Control method for inductance parameter of high-frequency transformer body

Abstract

The invention provides a control method for an inductance parameter of a high-frequency transformer body. The control method comprises excitation inductance control and leakage inductance control of a high-frequency transformer; the rated voltage and the work frequency of the high-frequency transformer are known under the condition that the magnetic core structure and dimension are determined; the excitation inductance control method comprises the following steps: selecting a magnetic core material according to different magnetic core material magnetization characteristics and different saturation flux densities; controlling the work flux density to be Bm; and controlling an air-gap length to be lg under the condition of an open air gap of the magnetic core; and the leakage inductance control method comprises the following steps: controlling the number of turns of single-layer windings in primary and secondary windings; controlling the interlayer thickness of the primary winding, the interlayer thickness of the secondary winding and the thickness between the primary winding and the secondary winding; and changing the arrangement mode of the primary winding and the secondary winding in a separating manner, a sandwich manner and a complete coordinated transposition manner. The control method provided by the invention is used for controlling the inductance parameter, so that resonance on conversion topologies at two sides of the high-frequency transformer is achieved; and the voltage quality is improved.

Description

technical field [0001] The invention relates to the technical field of high-frequency transformers, in particular to a method for controlling the inductance parameters of a high-frequency transformer body. Background technique [0002] Based on power electronics technology, scholars at home and abroad have begun to explore and study a new type of intelligent transformer that realizes power conversion - Power Electronic Transformer (PET for short), also known as Solid-State Transformer (SST for short). As a highly controllable new type of substation equipment, the power electronic transformer is characterized by the ability to flexibly control the voltage amplitude and phase of the primary and secondary sides of the transformer to meet many new requirements for the future development of smart grids. [0003] With the development of power electronic devices, the application of IGBT and thyristor MOSFET in power electronic topology has greatly enhanced the switching speed and o...

AI Technical Summary

Problems solved by technology

[0007] At present, in the design process of the existing high-frequency transformer body, there is no accurate control of its own inductance parameters, but the design is carried out according to the design capacity, voltage level and operating frequency of the high-frequency transformer, and the size of the magnetic core, the number of turns and the number of windings are determined. Arrangement, etc.

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