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Transformer unit and power conversion circuit

A power conversion circuit and transformer unit technology, which is applied to transformers, transformer/inductance parts, variable transformers, etc., can solve the problems of not too many via holes, increased primary winding loss, etc., to reduce the size limit, Effect of reducing winding loss and reducing impedance

Active Publication Date: 2019-05-07
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this S / P / S structure transformer, since the vias between the secondary windings W1 and W2 will pass through the primary winding, the number of vias should not be too large, otherwise the primary winding will be cut off, making the primary winding Increased resistance loss; due to the limited number of vias, further optimization of winding losses is limited

Method used

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  • Transformer unit and power conversion circuit
  • Transformer unit and power conversion circuit
  • Transformer unit and power conversion circuit

Examples

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Embodiment Construction

[0054] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0055] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, one skilled in the art will appreciate tha...

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Abstract

The present disclosure provides a transformer unit and a power conversion circuit. The transformer unit includes: a first secondary wiring layer, including a first secondary winding; a second secondary wiring layer, adjacent to the first secondary wiring layer, including a second secondary winding, and the The first end of the second secondary winding is connected to the first end of the first secondary winding through at least one first via; and a plurality of primary wiring layers, including a primary winding, and the first secondary wiring layer and the second secondary wiring layer are located between the plurality of primary wiring layers; wherein at least one of the first vias is located within the projection of the primary winding in at least one of the plurality of primary wiring layers. The disclosure can effectively reduce the leakage inductance and winding loss of the transformer.

Description

technical field [0001] The present disclosure relates to the technical field of power supplies, in particular to a transformer unit and a power conversion circuit using the transformer unit. Background technique [0002] The development of data centers will make it possible to convert the input of POL (point-of-load) power from 12V to 48V or even 400V, and the output voltage of POL is often relatively low. Therefore, a high-frequency conversion circuit capable of achieving a high input-to-output voltage ratio is required , such circuits often contain a transformer. However, it is not easy to achieve high efficiency at high frequency and high current on the output side. In related technologies, for example, the LLC (resonant converter) topology is widely used due to advantages such as low switching loss, high efficiency, and easy expansion of output power. For low-voltage high-current output applications, such as figure 1 As shown, multiple transformers are usually connect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F29/00H01F27/28H01F27/40H02M3/335
CPCH01F27/2804H01F27/40H01F29/00H01F2027/2809H02M3/33523H02M1/0048H01F27/346H02M3/28H02M3/33576Y02B70/10H02M5/12
Inventor 曾剑鸿辛晓妮
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
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