Abstract: A power-supply-side coil receives an alternating current from an AC power source to produce a magnetic flux. A power-supply-side capacitor is connected in parallel with the power-supply-side coil. A power-supply-side filter circuit includes a reactor and a capacitor, which are connected in series between the AC power source and the power-supply-side coil. A power-receiving-side coil is interlinked with a magnetic flux produced by the power-supply-side coil to produce an alternating current. The power-supply-side filter circuit, the power-supply-side capacitor, and the power-supply-side form a circuit having an impedance having a frequency characteristic, in which a frequency of a minimum point formed on a high-frequency side relative to a maximum point is greater than a frequency of a fundamental wave of an alternating current supplied from the AC power source and is less than a frequency of a third order wave of the fundamental wave.

Abstract: In a signal and power transmission system, a primary coil and a secondary coil magnetically coupled to the primary coil and connected to an electrical path are provided. An encoder encodes a target signal to be transmitted to produce a pulse code signal, and a voltage applying unit applies a voltage signal based on the pulse code signal to the primary coil as an input voltage signal. A decoder decodes an output voltage signal induced in the secondary coil using a variation in the output voltage signal into a decoded signal corresponding to the target signal. The output voltage signal is induced in the secondary coil based on the input voltage signal. A rectifier rectifies a current flowing through the electrical path connected to the secondary coil according to the output voltage signal induced in the secondary coil, thus outputting a rectified current as power.

Abstract: An AC line filter is connected to an enclosure serving as a ground. A power transmission unit is configured to transmit electric power to a power reception device in a contactless manner. An inverter is provided between the AC line filter and the power transmission unit. A common mode filter is provided between the inverter and the power transmission unit. A Y capacitor of the common mode filter is not connected to the enclosure, but is connected to a power line between the AC line filter and the inverter.

Abstract: A contactless power supply system for transferring power without contact between a primary side coil and a secondary side coil is provided. In the contactless power supply system, a manipulation unit manipulates a secondary side converter so that power outputted to a load is controlled to be a command value. The manipulation unit manipulates an input voltage of a primary side resonance circuit so that a current flowing in the primary side resonance circuit equals a product of a current flowing in the secondary side resonance circuit and a current coefficient. The current coefficient is defined as a square root of a specific value and the specific value is an equivalent resistance of the secondary side resonance circuit divided by an equivalent resistance of the primary side resonance circuit.

Abstract: A non-contact power supply apparatus includes a transmission-side pad, a transmission-side resonant circuit, a reception-side pad, a reception-side resonant circuit, a power transmission circuit, a power reception circuit, and a control circuit. The control circuit controls an alternating-current voltage supplied to the transmission-side pad and an alternating-current voltage supplied to the power reception circuit, so that a power factor of the alternating current supplied from the power transmission circuit to the transmission-side pad connected to the transmission-side resonant circuit and direct-current power supplied from the power supply circuit to an on-board battery are respectively set to target values. As a result, change in power factor can be suppressed even when the coupling coefficient of the transmission-side pad and the reception-side pad changes, and predetermined electric power can be transmitted.

Abstract: A magnetic component includes a plurality of coils, a magnetic core, and a shield. The coils form at least one of a primary coil and a secondary coil to which a voltage corresponding to a voltage induced to the primary coil is induced. The magnetic core penetrates through the coils. The shield is disposed at least one of between different coils in the coils and between one or more of the coils and the magnetic core. Each of the coils and the shield are respectively pattern-formed on substrates. Each of the coils and the shield have a stacking structure.

Abstract: A power-supply-side coil receives an alternating current from an AC power source to produce a magnetic flux. A power-supply-side capacitor is connected in parallel with the power-supply-side coil. A power-supply-side filter circuit includes a reactor and a capacitor, which are connected in series between the AC power source and the power-supply-side coil. A power-receiving-side coil is interlinked with a magnetic flux produced by the power-supply-side coil to produce an alternating current. The power-supply-side filter circuit, the power-supply-side capacitor, and the power-supply-side form a circuit having an impedance having a frequency characteristic, in which a frequency of a minimum point formed on a high-frequency side relative to a maximum point is greater than a frequency of a fundamental wave of an alternating current supplied from the AC power source and is less than a frequency of a third order wave of the fundamental wave.

Abstract: Comparators of a rotary electric machine control apparatus acquire terminal voltages of each phase, which are developed at junction points between high-potential side FETs and low-potential side FETs, respectively. In switching over ON and OFF of the high-potential side FETs and the low-potential side FETs, a control unit determines a flow direction of a phase current supplied to each phase coil based on a terminal voltage developed in a dead time period, in which a the high-potential side FET and the low-potential side FET forming a pair are both turned off. Thus, the flow direction of each phase current is determined in a simple configuration.

Abstract: A switching module includes a series-connected unit of a first flowing restriction element and a second flowing restriction element, the first flowing restriction element having an opening and closing function of opening and closing a flowing path of current, and the second flowing restriction element having at least one of a rectifying function of restricting the direction in which current flows and the opening and closing function, and a snubber circuit connected to the series-connected unit in parallel. A first wiring line connecting between the first flowing restriction element and the snubber circuit, a second wiring line connecting between the second flowing restriction element and the snubber circuit, a third wiring line connecting between the first flowing restriction element and the second flowing restriction element, the first flowing restriction element, the second flowing restriction element, and the snubber circuit are formed substantially integrally with each other by using an insulator.

Abstract: A switching device includes a flowing restriction element, a conductor and a snubber resistor. The flowing restriction element has an opening and closing function to open and close a flowing path of an electric current. The conductor is connected to the flowing restriction element. The snubber resistor is connected to the flowing restriction element and constitutes a snubber circuit. The snubber resistor is disposed along the conductor.

Abstract: A switching device includes a plurality of semiconductor switching elements coupled in series, a smoothing capacitor, and snubber circuit. Each of the semiconductor switching elements includes a free wheel diode. The smoothing capacitor is coupled in parallel with a direct current power source and the semiconductor switching elements. The smoothing capacitor smoothes an output of the direct current power source and supplies the smoothed output to the semiconductor switching elements. The snubber circuit is coupled between a first connecting point and a second connecting point in parallel with the semiconductor switching elements. An inductance of a first channel provided from the first connecting point to the second connecting point through the smoothing capacitor is equal to or more than 10 times as large as an inductance of a second channel including the semiconductor switching elements and the snubber circuit.

Abstract: A switching device includes a flowing restriction element, a conductor and a snubber resistor. The flowing restriction element has an opening and closing function to open and close a flowing path of an electric current. The conductor is connected to the flowing restriction element. The snubber resistor is connected to the flowing restriction element and constitutes a snubber circuit. The snubber resistor is disposed along the conductor.

Abstract: A switching module includes a series-connected unit of a first flowing restriction element and a second flowing restriction element, the first flowing restriction element having an opening and closing function of opening and closing a flowing path of current, and the second flowing restriction element having at least one of a rectifying function of restricting the direction in which current flows and the opening and closing function, and a snubber circuit connected to the series-connected unit in parallel. A first wiring line connecting between the first flowing restriction element and the snubber circuit, a second wiring line connecting between the second flowing restriction element and the snubber circuit, a third wiring line connecting between the first flowing restriction element and the second flowing restriction element, the first flowing restriction element, the second flowing restriction element, and the snubber circuit are formed substantially integrally with each other by using an insulator.

Abstract: To ensure that an energy supply operation can be performed safely and smoothly on a vehicle having a plurality of energy ports such as a charging port, charging ports for supplying electric energy to a high voltage battery and a fuel supply port for supplying fuel to a fuel tank are provided in a vehicle body as energy supply ports. The fuel supply port and charging ports are respectively provided with lid members that are switched between a closed state and an open state by respective lock mechanisms. When closure of one lid member is released, all of the other lid members are prohibited from being switched to the open state, and therefore the number of energy supply ports having an open lid member is limited to one.

Abstract: A switching device includes a plurality of semiconductor switching elements coupled in series, a smoothing capacitor, and snubber circuit. Each of the semiconductor switching elements includes a free wheel diode. The smoothing capacitor is coupled in parallel with a direct current power source and the semiconductor switching elements. The smoothing capacitor smoothes an output of the direct current power source and supplies the smoothed output to the semiconductor switching elements. The snubber circuit is coupled between a first connecting point and a second connecting point in parallel with the semiconductor switching elements. An inductance of a first channel provided from the first connecting point to the second connecting point through the smoothing capacitor is equal to or more than 10 times as large as an inductance of a second channel including the semiconductor switching elements and the snubber circuit.

Abstract: To ensure that an energy supply operation can be performed safely and smoothly on a vehicle having a plurality of energy ports such as a charging port, charging ports for supplying electric energy to a high voltage battery and a fuel supply port for supplying fuel to a fuel tank are provided in a vehicle body as energy supply ports. The fuel supply port and charging ports are respectively provided with lid members that are switched between a closed state and an open state by respective lock mechanisms. When closure of one lid member is released, all of the other lid members are prohibited from being switched to the open state, and therefore the number of energy supply ports having an open lid member is limited to one.