Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Masayoshi Hirota

Keiji Tashiro

Tatsuya Izumi

Takafumi Kawakami

Hideyuki Kuboki

Kazushi Kusawake

Takahiro Sunaga

Xiaoguang Zheng

Seiya Miyata

Yusuke Okagawa

An electric device includes a case, a circuit substrate that is disposed in the case, and electronic components that are disposed in the case, and generate heat when energized. The case is filled with a liquid insulating-and-cooling medium, the circuit substrate is disposed in an orientation in which the normal lines of the substrate surfaces that are the plate surfaces of the circuit substrate are horizontal, the electronic components are disposed on the lower side of the case, and at least some of the electronic components are immersed in the liquid insulating-and-cooling medium.

Electric device with immersed electronic components and elongated busbar forming an upward flow

A power source system includes a plurality of output circuits electrically connected to a plurality of second coils on a second side of a transformer unit, and a selection circuit to which power is supplied from the plurality of output circuits. Each of the plurality of output circuits is electrically connected to each of the plurality of second coils on the second side, and outputs DC power to the selection circuit based on AC power of the second coil on the second side. The selection circuit selects a supply destination of the power from a first conductive path and a second conductive path.

Power source system

Provided is a power source system that can more easily realize a configuration that can support a plurality of charging methods and supply a relatively high voltage and a relatively low voltage based on power from a battery. A power source system is a system that is to be installed in a vehicle including a travel motor, and into which a charging current flows via a charging path when receiving supply of power from an external apparatus provided external to the vehicle. The power source system includes a first conductive path and a second conductive path that are electrically connected to the charging path and branch from the charging path, a first relay that is provided on the first conductive path, and a first DC/DC converter that performs voltage conversion.

A semiconductor switch driving apparatus is configured to drive a semiconductor switch, the semiconductor switch not having a body diode and having a threshold voltage for performing switching between off and on lower than a threshold voltage of a silicon device. The semiconductor switch driving apparatus includes: a first drive voltage switching circuit configured to switch a drive voltage of the semiconductor switch to a first adjustment voltage between an off-voltage and an on-voltage, at a predetermined time immediately before a timing at which the semiconductor switch is driven from off to on; and a second drive voltage switching circuit configured to switch, after the drive voltage of the semiconductor switch has been switched by the first drive voltage switching circuit, the drive voltage of the semiconductor switch to the on-voltage at the timing at which the semiconductor switch is driven from off to on.

Driving apparatus and driving method for semiconductor switch, power conversion apparatus, and vehicle

A coil component used for two-phase transformer coupling includes: a first coil and a second coil; and a magnetic core at which the first coil and the second coil are provided. The magnetic core includes: a first magnetic leg at which the first coil is provided; a second magnetic leg at which the second coil is provided; a central leg portion interposed between the first magnetic leg and the second magnetic leg; a pair of connection portions connecting the first magnetic leg, the central leg portion, and the second magnetic leg in parallel; a main gap interposed in the central leg portion; a first gap interposed in the first magnetic leg; and a second gap interposed in the second magnetic leg. A coupling coefficient between the first coil and the second coil is not less than 0.7.

Coil component, circuit board, and power supply device

The electronic circuit device is provided with: a power conversion circuit having a switching element incorporated therein; and a circuit substrate on which a circuit element constituting the power conversion circuit is mounted and a wiring pattern configured to electrically connect circuit elements is disposed. The power conversion circuit is composed of a pair of switching elements configured to supply energy to a choke coil intermittently in phase. The circuit substrate is constituted of a double-sided substrate in which one switching element is mounted on one main surface while the other switching element is mounted on the other main surface and a wiring pattern is provided in a manner such that a current path including one switching element and a current path including the other switching element overlap each other in plan view and have opposite current directions.

Electronic circuit device

A power supply device comprises: a first switching circuit that includes a series circuit, connected between a predetermined voltage level and a ground level, having a high side switching element and a low side switching element connected in series that are alternately turned on and off at a predetermined frequency; a second switching circuit that includes a switching element controlled between on and off, the switching element having one end being connected to the ground level, and that makes an ON time point of the switching element variable; and a control unit that performs control such that ON time points of the switching element and the high side switching element are not overlapped with each other.

Power supply device

A converter comprises: a preceding converter having a first switching circuit intermittently outputting current; a capacitor smoothing the current output from the first switching circuit; and a succeeding converter having a second switching circuit to which the current smoothed by the capacitor is intermittently input. The converter converts direct current or alternating current input to the preceding converter and outputs the converted direct current or alternating current from the succeeding converter. A control circuit controls switching of the first and second switching circuits so that an end time point of an output period during which current is output from the first switching circuit has a time difference with a start time point of an input period during which current is input to the second switching circuit.

Converter and control circuit

Provided are a control unit having a first control state in which a first switching element and a second switching element of one series circuit are turned on and a second control state to which the first control state shifts and in which a first switching element of another series circuit and the second switching element of the one series circuit are turned on, and executing control so as to apply predetermined voltage to the other side of a transformer during a predetermined time period during the first control state before shifting to the second control state.

Power conversion apparatus and control method for power conversion apparatus

Provided is a DC-AC conversion device capable of reducing ripple current output from a battery. A DC-AC conversion device, including a DC-DC conversion circuit having a full bridge circuit, a DC-AC conversion circuit converting DC voltage output from the DC-DC conversion circuit into AC voltage, a coil with one end connected to one DC terminal of the DC-DC conversion circuit, and a capacitor connected between the other end of the coil and the other DC terminal, comprises: a short-circuit control part controlling switching so that a leg of the full bridge circuit is temporarily short-circuited; a phase reverse control part controlling switching of the full bridge circuit so that a phase of AC voltage output from the full bridge circuit is reversed, after the leg of the full bridge circuit is temporarily short-circuited; and a short-circuit duration variation part varying a duration for which the leg of the full bridge circuit is short-circuited at a specific cycle according to a cycle of AC voltage output from the DC-AC conversion circuit.

DC-AC conversion device, control circuit controlling operation of DC-AC conversion device, and control method for controlling operation of DC-AC conversion device

Growing community of inventors

Osaka, Japan

Masayoshi Hirota