Abstract: An in-vehicle charging device that includes an AC-DC converter that converts power between AC power on the external AC power supply side and first DC power; and a DC-DC converter that converts power between the first DC power and second DC power on the DC power supply side, wherein the AC-DC converter includes a current source active rectifier having a power factor correct function, the DC-DC converter includes a chopper circuit including a reactor disposed on the AC-DC converter side and a half-bridge circuit disposed on the DC power supply side, the reactor is configured using a plurality of the coils, the half-bridge circuit is configured using the inverter, and the current source active rectifier includes a bidirectional switching device.

Abstract: An in-vehicle charging device that includes an AC-DC converter that converts power between AC power on the external AC power supply side and first DC power on the first DC power supply side, and converts power between AC power on the external AC power supply side and second DC power on the second DC power supply side, wherein the AC-DC converter is a triple active bridge circuit including: a transformer including a primary-side coil, a secondary-side first coil, and a secondary-side second coil; a primary-side bridge circuit connected to the primary-side coil; a secondary-side first bridge circuit connected to the secondary-side first coil; and a secondary-side second bridge circuit connected to the secondary-side second coil, and the primary-side bridge circuit includes a bidirectional switching device.

Abstract: An in-vehicle charging device charges a vehicle driving device DC power supply including: a rotating electrical machine including coils of multiple phases connected at a neutral point, and serving as a driving power source of a wheel; an inverter converting power between direct and alternating currents of multiple phases; and the DC power supply connected to the inverter, the in-vehicle charging device including: an AC-DC converter converts power between AC power and first DC power; an active decoupling circuit that includes the inverter, the coils of multiple phases, and an output capacitor, and generates second DC power for charging the DC power supply from the first DC power, in which a DC side terminal of the AC-DC converter and a DC side terminal of the inverter are connected without another passive component, and the output capacitor is connected between the neutral point of the coils and a DC negative electrode.

Abstract: An in-vehicle charging device that includes a first circuit configured to include the excitation circuit and convert power between AC power on an external AC power supply side and first DC power; and a second circuit configured to include the inverter, the multi-phase stator coils, and an output capacitor, and generate second DC power for charging the DC power supply from the first DC power, wherein the output capacitor is connected between the neutral point of the multi-phase stator coils and a DC negative electrode.

Abstract: A rotating electrical machine includes a DC power supply; a rotating electrical machine; an inverter provided between the DC power supply and the rotating electrical machine to control current flowing in the rotating electrical machine; and a control device that: determines a rotational speed as a rotational speed requested for the rotating electrical machine and a requested torque as a torque requested for the rotating electrical machine; and limits a torque of the rotating electrical machine. The inverter is operated based on the rotational speed and the requested torque determined by the control device, and the control unit changes a limit of the torque in accordance with an inverter voltage which is a voltage applied to a frequency conversion portion provided in the inverter.

Abstract: A rotating electrical machine includes a DC power supply; a rotating electrical machine; an inverter provided between the DC power supply and the rotating electrical machine to control current flowing in the rotating electrical machine; and a control device that: determines a rotational speed as a rotational speed requested for the rotating electrical machine and a requested torque as a torque requested for the rotating electrical machine; and limits a torque of the rotating electrical machine. The inverter is operated based on the rotational speed and the requested torque determined by the control device, and the control unit changes a limit of the torque in accordance with an inverter voltage which is a voltage applied to a frequency conversion portion provided in the inverter.

Abstract: In a device for removing inverter noise, a pair of bus bars extending in parallel are grounded via a pair of capacitors. The capacitors are connected to the bus bars and to a grounding terminal at positions symmetrical to the pair of bus bars. Therefore, the inductance components are balanced from the source of noise to the grounded point, and impedance components are decreased from the two bus bars to a point grounded through the capacitors, making it possible to effectively remove high-frequency noise on the DC bus line of the inverter without requiring a large amount of space.

Abstract: A process involves collecting data relating to a particular condition and parsing the data from an original set of variables into subsets. For each subset defined, Mahalanobis distances are computed for known normal and abnormal values and the square root of these Mahalanobis distances is computed. A multiple Mahalanobis distance is calculated based upon the square root of Mahalanobis distances. Signal to noise ratios are obtained for each run of an orthogonal array in order to identify important subsets. This process has applications in identifying important variables or combinations thereof from a large number of potential contributors to a condition. The multidimensional system is robust and performs predictive data analysis well even when there are incidences of multi-collinearity and variables with zero standard deviations in reference group or unit space.

Abstract: A device for detecting a motor drive current is arranged without substantially requiring additional space. The device for detecting a motor drive current, detects the currents of the phases flowing through the feeder lines that connect the motors to an inverter using a first bus bar for each of the phases arranged in parallel relative to each other and second bus bars extending from the ends of the first bus bars in a direction to intersect the axes of the first bus bar to which attached, by using magnetic field detector elements of each of the phases arranged near the feeder lines, wherein processing means for detecting the currents relying on the magnetic field detector elements of each of the phases are provided on a common circuit board. The magnetic field detector elements are disposed near the first bus bars of each of the phases, and the circuit board is arranged in a space sandwiched between the outermost first bus bars.

Abstract: In a device for removing inverter noise, a pair of bus bars extending in parallel are grounded via a pair of capacitors. The capacitors are connected to the bus bars and to a grounding terminal at positions symmetrical to the pair of bus bars. Therefore, the inductance components are balanced from the source of noise to the grounded point, and impedance components are decreased from the two bus bars to a point grounded through the capacitors, making it possible to effectively remove high-frequency noise on the DC bus line of the inverter without requiring a large amount of space.

Abstract: A device for detecting a motor drive current is arranged without substantially requiring additional space. The device for detecting a motor drive current, detects the currents of the phases flowing through the feeder lines that connect the motors to an inverter using a first bus bar for each of the phases arranged in parallel relative to each other and second bus bars extending from the ends of the first bus bars in a direction to intersect the axes of the first bus bar to which attached, by using magnetic field detector elements of each of the phases arranged near the feeder lines, wherein processing means for detecting the currents relying on the magnetic field detector elements of each of the phases are provided on a common circuit board. The magnetic field detector elements are disposed near the first bus bars of each of the phases, and the circuit board is arranged in a space sandwiched between the outermost first bus bars.

Abstract: A process involves collecting data relating to a particular condition and parsing the data from an original set of variables into subsets. For each subset defined, Mahalanobis distances are computed for known normal and abnormal values and the square root of these Mahalanobis distances is computed. A multiple Mahalanobis distance is calculated based upon the square root of Mahalanobis distances. Signal to noise ratios are obtained for each run of an orthogonal array in order to identify important subsets. This process has applications in identifying important variables or combinations thereof from a large number of potential contributors to a condition. The multidimensional system is robust and performs predictive data analysis well even when there are incidences of multi-collinearity and variables with zero standard deviations in reference group or unit space.

Abstract: A process involves collecting data relating to a particular condition and parsing the data from an original set of variables into subsets. For each subset defined, Mahalanobis distances are computed for known normal and abnormal values and the square root of these Mahalanobis distances is computed. A multiple Mahalanobis distance is calculated based upon the square root of Mahalanobis distances. Signal to noise ratios are obtained for each run of an orthogonal array in order to identify important subsets. This process has applications in identifying important variables or combinations thereof from a large number of potential contributors to a condition.