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A Planar Transformer With Adjustable Leakage Inductance I-Type Half-Turn Winding

A planar transformer and half-turn winding technology, which is applied in the electromagnetic field, can solve the problems of large winding turns and insufficient window area, and achieve the effects of increasing current carrying capacity, increasing power density, and reducing processing difficulty

Active Publication Date: 2019-05-10
苏州卡方能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a planar transformer with an I-type half-turn winding with adjustable leakage inductance, which is used to solve the problem of too many turns of the primary winding of a planar transformer with a large transformation ratio used in LLC resonant converters and other occasions and the problem of insufficient window area

Method used

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  • A Planar Transformer With Adjustable Leakage Inductance I-Type Half-Turn Winding
  • A Planar Transformer With Adjustable Leakage Inductance I-Type Half-Turn Winding
  • A Planar Transformer With Adjustable Leakage Inductance I-Type Half-Turn Winding

Examples

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Embodiment 1

[0021] Embodiment 1: as Figure 1-3 As shown, a planar transformer with I-type half-turn winding with adjustable leakage inductance includes E-type magnetic core, I-type magnetic core, primary winding, secondary winding W1~W4, rectifier tubes D1-D4 and filter capacitor C1 ~C4;

[0022] The primary winding is wound on the side column and the middle column of the E-shaped magnetic core, and the four I-shaped windings of the secondary winding are stacked in two windows respectively (W1, W2 are stacked on the side column M1 Between M2 and the center column, W3 and W4 are stacked between M2 and M3; stacking can be stacked up and down, or stacked side by side, such as image 3 The side-by-side stacking shown in ; for stacking up and down, W1 and W2 overlap up and down, and W3 and W4 overlap up and down, so it is not shown in the figure); each I-type winding is grounded through a rectifier tube at one end, and grounded through a filter capacitor at one end; , the two I-type winding...

Embodiment 2

[0028] Embodiment 2: as Figure 1-2 and Figure 4 As shown, a planar transformer with I-type half-turn winding with adjustable leakage inductance includes E-type magnetic core, I-type magnetic core, primary winding, secondary winding W1~W4, rectifier tubes D1-D4 and filter capacitor C1 ~C4;

[0029] The primary winding is wound on the side column and the middle column of the E-shaped magnetic core, and the four I-shaped windings of the secondary winding are stacked in two windows respectively; each I-shaped winding is one end through The rectifier tube is connected to the output, and one end is connected to the output through the filter capacitor; the E-type magnetic core and the I-type magnetic core are snapped together; among them, the two I-type windings in the same window, the port grounded by the capacitor and the port grounded by the rectifier tube are located at the same side.

[0030] Further, each of the I-type windings can be set to be output through a rectifier t...

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PUM

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Abstract

The invention relates to a planar transformer adjustable in leaking inductance for an I-type half-turn winding. The transformer includes an E-type magnet core, an I-type magnet core, primary windings,secondary windings W1-W4, rectifier tubes D1-D4 and filter capacitors C1-C4; the primary windings are wound around lateral columns and a central column of the E-type magnet core, and four I-type windings of the secondary windings are stacked in two windows respectively two by two; one end of each I-type winding is connected with the ground through the corresponding rectifier tube, and the other end of each I-type winding is connected with the ground through the corresponding filter capacitor, or one end of each I-type winding is connected with an output end through the corresponding rectifiertube, and the other end of each I-type winding is connected with the output end through the corresponding filter capacitor; the E-type magnet core is buckled with the I-type magnet core, and the ports, grounded through the corresponding capacitors, of the two I-type windings in each window and the ports, grounded through the corresponding rectifier tubes, of the two I-type windings in the windoware positioned at the same side. By means of the planar transformer, the secondary windings can be equivalent to half-turn windings, so that the turn number of the primary windings can be half of thatof original one-turn secondary windings, the winding size and processing difficulty of the transformer are greatly reduced, and the power density is increased.

Description

technical field [0001] The invention relates to a planar transformer with an I-type half-turn winding with adjustable leakage inductance, which belongs to the field of electromagnetic technology. Background technique [0002] Due to its small size, planar transformers are often used in applications that require high power density. Among them, the LLC resonant converter is widely used in high-end power supplies and busbar converters because of its easy realization of soft switching, high efficiency and power density. [0003] The LLC resonant converter generally includes a front-stage full-bridge / half-bridge inverter circuit, a resonant capacitor, a resonant inductor, a transformer and a secondary rectification and filtering circuit. LLC resonant converters are often used in applications with large voltage transformation ratios such as 400V to 12V, so the transformer transformation ratio can reach 16 or higher. [0004] For topologies such as the LLC resonant converter, in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/24H01F27/28H01F27/34H01F27/40
CPCH01F27/24H01F27/28H01F27/346H01F27/40H01F2027/408
Inventor 李思奇唐海林竹立岩闵青云张瑞杜肖
Owner 苏州卡方能源科技有限公司