminal connected to an output side of the second power storage device, and an auxiliary power supply device to which a connection terminal of cathode side terminals of the first and second diodes is connected as an input terminal.

Abstract: An electric vehicle control apparatus includes a plurality of current collectors that take in electric power from an outside, a convertor unit that converts a voltage input through the current collectors into a direct current having a predetermined value, and a power storage unit connected to and charged and discharged by the convertor unit. The convertor unit includes a convertor circuit and a control unit. The control unit includes a current adjusting unit that generates a current command which is a command for an electric current of the convertor circuit, and adjusts the magnitude of the current command on the basis of a current collector state signal. The control unit further includes a current control unit that controls the electric current of the convertor circuit on the basis of the current command.

Abstract: An inverter device for an electric vehicle includes an inverter circuit that controls an electric motor connected to a wheel via a connecting member and a control unit that controls torque of the electric motor. The control unit includes a current control unit that executes control so that a q-axis current command for the electric motor matches a current flowing through the electric motor, and a limiter unit that puts limitations so that a magnitude of the q-axis current command does not become equal to or smaller than a preset predetermined value.

Abstract: A control device for an electric vehicle includes a converter circuit that converts a voltage input from an external power supply to a direct current having a predetermined value and outputs the direct current to a power storage unit, an inverter circuit that receives an arbitrary power supply from the external power supply or the power storage unit and converts power to an alternating current having a predetermined value, a converter control unit that controls the converter circuit based on a detection result of an abnormal state of the converter circuit and generates a protection status signal based on the detection result, and a inverter control unit that executes emergency control with respect to the inverter circuit, when the protection status signal is input, which indicates that the converter circuit is in an abnormal state.

Abstract: A control apparatus for an AC motor that drives and controls the AC motor includes a damping control unit that calculates a damping manipulated variable that suppresses a fluctuation in the capacitor voltage, wherein the damping control unit calculates a fluctuation rate of the capacitor voltage, calculates the damping manipulated variable based on the fluctuation rate and a predetermined value that is set as a value in a predetermined range around a maximum torque of the AC motor, generates a torque command or a current command of the AC motor based on the damping manipulated variable, and controls an inverter so as to change a current flowing in the inverter in a fluctuation suppressing direction with respect to a fluctuation in the capacitor voltage based on the torque command or the current command.

Abstract: A hybrid drive system includes first and second power supply devices that supply direct-current power; first and second power storage devices are respectively connected to the first and second power supply devices so as to accumulate or discharge the direct-current power; a first load device that receives a supply of the direct-current power from the first power supply device and the first power storage device and drives a first load; and a second load device that receives a supply of the direct-current power from the second power supply device and the second power storage device and drives a second load. The hybrid drive system includes an inter-group contactor for electrically connecting and disconnecting input terminals of the first power storage device and the second power storage device.

Abstract: A hybrid drive system includes first and second power supply devices supplying direct-current power, first and second power storage devices respectively connected to the first and second power supply devices and accumulating or discharging direct-current power, a first load device receiving direct-current power from the first power supply device and the first power storage device and driving a first load, a second load device receiving direct-current power from the second power supply device and the second power storage device and driving a second load, a first diode including an anode side terminal connected to an output side of the first power storage device, a second diode including an anode side terminal connected to an output side of the second power storage device, and an auxiliary power supply device to which a connection terminal of cathode side terminals of the first and second diodes is connected as an input terminal.

Abstract: Power conversion sub-blocks are combined to be configured as a power conversion block. The power conversion sub-blocks include power conversion modules including cooler base sections on which semiconductor elements are mounted and cooler fin sections provided on the rear surface side of semiconductor element mounting surfaces in the cooler base sections and cooler attachment members to which cooler fin sections are attached back to back, the cooler attachment members being configured to be capable of separating an opened section where the cooler fin sections are present and external air circulates and a closed section where the semiconductor elements are present and circulating cooling air to the cooler fin sections.

Abstract: A propulsion control apparatus for an electric motor car includes: an inverter apparatus connected to a DC power supply; a motor connected to an output of the inverter apparatus; a converter apparatus connected to an input of the inverter apparatus; and a power storage apparatus connected to an output of the converter apparatus, is configured to charge/discharge a part of power running power or regenerative power of the motor to/from the power storage apparatus. The converter apparatus includes a converter control unit that generates, based on a regeneration state signal as a signal indicating a suppression state of the regenerative power or regenerative torque or regenerative current equivalent to the regenerative power, a charging current command value, generates a charging and discharging current command value of the converter apparatus based on the charging current command value, and performs control.

Abstract: An object is to provide a magnetic-pole position detection apparatus for synchronous machines that allows a desired accuracy of magnetic-pole position detection regardless of variation in DC voltage of a DC voltage source. Calculation means (2a) changes a pulse width (tp) and a pulse-quiescent width (tn) in accordance with a DC voltage detection value (Vdc), using a pulse width determination section (22a), such that a desired accuracy of magnetic-pole position detection can be obtained regardless of variation in DC voltage of a DC voltage source (5). The calculation means (2a) also performs control such that a sampling timing is fixed at the end point of the pulse width (tp) of voltage vectors regardless of the DC voltage detection value (Vdc).

Abstract: A power conversion device formed of a converter for rectifying a single-phase AC voltage to a DC voltage and an inverter for driving an AC motor by converting the DC voltage to an AC voltage includes: a first compensation unit that uses a frequency component twice the frequency of the single-phase AC voltage with respect to the DC voltage outputted from the converter or a current outputted from the inverter as a compensation value for at least one of a torque command value, a current command value, a voltage command value, a frequency command value, and a phase angle command value; and a second compensation unit that uses the DC voltage outputted from the converter or a current outputted from the inverter after being subjected to low frequency cut-off processing and gain processing.

Abstract: A battery internal state estimation apparatus including: an internal state estimation unit, which inputs at least one of measured values obtained by a battery measurement unit at preset sampling intervals including a current flowing through a battery, an inter-terminal voltage, a temperature of the battery, and an ambient air temperature, for estimating, based on the measured values, at least one of a state of charge, internal temperature, capacity, and internal resistance of the battery as an internal state of the battery; and an internal state correction unit for correcting estimated values of the internal state obtained by the internal state estimation unit so that the estimated values are not contradictory at least to qualitative properties of the battery, and outputting the corrected values to an output unit.

Abstract: A hybrid-vehicle power generator control apparatus. Based on a difference electric power value, which corresponds to the difference between an electric power generator power command value given by a higher-hierarchy control unit and an output voltage value of an electric power generator, an electric power generator control unit calculates an electric power generator rotation speed command value and based on the calculated electric power generator rotation speed command value, the electric power generator control unit PWM-controls an output of the electric-power conversion system that performs electric conversion between the electric power generator and a battery, so that the rotation speed of the electric power generator is made to keep track of the electric power generator rotation speed command value and the output electric power value of the electric power generator is made to keep track of the electric power generator power command value.

Abstract: An electric vehicle control apparatus includes a plurality of current collectors that take in electric power from an outside, a convertor unit that converts a voltage input through the current collectors into a direct current having a predetermined value, and a power storage unit connected to and charged and discharged by the convertor unit. The convertor unit includes a convertor circuit and a control unit. The control unit includes a current adjusting unit that generates a current command which is a command for an electric current of the convertor circuit, and adjusts the magnitude of the current command on the basis of a current collector state signal. The control unit further includes a current control unit that controls the electric current of the convertor circuit on the basis of the current command.

Abstract: A current command generator 117 generates a current command that indicates a value of current supplied from an inverter circuit to electric motors connected in parallel with the inverter circuit. A voltage command calculator 120 generates a voltage compensation signal for compensating a difference between a value of actual current supplied to each of the electric motors and a value of current indicated by the current command. A determiner 135 determines, based on a value obtained from the voltage compensation signal, whether or not an abnormality is occurring in at least one of the electric motors. A shutdown controller 136 shuts down, upon the determiner 135 determining that an abnormality is occurring, the power supply from the inverter circuit to the each of the electric motors.

Abstract: When a continuous short circuit occurs between both terminals of a battery pack, fault, destruction and rupture of the battery can occur. Further, when a momentary short circuit occurs, a user may continue to use, without knowing thermal and electrical damage to the batteries, and reliability for the batteries is impaired, To overcome the problem, in a battery pack configured by connecting a plurality of storage batteries in series, at least one first storage battery is included which has a low capacity compared to second storage batteries during high-rate discharge, and the first storage battery undergoes polarity inversion during external short circuit, thereby preventing the other batteries from becoming damaged. There are also included a detector that detects voltage of the first storage battery, and a fault signal generator that generates an output fault signal when a voltage detected by the detector inverses.