High-frequency switching power supply transmission line transformer winding method
A transmission line transformer and high-frequency switching power supply technology, which is applied in the direction of transformer/inductor coil/winding/connection, transformer/inductor magnetic core, coil manufacturing, etc., and can solve problems such as difficulty in obtaining, overheating of magnetic core, and transformer waveform distortion , to achieve the effect of increasing the practical bandwidth and practical power and reducing the calorific value
Pending Publication Date: 2022-04-15
HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
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Problems solved by technology
[0004] As the switching frequency increases, in order to improve the coupling performance between windings and reduce leakage inductance, the "sandwich" winding method is generally adopted, that is, the winding with fewer turns is sandwiched between the winding layers with more turns; when the transformer is working After the frequency reaches the MHz level, conventional transformer winding methods and "sandwich" winding methods will cause transformer waveform distortion and core overheating
High-performance high-frequency magnetic cores are expensive and difficult to obtain
Method used
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[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0017] This embodiment provides a high-frequency switching power supply transmission line transformer winding method to achieve the purpose of increasing the practical bandwidth and practical power of the high-frequency switching power supply transformer and reducing the calorific value of the magnetic core.
[0018] In this program, see figure 1 , in order to ensure a better effect, the cross-section of the magnetic core selected here is circular; that is, the cross-section of the magnetic core where the winding is located is preferably circular, and at the same time two pairs of parallel wire pairs are wound on the magnetic core (parallel wire pair 1 and parallel wire pair Line pair 2), by using the above settings...
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The invention discloses a winding method of a high-frequency switching power supply transmission line transformer, and relates to the field of power electronic application, in particular to a magnetic core, and the cross section of the magnetic core is circular; two parallel wire pairs are wound on the magnetic core; according to the invention, a mode of winding parallel line pairs on a cylindrical magnetic core is adopted; practical bandwidth and practical power of the high-frequency switching power supply transformer can be remarkably improved, and the heating value of the magnetic core is reduced.
Description
technical field [0001] The invention relates to the application field of power electronics, in particular to a winding method for a transmission line transformer of a high-frequency switching power supply. Background technique [0002] The miniaturization, intelligence and diversification of electronic equipment require modularization and miniaturization of switching power supplies. The main way to increase the power volume density of switching power supplies is to increase the operating frequency. As the operating frequency of switching power supplies becomes higher and higher, the winding method of transformers, especially high-frequency and high-power transformers, has an increasingly important impact on performance. [0003] In conventional transformer winding, one winding is generally wound first, an insulating layer between groups is added, and then another winding is wound. This winding method is suitable for mass production of medium and low frequency transformers, a...
Claims
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IPC IPC(8): H01F41/06H01F27/24H01F27/30
Inventor 张云建
Owner HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)