Abstract: A power supply circuit includes PCU switches provided in respective positive wires of a first power source conduction path and a second power source conduction path which connect a first generator respectively to a first power transmission bus and a second power transmission bus, and further includes power transmission bus switches provided in respective negative wires of a first load conduction path and a second load conduction path which connect respectively the first power transmission bus and the second power transmission bus to a first load.

Abstract: A power supply circuit supplies power from a first battery to a first load. The first load includes a capacitor that needs to be charged before activation. The power supply circuit includes: a main circuit that supplies power from the first battery to the first load; and a backup circuit having a precharge circuit for charging the capacitor and that supplies power from the first battery to the first load. When charging the capacitor, power is supplied from the first battery to the first load by using the backup circuit. After charging of the capacitor is completed, power is supplied from the first battery to the first load by using the main circuit.

Abstract: A power supply circuit includes a load cable connecting a first battery and a first load; a load cable connecting a second battery and a second load; a transistor provided between a first generator and the load cable; and a transistor provided between the first generator and the load cable, wherein the transistors are turned OFF in a case where power is to be supplied from the first generator to the first load and second load.

Abstract: A power supply circuit of an aircraft includes: a first power transmission path and a second power transmission path each configured to supply electric power from power generation units to one or more drive modules; and a third power transmission path configured to supply electric power from a charging device to the first power transmission path. When one or more batteries are charged with the electric power supplied from the charging device, the electric power is supplied from the charging device to the batteries via the first power transmission path, and the electric power is supplied from the charging device to the batteries via the second power transmission path.

Abstract: A power supply circuit of an aircraft includes: a first contactor that is provided on a first power transmission path for transmitting electric power from a first power source to a load and switches between a conduction state and an interruption state between the first power source and the load; and a second contactor that is provided on a second power transmission path for transmitting electric power from a second power source to the load and switches between the conduction state and the interruption state between the second power source and the load. The first contactor includes a first fixed contact and a first movable contact, and the second contactor includes a second fixed contact and a second movable contact. The moving direction of the first movable contact intersects with the moving direction of the second movable contact.

Abstract: A power supply circuit of an aircraft includes: a first power transmission path for transmitting electric power from each of a first main power source device and a second main power source device to a first load device and a second load device; a first current sensor; a second current sensor; a third current sensor; and a fourth current sensor, and determines whether an abnormality has occurred based on currents detected by the first current sensor, the second current sensor, the third current sensor and the fourth current sensor.

Abstract: A power supply circuit sets a precharge current flowing through a first load device and a precharge current flowing through a second load device during charging to a first allowable current or less, thereafter sets the precharge current flowing through the first load device to the first allowable current or less, sets the precharge current flowing through the second load device to the second allowable current or less, and sets a maximum value of the precharge current flowing through the second load device to be larger than the first allowable current.

Abstract: A power supply circuit sets a precharge current flowing through a first load device and a precharge current flowing through a second load device during charging to a first allowable current or less, thereafter sets the precharge current flowing through the first load device to the first allowable current or less, sets the precharge current flowing through the second load device to the second allowable current or less, and sets a maximum value of the precharge current flowing through the second load device to be larger than the first allowable current.

Abstract: A power supply circuit includes a load cable connecting a first battery and a first load; a load cable connecting a second battery and a second load; a transistor provided between a first generator and the load cable; and a transistor provided between the first generator and the load cable, wherein the transistors are turned OFF in a case where power is to be supplied from the first generator to the first load and second load.

Abstract: A power supply circuit includes PCU switches provided in respective positive wires of a first power source conduction path and a second power source conduction path which connect a first generator respectively to a first power transmission bus and a second power transmission bus, and further includes power transmission bus switches provided in respective negative wires of a first load conduction path and a second load conduction path which connect respectively the first power transmission bus and the second power transmission bus to a first load.

Abstract: A power supply circuit supplies power from a first battery to a first load. The first load includes a capacitor that needs to be charged before activation. The power supply circuit includes: a main circuit that supplies power from the first battery to the first load; and a backup circuit having a precharge circuit for charging the capacitor and that supplies power from the first battery to the first load. When charging the capacitor, power is supplied from the first battery to the first load by using the backup circuit. After charging of the capacitor is completed, power is supplied from the first battery to the first load by using the main circuit.

Abstract: In a power supply circuit in which a plurality of loads are connected in parallel to a common power source and load switches are provided for the respective loads, an abnormality determination unit determines which load switch has an abnormality among the plurality of load switches, based on time change of a potential difference acquired after a switch operation unit switches each load switch from OFF to ON.

Abstract: A short-circuit protection method for a circuit having a plurality of power switching elements, includes, when a short-circuit of a first power switching element is detected by detection device that detects a short-circuit of the plurality of power switching elements, performing a cut-off process of cutting off a gate of a second power switching element through which a short-circuit current caused by the short-circuit of the first power switching element flows, and changing a resistance value of a gate resistor of the second power switching element while the cut-off process is performed.

Abstract: Provided is a switching circuit including an arm having two switching elements connected. The switching elements are SiC semiconductors, and when a commutation current flows to the reverse conducting element, the switching element having the reverse conducting element connected in parallel thereto is turned on.

Abstract: The invention provides a resonant inverter apparatus that allows making the number of sensors small and reducing the cost.

Abstract: A resonant inverter circuit is provided which can be made lighter in weight and smaller in capacity. With a main circuit in steady mode, IGBT of an auxiliary circuit are controlled and the energy of an electric current is stored in a resonant inductance. Next, snubber capacitors are charged and discharged by means of an electric current. At this time, the voltages across both terminals of IGBT corresponding with the snubber capacitors being charged becomes zero, and ZVS is achieved. Furthermore, when the snubber capacitors being discharged have been completely discharged, and free wheeling diodes and IGBT corresponding with these snubber capacitors conduct, both the voltages across both terminals of the IGBT and the electric current become zero and ZVS and ZCS are achieved.

Abstract: An inverter control apparatus is provided which controls a resonant soft switching inverter circuit according to the operational principle that the number of the resonant inductors be reduced. When the three phase control signal of the control CPU 5 changes from the (1, 0, 0) state to (0, 0, 1), the drive signal generating device 6 causes a current to flow to the inductor Lr by making the auxiliary switching elements conductive, and when the current I4 flowing to the inductor Lr is the same as the maximum among the currents I1, I2, and I3 flowing through the load, turns OFF the IGBT Q1 and IGBT Q6.

Abstract: The invention provides a resonant inverter apparatus that allows making the number of sensors small and reducing the cost.

Abstract: An inverter control apparatus is provided which controls a resonant soft switching inverter circuit according to the operational principle that the number of the resonant inductors be reduced. When the three phase control signal of the control CPU 5 changes from the (1, 0, 0) state to (0, 0, 1), the drive signal generating device 6 causes a current to flow to the inductor Lr by making the auxiliary switching elements conductive, and when the current I4 flowing to the inductor Lr is the same as the maximum among the currents I1, I2, and I3 flowing through the load, turns OFF the IGBT Q1 and IGBT Q6.

Abstract: A resonant inverter circuit is provided which can be made lighter in weight and smaller in capacity. With a main circuit in steady mode, IGBT of an auxiliary circuit are controlled and the energy of an electric current is stored in a resonant inductance. Next, snubber capacitors are charged and discharged by means of an electric current. At this time, the voltages across both terminals of IGBT corresponding with the snubber capacitors being charged becomes zero, and ZVS is achieved. Furthermore, when the snubber capacitors being discharged have been completely discharged, and free wheeling diodes and IGBT corresponding with these snubber capacitors conduct, both the voltages across both terminals of the IGBT and the electric current become zero and ZVS and ZCS are achieved.