A welding transformer includes a core, and a primary winding and a secondary winding wound alternately around the core. The primary winding has a first strip-shaped conductor with the width direction thereof extending parallel to the direction Dy of flux passing through the core. The secondary winding has a second strip-shaped conductor with the width direction thereof extending parallel to the direction Dy of the flux passing through the core. The first strip-shaped conductor and the second strip-shaped conductor are laminated alternately in a direction Dx perpendicular to the direction Dy of the flux.

An electromagnetic pulse welding coil includes a first conductive region and a second conductive region. The second conductive region is assigned to a remainder of the coil and has a low current density. The first conductive region is configured for generating a higher current density than the second conductive region. The first conductive region is detachably connected to the remainder of the coil using a detachable connection. The electromagnetic pulse welding coils is planar in design and is cut out of a metal plate.

A welding-type power supply including a balanced plate rectifier to rectify high frequency alternating current from one or more transformers. The balanced plate rectifier includes an output terminal symmetrically connected to the plates of the plate rectifiers. The impedance between the output terminal and each plate is substantially equal.

The present invention proposes a low voltage high current power supply device, comprising: at least one transformer body, a primary coil and at least one secondary coil; a plurality of central leading out terminals and a plurality of secondary leading out terminals of strip shapes are provided at different positions of the at least one secondary coil, the plurality of central leading out terminals and the plurality of secondary leading out terminals are provided symmetrically at both sides of the magnetic core; a thermal dissemination unit comprising a first thermal dissemination panel and a second thermal dissemination panel, the first thermal dissemination panel is provided at a top portion of the at least one transformer body, the second thermal dissemination panel is provided at a bottom portion of the at least one transformer body, the plurality of central leading out terminals and the plurality of secondary leading out terminals are connected symmetrically at both sides of the first thermal dissemination panel and the second thermal dissemination panel; an inverter assembly provided on the first thermal dissemination panel and connected with the primary coil; and a rectifier assembly, symmetrically provided at both sides of the second thermal dissemination panel. In the present invention, the leakage inductance of the transformer is reduced, output power of the high frequency welding power supply is improved, volume of the transformer is greatly reduced, meanwhile, and free interchange of C-shaped welding tongs and X-shaped welding tongs of the power supply device is realized, which brings significant convenience to fabrication and maintenance work.

The disclosure relates to a power component for providing an electric current, having plates aligned parallel to one another which are connected to the current inputs and the current outputs of power semiconductors embedded in a component carrier. High currents, for example for resistance welding, can thereby be controlled without excessive heat losses resulting in an increase in temperature of the entire arrangement and thereby in a reduction of the service life.

A method and apparatus for providing welding-type power supply includes a power circuit and a controller. The power circuit receives input power and provides welding type power and auxiliary power. It is controlled on a control input. The power circuit also includes an auxiliary power transformer. A temperature responsive component is mounted in the auxiliary power transformer and provides a temperature signal indicative of the temperature in the auxiliary power transformer. The controller controls a cooling fan for the aux power transformer and/or turns off the aux power output in response to the sensed temperature.

A method and apparatus for providing welding type power, including a power and control circuit is disclosed. The power circuit provides welding, control and aux power. The control and aux power are provided with a transformer, and secondary windings for control and aux power are wound on a single bobbin, with a winding separator separating them. Air vents, which can be formed by fins on the bobbin or separator allow cooling of the inner winding.

A method and apparatus for providing welding-type power supply includes a power circuit and a controller. The power circuit receives input power and provides welding type power and auxiliary power. It is controlled on a control input. The power circuit also includes an auxiliary power transformer. A temperature responsive component is mounted in the auxiliary power transformer and provides a temperature signal indicative of the temperature in the auxiliary power transformer. The controller controls a cooling fan for the aux power transformer and/or turns off the aux power output in response to the sensed temperature.

A method for manufacturing a heavy-current transformer with at least one primary winding and at least one secondary winding with surfaces for contacting connects first inner surfaces of the at least one secondary winding with an I-beam of electrically conductive material of the heavy-current transformer with a first soldering material at a first, higher melting temperature, and subsequently at least one contact plate of electrically conductive material is soldered with exterior surfaces of the at least one secondary winding with a second soldering material at a second melting temperature that is lower as compared to the first melting temperature.

High-frequency transformers using solid wire for welding-type power supplies are disclosed. An example welding-type power supply transformer includes: a first coil assembly comprising a first plurality of turns of a first solid wire wrapped around a first bobbin to form a first single-layer primary winding, and a second plurality of turns of a second conductor over the first plurality of turns to form a first single-layer secondary winding; a second coil assembly comprising a third plurality of turns of a second solid wire wrapped around a second bobbin to form a second single-layer primary winding, and a fourth plurality of turns of the second conductor over the third plurality of turns to form a second single-layer secondary winding; and first and second cores disposed at least partially within the first and second bobbins.