Unlock instant, AI-driven research and patent intelligence for your innovation.

high frequency transformer

A high-frequency transformer and magnetic core technology, applied in the field of transformers, can solve problems such as complex design, increased distance leakage inductance, large volume, etc., and achieve the effect of increasing leakage inductance, reducing production process and wiring complexity

Active Publication Date: 2018-06-26
SHENZHEN LEDFRIEND OPTOELECTRONICS
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a high-frequency transformer with a combined resonant inductance (leakage inductance), which can solve the problems that the existing resonant power supply needs to add an independent inductance, complex design, and large volume
It can also solve the existing problem of increasing the leakage inductance by increasing the distance between the primary and secondary windings, which is difficult to meet the needs of the application.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • high frequency transformer
  • high frequency transformer
  • high frequency transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 The high frequency transformer shown includes a bobbin 10 , a primary winding 21 , a secondary winding 22 and a main magnetic core 30 . Wherein, the skeleton 10 includes a main magnetic core accommodation portion 11, the main magnetic core 30 includes a winding magnetic column 31, and the winding magnetic column 31 is located in the main magnetic core accommodation portion 11, and the outer wall of the main magnetic core accommodation portion 11 is provided with a primary winding portion in turn. 12. Magnetic leakage core housing part 13 and secondary winding part 14, primary winding 21 and secondary winding 22 are respectively wound on primary winding part 12 and secondary winding part 14; high frequency transformer also includes magnetic leakage core 40 . The magnetic leakage core 40 is located in the magnetic leakage core containing part 13 . In this embodiment, the main magnetic core 30 is composed of two "E"-shaped (including E-shaped) magnetic co...

Embodiment 2

[0031] figure 2 A schematic diagram of the decomposition structure of a high-frequency transformer provided for this embodiment, refer to figure 2 The difference between the present embodiment and the first embodiment is that an air gap 41 is provided on the leakage magnetic core 40 , and typically, the air gap 41 may be at the interface of the composite magnetic core assembly. In this embodiment, one arm of the U-shaped magnetic core is slightly shorter, and the UU-shaped magnetic cores are combined to form an air gap at the interface.

[0032] In another embodiment, since the side length of the side of the interface side of the UU or UI type combined magnetic core corresponding to the leakage magnetic core receiving portion 13 is slightly larger than the inner side length of the interface side of the UU, UI or CC type combined magnetic core , so that the UU, UI or CC combined magnetic core cannot be completely contacted, so that an air gap 41 is formed at the interface of...

Embodiment 3

[0034] Such as image 3 As shown, the UI-shaped combined magnetic core 100 includes two side parts, that is, the side parts of the U-shaped magnetic core 110 and the I-shaped magnetic core 120 itself, and at least one of the two side parts is formed by the combined magnetic core 100. The inner side of the word "口" is provided with a side protrusion 130, and the side protrusion 130 is cylindrical or prism-shaped; There is at least one (preferably, equal in number to the side protrusions 130 ) through hole 230 , and the through hole 230 runs through the outer wall of the main magnetic core receiving portion 210 ; In another embodiment, the through hole 230 does not penetrate through the outer wall of the main magnetic core receiving part 210 , but forms a groove. On the one hand, the magnetic leakage core (not shown in the figure) can be made closer to the main magnetic core (not shown in the figure), so that the side branch magnetic circuit formed by the magnetic leakage core ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-frequency transformer which comprises a framework, a primary winding, a secondary winding and a main magnetic core. The framework comprises a main magnetic core containing portion, the main magnetic core comprises a winding magnetic column which is positioned inside the main magnetic core containing portion, a primary winding portion, a leaking magnetic core containing portion and a secondary winding portion are arranged on the outer wall of the main magnetic core containing portion sequentially, and the primary winding and the secondary winding are wound on the primary winding portion and the secondary winding portion respectively; the high-frequency transformer further comprises a leaking magnetic core positioned inside the leaking magnetic core containing portion. The leaking magnetic core is arranged to act on magnetic wires of the primary winding, the secondary winding and the main magnetic core to form collateral branch magnetic flux, so that leaking inductance is increased. When a resonant power source is manufactured, an independent inductor does not need to be set additionally, so that manufacturing process and wiring complexity are reduced.

Description

technical field [0001] The invention relates to the field of transformers, in particular to transformers used in high-frequency electronic circuits. Background technique [0002] In the application of high-frequency switching power supply, especially in the resonant conversion topology, it is necessary to use a resonant inductor and a transformer. There are two commonly used design methods: [0003] 1. Using traditional transformers and independent resonant inductors will complicate the structure of the power supply, increase the volume, complicate the wiring of the PCB board, and cause large electromagnetic interference. Lead to low product efficiency, large volume, and high cost. [0004] 2. Simply integrate the resonant inductor into the transformer, and use it as a resonant inductor by increasing the leakage inductance of the transformer. Usually by changing the distance between the primary and secondary windings to change the leakage inductance of the transformer to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/30H01F3/14H01F19/04
CPCH01F3/14H01F19/04H01F27/306
Inventor 朱俊高阮少峰李少科范勇黄斌
Owner SHENZHEN LEDFRIEND OPTOELECTRONICS