Abstract: A heat sink 7A is disposed on a circuit board, an air duct is disposed on the heat sink, external cooling air is supplied by the fan attached to the sink air inlet of the heat sink and the air duct inlet of the air duct. Cooling air flowing out of the air duct outlet of the air duct comes into contact with the magnetic component mounted on the circuit board.

Abstract: A DC-DC converter includes current resonant converter units connected in parallel. The converter units include respective control devices each of which includes a control circuit, a gate-pulse generating circuit, and the like. Taking into account a relational characteristic of a switching frequency and an output voltage of each of the converter unit, a lowest frequency as a common switching frequency, from among switching frequencies with respect to a same output voltage, is shared by the control circuits. The converter units are operated with drive pulses each of which is at the common switching frequency.

Abstract: A DC-DC converter includes current resonant converter units connected in parallel. The converter units include respective control devices each of which includes a control circuit, a gate-pulse generating circuit, and the like. Taking into account a relational characteristic of a switching frequency and an output voltage of each of the converter unit, a lowest frequency as a common switching frequency, from among switching frequencies with respect to a same output voltage, is shared by the control circuits. The converter units are operated with drive pulses each of which is at the common switching frequency.

Abstract: A battery charger is provided for charging the battery with the use of plural power converters, and the current balance control can be eliminated in the constant voltage charging operation. The battery charger includes the first to n-th power converters configured to convert the power supplied from the power supply and supply the converted power to the battery, and a charge controller configured to cause the power converters to perform a constant current charging operation, a constant power charging operation, and a constant voltage charging operation, to charge the battery. The charge controller causes the first to n-th power converters to operate in parallel in the constant current charging operation and the constant power charging operation, and causes one of the first to n-th power converters to solely operate in the constant voltage charging operation.

Abstract: A charger, in one possible configuration, has an AC/DC converter that converts alternating current power supplied from an external alternating current power supply into direct current power and outputs the direct current power, a DC/DC converter that transforms the direct current power output by the AC/DC converter and supplies the transformed direct current power to a vehicle-mounted battery, and a safety control unit that forcibly stops the DC/DC converter with detection of an occurrence of a fault during charging of the vehicle-mounted battery as a trigger, and subsequently causes the AC/DC converter to stop normally.

Abstract: A heat sink 7A is disposed on a circuit board, an air duct is disposed on the heat sink, external cooling air is supplied by the fan attached to the sink air inlet of the heat sink and the air duct inlet of the air duct. Cooling air flowing out of the air duct outlet of the air duct comes into contact with the magnetic component mounted on the circuit board.

Abstract: A motor drive device includes a bridge circuit 10 having a plurality of legs with switch elements 101 in upper and lower arms. High frequency AC voltage output from the bridge circuit 10, when it is connected to an AC power supply 1, is converted into a DC voltage via a transformer 21 and an AC/DC conversion circuit 11, thus charging the battery 2. Also, the DC voltage of the battery 2 is converted into an AC voltage by the bridge circuit 10 when the AC power supply 1 is cut off from the bridge circuit 10, and supplied to the alternating current motor 3. Because of this, the isolating transformer 21 can be driven at high frequency while the motor driving power conversion circuit is also used for battery charging, and a reduction in size and reduction in cost of the overall device are achieved.

Abstract: An electronic equipment cooling device is provided, which has housing in which heat-generating components are housed, and which can cool surfaces of the housing. A blower fan blows air toward the surfaces via a chamber room. An inclined flat plate-like partition portion is provided inside the chamber room so as to distribute a desired amount of air corresponding to a heat generating ratio of the respective surfaces.

Abstract: A power conversion device including: a chassis in which a heat sink is housed, and within which an upper space above the heat sink, a lower space below the heat sink, and a vertically continuous space that continues from a lower part to an upper part of the chassis are formed; a first substrate arranged from the lower space to the vertically continuous space, in which heat of a component mounted on the first substrate is transferred to the heat sink; a second substrate arranged in the upper space, in which heat of a component mounted on the second substrate is transferred to the heat sink; a wiring connecting the first substrate to the second substrate and passing through the vertically continuous space; and a tall electronic component taller than heights of the upper and lower spaces, that is mounted on the first substrate and arranged in the vertically continuous space.

Abstract: Provided is a cool air flow space in which cool air, that is generated by an inner fan disposed inside a housing, flows in the housing. An attachment member mounts a magnetic component on a bottom portion of the housing at a position within the cool air flow space. The attachment member includes a top plate and a pair of legs that extends downward from the top plate and that is fixed to the bottom portion.

Abstract: A cooling device includes a plurality of side wall fins formed on an outer surface of a first side wall of a housing, and a plurality of bottom fins formed on a bottom surface of a bottom portion of the housing. A cover member covers the side wall fins and bottom fins from an outer side to form side wall and bottom cooling channels. A chamber is provided that forms a fluid introduction chamber in a direction facing a second side wall so as to communicate with the side wall cooling channel and the bottom cooling channel. A coolant supply device is externally attached to the chamber so as to supply a coolant to the fluid introduction chamber. The side wall fins and the bottom fins are formed in predetermined shapes to adjust an amount of the coolant in the side wall cooling channel and the bottom cooling channel.

Abstract: A power conversion device including: a chassis in which a heat sink is housed, and within which an upper space above the heat sink, a lower space below the heat sink, and a vertically communicating space that communicates from a lower part to an upper part of the chassis are formed; a first substrate arranged from the lower space to the vertically communicating space, in which heat of a component mounted on the first substrate is transferred to the heat sink; a second substrate arranged in the upper space, in which heat of a component mounted on the second substrate is transferred to the heat sink; a wiring connecting the first substrate to the second substrate and passing through the vertically communicating space; and a tall electronic component taller than heights of the upper and lower spaces, that is mounted on the first substrate and arranged in the vertically communicating space.

Abstract: In a charger, according to one possible configuration, a pulse signal from a DC/DC converter control unit and a signal from a main safety control unit are applied to a mask. The mask outputs a result of an AND operation on the signals to a gate drive unit and a checking unit. The main safety control unit temporarily changes the output signal from an H level to an L level at a predetermined timing in a state where no information indicating a fault of the charging operation is acquired, and holds the output signal for a predetermined time. When a pulse signal is output without the output of the mask switching to an L level during this time, the checking unit outputs an H level signal. When acquiring the H level signal from the checking unit, the main safety control unit determines that the mask is not operating normally.

Abstract: A charger, in one possible configuration, has an AC/DC converter that converts alternating current power supplied from an external alternating current power supply into direct current power and outputs the direct current power, a DC/DC converter that transforms the direct current power output by the AC/DC converter and supplies the transformed direct current power to a vehicle-mounted battery, and a safety control unit that forcibly stops the DC/DC converter with detection of an occurrence of a fault during charging of the vehicle-mounted battery as a trigger, and subsequently causes the AC/DC converter to stop normally.

Abstract: A battery charger is provided for charging the battery with the use of plural power converters, and the current balance control can be eliminated in the constant voltage charging operation. The battery charger includes the first to n-th power converters configured to convert the power supplied from the power supply and supply the converted power to the battery, and a charge controller configured to cause the power converters to perform a constant current charging operation, a constant power charging operation, and a constant voltage charging operation, to charge the battery. The charge controller causes the first to n-th power converters to operate in parallel in the constant current charging operation and the constant power charging operation, and causes one of the first to n-th power converters to solely operate in the constant voltage charging operation.

Abstract: A circuit of a full-bridge configuration using four semiconductor switch elements is used as a circuit on the primary side of a transformer in a DC-DC conversion device. With this configuration, it is possible to increase the turn ratio of a primary winding and a secondary winding of the transformer and thus increase a voltage generated in the primary winding, and to decrease a current flowing through the primary winding of the transformer and thus decrease breaking currents of the semiconductor switch elements.

Abstract: A cooling structure for cooling a magnetic component, includes a housing adapted to house the magnetic component; a cold air flow path space arranged in the housing for a cold air to flow therethrough; an internal fan disposed inside the housing for flowing the cold air; and an attachment member adapted to fix the magnetic component mounted on a bottom portion of the housing at a position facing a suction side of the internal fan in the cold air flow path space, so that the cold air generated on the suction side of the internal fan passes inside the magnetic component. The bottom portion of the housing mounted with the magnetic component is a cooling body.

Abstract: Provided is a cool air flow space in which cool air, that is generated by an inner fan disposed inside a housing, flows in the housing. An attachment member mounts a magnetic component on a bottom portion of the housing at a position within the cool air flow space. The attachment member includes a top plate and a pair of legs that extends downward from the top plate and that is fixed to the bottom portion.

Abstract: A cooling device includes a plurality of side wall fins formed on an outer surface of a first side wall of a housing, and a plurality of bottom fins formed on a bottom surface of a bottom portion of the housing. A cover member covers the side wall fins and bottom fins from an outer side to form side wall and bottom cooling channels. A chamber is provided that forms a fluid introduction chamber in a direction facing a second side wall so as to communicate with the side wall cooling channel and the bottom cooling channel. A coolant supply device is externally attached to the chamber so as to supply a coolant to the fluid introduction chamber. The side wall fins and the bottom fins are formed in predetermined shapes to adjust an amount of the coolant in the side wall cooling channel and the bottom cooling channel.

Abstract: An electronic equipment cooling device is provided, which has housing in which heat-generating components are housed, and which can cool surfaces of the housing. A blower fan blows air toward the surfaces via a chamber room. An inclined flat plate-like partition portion is provided inside the chamber room so as to distribute a desired amount of air corresponding to a heat generating ratio of the respective surfaces.