Three-phase high-frequency transformer applied to power electronic transformer
A high-frequency transformer and power electronics technology, applied in the direction of transformer/inductor magnetic core, transformer/inductor components, transformers, etc., can solve the problem of loss of low-voltage module double frequency current, unable to meet the weight of transformer core and other problems , to achieve the effect of reducing loss, reducing total loss and reducing current
Inactive Publication Date: 2020-08-25
QINGDAO TOPSCOMM COMM +1
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[0004] The purpose of the present invention is to provide a three-phase high-frequency transformer applied to power electronic transformers, which is used to solve the problems of transformer core weight, loss and double frequency current of low-voltage modules that cannot be satisfied in the prior art
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[0012] At present, the high-frequency transformers used in power electronic transformers are all single-phase transformers. The iron core is U-shaped, E-shaped or ring-shaped. The utilization rate of the iron core is low, and the core loss, volume and cost are relatively high. At the same time, the double frequency current exists in the whole system, that is, from the high-voltage module to the high-frequency transformer and then to the low-voltage module, which increases the effective value of the current and leads to an increase in loss.
[0013] In view of the above problems, the present invention provides a three-phase high-frequency transformer applied to power electronic transformers, figure 1 It is a schematic diagram of the structure of a three-phase high-frequency transformer applied to a power electronic transformer, including a three-phase high-voltage winding, a three-phase low-voltage winding, and a three-phase conjugate core, wherein the low-voltage winding and th...
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The invention discloses a three-phase high-frequency transformer applied to a power electronic transformer. The transformer comprises three-phase high-voltage windings, three-phase low-voltage windings and three-phase conjugate iron cores. The low-voltage windings and the iron cores are mutually insulated; the three-phase low-voltage windings are respectively wound on the three iron core middle columns; each phase of high-voltage winding is insulated from the low-voltage windings and the iron cores through epoxy resin or other insulating materials and is wound on the same iron core middle column corresponding to the low-voltage winding; the three iron core middle columns are connected with one another to form two shared iron core yokes; and the three iron core middle columns and the two shared iron core yokes form a three-phase conjugate iron core together. The three-phase low-voltage windings are connected together in series or in parallel. The three-phase high-frequency transformer is applied to the power electronic transformer, and the problems that in the prior art, the weight and loss of a transformer iron core and the double-frequency current of a low-voltage module cannot bemet are solved.
Description
technical field [0001] The invention belongs to the fields of AC and DC distribution networks, power electronics technology and power systems, and in particular relates to a high-frequency transformer applied to power electronics transformers. Background technique [0002] Traditional power frequency transformers have disadvantages such as large volume, high loss, slow fault response, and easy waveform distortion, which cannot meet the needs of building a strong smart grid. As a new type of power distribution equipment, power electronic transformers do not have the above-mentioned shortcomings of traditional transformers, and realize multiple functions such as power conversion, strong current isolation, and dynamic power adjustment to meet the needs of smart grids. [0003] Power electronic transformers usually adopt module cascade topology, generally composed of high-voltage modules, high-frequency transformers, and low-voltage modules. At present, the high-frequency trans...
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IPC IPC(8): H01F30/12H01F27/26H01F27/30
CPCH01F30/12H01F27/263H01F27/306
Inventor 范建华徐鹏飞肖汝腾王庆园于晓强张建李伟吴雪梅卢峰林志超程艳艳叶齐
Owner QINGDAO TOPSCOMM COMM