The present disclosure relates to a converter for an air conditioner. The converter includes a substrate; an inductor disposed in one side of the substrate, and comprising a core and a coil wound around the core; a switching element disposed in one side of the substrate, and selectively controlling a flow of a circuit; and a heat sink for absorbing heat generated from the switching element by contacting the switching element, wherein a lead-in hole is formed in one side of the substrate, and at least a portion of the inductor is disposed in the lead-in hole, thereby quickly discharging the heat generated by the inverter and more efficiently using a space.

A transformer includes two first cores, a primary winding and a secondary winding. The secondary winding has a first section and a second section. The first section has a first outlet end, a second outlet end, and a first connection end, wherein the first outlet end and the second outlet end are located at a side of the first section, the first connection end is located at an opposite side of the first section. The second section has a third outlet end, a fourth outlet end, and a second connection end. The third outlet end and the fourth outlet end are located at a side of the second section, and the second connection end is located at an opposite side of the second section. A portion of the primary winding is located between the first section and the second section of the secondary winding.

A power converter includes a semiconductor unit, a capacitor unit, a first input connector, a second input connector, an output connector, a housing case, a first input bus bar connecting the first input connector and the semiconductor unit, a second input bus bar connecting the second input connector and the semiconductor unit, an output bus bar connecting the semiconductor unit and the output connector, and a bus bar connecting portion at which the first input bus bar and the second input bus bar are connected. The capacitor unit is arranged in a portion of the first input bus bar between the first input connector and the bus bar connecting portion.

A semiconductor device includes a semiconductor element, a first wiring member, a second wiring member, and a terminal. The semiconductor element includes a first main electrode and a second main electrode on a side opposite from the first main electrode. The first wiring member is connected to the first main electrode. The terminal has a first terminal surface connected to the second main electrode and a second terminal surface. The second terminal has four sides. Two of the four sides are parallel to a first direction intersecting the thickness direction, and other two sides of the four sides are parallel to a second direction perpendicular to the thickness direction and the first direction. The second wiring member is connected to the second terminal surface of the terminal through solder, and has a groove. The groove overlaps one or two of the four sides of the second terminal surface.

A motor integrated inverter apparatus includes a drive motor on which a decelerator is installed, and an inverter installed to be directly connected to the drive motor. The inverter includes an inverter cover installed on a side of the drive motor and having an installation space defined therein, a capacitor having the installation space defined in the inverter cover so that an end of the drive shaft is inserted into the installation space, a control board installed on a side of the capacitor, and a cooling part installed between the control board and the capacitor.

An isolated switch-mode power supply includes at least one input, at least one output, and a power circuit coupled between the at least one input and the at least one output for converting an input voltage or current to an output voltage or current. The power circuit includes a transformer having one or more primary windings, one or more secondary windings, an electrical insulator, and a core magnetically coupling the one or more primary windings and the one or more secondary windings. Upper portions of the primary and secondary windings are covered with the electrical insulator. Other example switchmode power supplies, transformers, magnetic chokes and methods are also disclosed.

A voltage regulator module includes a circuit board, a positive input terminal, a negative input terminal, a positive output terminal, a negative output terminal, a switching circuit, a magnetic element and an input capacitor. The switching circuit is disposed on a top surface of the circuit board, and comprises two switches connected in series to form a midpoint, wherein the switching circuit is connected to the positive input terminal. The magnetic element comprises a magnetic core and a conductive structure in the circuit board, wherein the magnetic element and the switching circuit are arranged on the circuit board along a first direction, the conductive structure is connected to the midpoint of the corresponding switching circuit and the positive output terminal. The input capacitor is connected to the positive input terminal and the negative input terminal, and disposed on a bottom surface of the circuit board.

A temperature control system (300) for a variable frequency drive (10, 100) includes a sealed enclosure (310), a power electronic component (330) and/or a power magnetic component (320) positioned inside the sealed enclosure (310), and a controller (400) configured to control a temperature of the power electronic component (330) and/or the power magnetic component (320) relative to an internal air temperature (Tair) inside the sealed enclosure (310) prior to an electrical energy application and operation of the power electronic component (320) and/or power magnetic component (320) to prevent condensation induced electrical failure of the power electronic component (330) and/or power magnetic component (320) utilizing a cooling system (340) and/or a heating system (350).

A downhole power generation includes a power generation module for providing power to a load. A turbine is driven by flow of a downhole fluid to rotate. A generator is coupled with the turbine for converting rotational energy from the turbine to electrical energy, and an AC-DC rectifier is coupled with the generator for converting an alternating voltage from the generator to a direct voltage. A power conversion circuit couples the AC-DC rectifier with the load. The power conversion circuit is configured for providing a first power to the load when the load is in a working mode and providing a second power to the load when the load is in a non-working mode. The second power is less than the first power. A downhole power generation method is also disclosed.

An efficient, high density, inline converter module includes a power conversion circuit and an input wiring harness for connecting the input of the power circuit to a unipolar source. A second wiring harness or electrical connectors may be provided for connecting the output of the power conversion circuit to a load. Connections between a wiring harness and the power conversion circuit may comprise conductive contacts, configured to distribute heat. The power circuit may be over molded to provide electrical insulation and efficient heat transfer to external ambient air. A DC transformer based inline converter module may be used in AC adapter, vehicular, and power system architectures. An input connector for connecting the input wiring harness to the input source may be provided. In some embodiments the input source may be an AC source and the input connector may comprise a rectifier for delivering a rectified, unipolar, voltage to the input of the power conversion assembly via an input wiring harness. By separating the rectifier from the power conversion assembly, the power conversion assembly may be packaged into a smaller volume than would be required if the rectifier, and its associated heat loss, were included in the power conversion assembly.