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Transformer unit for a resonant converter

A technology of transformer unit and resonant converter, applied in the direction of transformer, transformer/inductor core, transformer/inductor cooling, etc., can solve the problems of electromagnetic interference, large leakage inductance, etc., and achieve the goal of improving thermal management and improving shielding efficiency. Effect

Inactive Publication Date: 2019-08-02
弗里沃电器有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, integrated transformers also have some disadvantages caused by loosely coupled windings
For example, leakage inductance generates large magnetic stray fields, causing electromagnetic interference (EMI) problems

Method used

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  • Transformer unit for a resonant converter
  • Transformer unit for a resonant converter
  • Transformer unit for a resonant converter

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Embodiment Construction

[0043] The invention will now be explained in more detail with reference to the accompanying drawings, and first to figure 2 . figure 2 An exploded view of switching power supply 400 is shown. The switching power supply 400 includes a housing formed by a cover element 402 and a bottom element 404 . The housing element is made of an insulating material such as plastic. Housing elements are used to mechanically support and protect the integrated components. In particular, the cover element 402 includes a heat sink element 406 , also referred to as a second heat sink 406 , and the bottom element 404 supports a printed circuit board (PCB) 500 . The PCB is used to mechanically support and electrically contact the transformer unit 100 .

[0044] The transformer unit 100 includes a transformer 200 and a shielding element 300 . refer to image 3 The transformer 200 is described in detail. Transformer 200 includes a primary winding 202 and a secondary winding 204 . In particu...

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Abstract

A transformer unit (100) for a resonant converter comprises: a primary winding (202) loosely coupled by induction to at least one secondary winding (204), whereby a leakage inductance is generated, and a shielding element (300) covering at least one of the primary winding (202) or the secondary winding (204) for blocking electromagnetic noise generated by the leakage inductance, wherein the shielding element (300) is thermally coupled to at least one of the primary winding or the secondary winding for transferring heat generated by the transformer unit (100).

Description

technical field [0001] The invention relates to a transformer unit for a resonant converter. Furthermore, the invention relates to a resonant converter comprising said transformer unit. In addition, the invention relates to a switching power supply comprising said resonant converter. Background technique [0002] Generally, resonant power conversion has the advantages of smooth waveform and high power density. Operating the converter in resonant mode at the point of least impedance between the input and output of the circuit also provides improved efficiency. According to their physical principles, resonant converters are switching converters that include a resonant tank circuit that actively participates in determining the input to output power flow. A resonant converter is based on a resonant inverter, a system that converts a DC voltage into a sinusoidal voltage (and more generally, into a low harmonic content AC voltage) and supplies AC power to a load. To this end, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/36H02M3/28H02M1/44
CPCH01F27/288H01F27/36H02M3/28H02M1/44H01F27/363H01F27/22H01F27/303H01F27/32H01F38/08H01F27/325H01F27/08H02M3/33507H01F27/24
Inventor L.许
Owner 弗里沃电器有限责任公司
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