Three-phase interleaved resonant converters with integrated magnetics are described. In various examples, transformers are integrated into a transformer core of a converter. A primary side circuit includes a set of circuit segments corresponding to phases of the three-phase interleaved converter. Each of the circuit segments include an integrated winding component that provides a transformer primary winding and a resonant inductor connected in series.

A three-phase transformer includes a magnetic core and winding, wherein the magnetic core includes first and second cover plates and magnetic pillar units. The first and second cover plates are arranged opposite to each other, the magnetic pillar units are sandwiched between the first and second cover plates; a first winding is wound on a first magnetic pillar of a first magnetic pillar unit, and a fourth winding is wound on a second magnetic pillar of the first magnetic pillar unit; a second winding is wound on a first magnetic pillar of a second magnetic pillar unit, and a fifth winding is wound on a second magnetic pillar of the second magnetic pillar unit; a third winding is wound on a first magnetic pillar of a third magnetic pillar unit, and a sixth winding is wound on a second magnetic pillar of the third magnetic pillar unit.

A core main body includes: an outer peripheral iron core, and at least three iron cores coupled to an inner surface of the outer peripheral iron core, in which a gap is formed between adjacent iron cores among the at least three iron cores, the gap being magnetically connectable, and a plurality of notches are formed on an outer circumferential surface of the outer peripheral iron core, the plurality of notches extending in an axial direction of the outer peripheral iron core. The reactor includes such a core body.

A three-phase power supply circuit is provided. The power supply circuit includes three LLC resonant voltage convertors, three step-down transformers, and a bridge rectifier. Each step-down transformer includes a primary and secondary coil, and each primary and secondary coil has a first node and a second node. Each step-down transformer is electrically coupled with one of the three LLC resonant voltage convertors by the first and second nodes of the primary coils. The bridge rectifier is electrically coupled with the first node of the secondary coil of each of the three step-down transformers. The second nodes of the secondary coils of each of the three step-down transformers are electrically coupled together.

It has been difficult to manufacture a large-capacity transformer having a laminated iron core structure using an amorphous alloy material easily. A laminated iron core structure includes a laminated iron core configured by aligning a plurality of laminated iron core blocks each configured by laminating iron core materials in a direction different from a lamination direction, a first frame extending along an outer periphery of the laminated iron core and a partition plate arranged between the plurality of laminated iron core blocks.

It has been difficult to manufacture a large-capacity transformer having a laminated iron core structure using an amorphous alloy material easily. A laminated iron core structure includes a laminated iron core configured by aligning a plurality of laminated iron core blocks each configured by laminating iron core materials in a direction different from a lamination direction, a first frame extending along an outer periphery of the laminated iron core and a partition plate arranged between the plurality of laminated iron core blocks.

A transformer includes a core having first and second yokes and at least one leg extending between the first and second yokes. The at least one leg includes a coil assembly mounted thereto between the first and second yokes. An annular end barrier is provided at one or both ends of the coil assembly to provide a barrier between the adjacent yoke and a high voltage winding of the coil assembly.

An auto-transformer rectifier system comprising an 18-pulse (or multiple of 18-pulse) autotransformer rectifier unit ATRU having three, or a multiple of three, diode bridge rectifiers and a balancing resistor to balance the power flow through the diode bridge rectifiers, wherein the balancing resistor has a variable resistance, and further comprising a controller configured to identify imbalances between power flows of the respective diode bridge rectifiers and to adjust the resistance of the balancing resistor in response to the detected imbalance.

An auto-transformer rectifier system comprising an 18-pulse (or multiple of 18-pulse) autotransformer rectifier unit ATRU having three, or a multiple of three, diode bridge rectifiers and a balancing resistor to balance the power flow through the diode bridge rectifiers, wherein the balancing resistor has a variable resistance, and further comprising a controller configured to identify imbalances between power flows of the respective diode bridge rectifiers and to adjust the resistance of the balancing resistor in response to the detected imbalance.

The present application provides a magnetic assembly, a manufacturing method thereof, a power module and a switching power supply. The magnetic assembly comprises at least two X-type magnetic cores and at least one I-type magnetic core; a winding is arranged on the X-type magnetic core, and the at least two X-type magnetic cores and the at least one I-type magnetic core form a closed magnetic circuit; the X-type magnetic core includes a winding post and four side posts surrounding the winding post, and one side of each of the four side posts is respectively connected with one side of the winding post to form a connection surface; the other sides of the four side posts and the winding post are respectively arranged in contact with the connection surface of the I-type magnetic core or other X-type magnetic cores. The application can solve the problem of poor heat dissipation after integration of a plurality of magnetic elements.