Abstract: A power conversion device that includes an inverter circuit in which arms are connected in parallel to each other between a DC positive terminal and a DC negative terminal in accordance with a number of phases of alternating currents of a plurality of phases, the arms for the respective phases each including two switch sections that are connected in series and to be brought into conduction in an on state and out of conduction in an off state, the power conversion device being configured to convert electric power between DC power and AC power of the plurality of phases while a connection point between the two switch sections of each of the arms is set as an AC input or output point of each phase.

Abstract: A rotating electrical machine control device with an electronic control unit that is programmed to: switch a modulation method between asynchronous modulation in which switching of the inverter is controlled by modulated pulses generated based on a carrier having a first carrier frequency which is not synchronous with rotation of the rotating electrical machine and synchronous modulation in which switching of the inverter is controlled by modulated pulses generated in synchronization with rotation of the rotating electrical machine, the switching of the modulation method between the asynchronous modulation and the synchronous modulation being performed according to an operating condition of the rotating electrical machine which includes at least a rotational speed of the rotating electrical machine.

Abstract: An inverter control device for controlling a rotating electric machine drive device that drives an alternating current rotating electric machine and includes an inverter and a DC link capacitor, the inverter being connected to a DC power supply via a contactor, being connected to the rotating electric machine, and performing power conversion between direct current and three-phase alternating current, the DC link capacitor smoothing a DC link voltage, which is a DC-side voltage of the inverter, and the inverter control device performing switching control on switching elements that form the inverter.

Abstract: The magnetic pole position of a rotary electric machine is electrically derived accurately by reducing a voltage error due to a dead time while suppressing the influence on the operation efficiency of the rotary electric machine. A control device performs dead-time compensation, and performs current feedback control in a d-q-axis vector coordinate system using a magnetic pole position computed on the basis of an induced voltage produced by rotation of a rotor or on the basis of a response component to a high-frequency observation signal applied to the rotary electric machine. In the case where the rotary electric machine is controlled by deciding current commands Id*, Iq* in the d-q-axis vector coordinate system, the rotary electric machine control device controls the rotary electric machine such that the magnitude of an armature current Ia becomes equal to or more than a lower-limit current Ia_min prescribed in advance.

Abstract: A rotating electrical machine control device where the changeover control circuit switches the source of electric power for the electronic control unit when the electric power that is supplied from the second DC power supply to the electronic control unit becomes equal to or lower than a predetermined first reference value and electric power that is output from the backup power supply is equal to or higher than a predetermined second reference value, and the electronic control unit uses the electric power supplied from the backup power supply to cause the inverter to perform the switching operation to perform fail-safe control.

Abstract: A rotating electrical machine control device with an electronic control unit that is programmed to: switch a modulation method between asynchronous modulation in which switching of the inverter is controlled by modulated pulses generated based on a carrier having a first carrier frequency which is not synchronous with rotation of the rotating electrical machine and synchronous modulation in which switching of the inverter is controlled by modulated pulses generated in synchronization with rotation of the rotating electrical machine, the switching of the modulation method between the asynchronous modulation and the synchronous modulation being performed according to an operating condition of the rotating electrical machine which includes at least a rotational speed of the rotating electrical machine.

Abstract: An inverter control device for controlling a rotating electric machine drive device that includes an inverter and a DC link capacitor, the inverter being connected to a DC power supply via a contactor, being connected to an alternating current rotating electric machine, and performing power conversion between direct current and three-phase alternating current, an arm for each alternating current phase being formed by a series circuit including an upper side switching element and a lower side switching element, and the DC link capacitor smoothing a DC link voltage, which is a DC-side voltage of the inverter, the inverter control device performing switching control on the switching elements that form the inverter.

Abstract: A rotating electrical machine control device where the changeover control circuit switches the source of electric power for the electronic control unit when the electric power that is supplied from the second DC power supply to the electronic control unit becomes equal to or lower than a predetermined first reference value and electric power that is output from the backup power supply is equal to or higher than a predetermined second reference value, and the electronic control unit uses the electric power supplied from the backup power supply to cause the inverter o perform the switching operation to perform fail-safe control.

Abstract: An inverter control device that controls a rotary electric machine drive device that includes an inverter with a plurality of switching elements, where the active short circuit control is executed in a high rotational speed region, and the shut-down control is executed in a low rotational speed region, which is on a low rotational speed side with respect to the high rotational speed region, in accordance with at least a rotational speed of the rotary electric machine.

Abstract: The magnetic pole position of a rotary electric machine is electrically derived accurately by reducing a voltage error due to a dead time while suppressing the influence on the operation efficiency of the rotary electric machine. A control device performs dead-time compensation, and performs current feedback control in a d-q-axis vector coordinate system using a magnetic pole position computed on the basis of an induced voltage produced by rotation of a rotor or on the basis of a response component to a high-frequency observation signal applied to the rotary electric machine. In the case where the rotary electric machine is controlled by deciding current commands Id*, Iq* in the d-q-axis vector coordinate system, the rotary electric machine control device controls the rotary electric machine such that the magnitude of an armature current Ia becomes equal to or more than a lower-limit current Ia_min prescribed in advance.

Abstract: An inverter control device for controlling a rotating electric machine drive device that includes an inverter and a DC link capacitor, the inverter being connected to a DC power supply via a contactor, being connected to an alternating current rotating electric machine, and performing power conversion between direct current and three-phase alternating current, an arm for each alternating current phase being formed by a series circuit including an upper side switching element and a lower side switching element, and the DC link capacitor smoothing a DC link voltage, which is a DC-side voltage of the inverter, the inverter control device performing switching control on the switching elements that form the inverter.

Abstract: An inverter control device for controlling a rotating electric machine drive device that drives an alternating current rotating electric machine and includes an inverter and a DC link capacitor, the inverter being connected to a DC power supply via a contactor, being connected to the rotating electric machine, and performing power conversion between direct current and three-phase alternating current, the DC link capacitor smoothing a DC link voltage, which is a DC-side voltage of the inverter, and the inverter control device performing switching control on switching elements that form the inverter.

Abstract: A rotary electric machine driving device that drives and controls an alternating-current rotary electric machine, the rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; and an inverter control unit that controls switching of a switching element of the inverter according to a predefined switching frequency.

Abstract: A rotary electric machine driving device that drives and controls an alternating-current rotary electric machine, the rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; and an inverter control unit that controls switching of a switching element of the inverter according to a predefined switching frequency.

Abstract: A rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; an inverter control unit that controls switching of a switching element of the inverter according to a predetermined switching frequency; and an inductance control unit that switches a direct-current side inductance between a positive pole of the direct-current power supply and a positive pole of the smoothing capacitor, according to the switching frequency, between a predefined standard inductance and a high inductance that is higher than the standard inductance.

Abstract: A rotary electric machine control device that controls a rotary electric machine that includes a rotor in which a permanent magnet is disposed so as to provide magnetic saliency, and that performs feedback control on the rotary electric machine on the basis of a deviation between a current command and a feedback current from the rotary electric machine in a d-q-axis vector coordinate system defined by a d-axis which extends in a direction of a magnetic field produced by the permanent magnet and a q-axis which is orthogonal to the d-axis.

Abstract: A current detector that detects, based on output signals of N coreless current sensors, where N is a natural number of 3 or more, currents flowing in N conductors in a circuit connected so that the sum of the currents flowing in the N conductors becomes zero. The current detector has a signal-current correlation acquiring section that acquires a signal-current correlation representing a correlation between the output signals of the N coreless current sensors and the currents flowing in the N conductors. Furthermore, a current calculating section that calculates the currents flowing in the N conductors based on the output signals of all the N coreless current sensors by using the signal-current correlation.

Abstract: A rotary electric machine driving device that drives and controls an alternating-current rotary electric machine, the rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; and an inverter control unit that controls switching of a switching element of the inverter according to a predefined switching frequency.

Abstract: A rotary electric machine driving device that drives and controls an alternating-current rotary electric machine, the rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; and an inverter control unit that controls switching of a switching element of the inverter according to a predefined switching frequency.

Abstract: A rotary electric machine control device that controls a rotary electric machine that includes a rotor in which a permanent magnet is disposed so as to provide magnetic saliency, and that performs feedback control on the rotary electric machine on the basis of a deviation between a current command and a feedback current from the rotary electric machine in a d-q-axis vector coordinate system defined by a d-axis which extends in a direction of a magnetic field produced by the permanent magnet and a q-axis which is orthogonal to the d-axis.