Determining method for maximum design capacity of high-frequency transformer

Abstract

The invention provides a determining method for the maximum design capacity of a high-frequency transformer. The determining method includes the steps that 1, the magnetic core loss coefficient of the high-frequency transformer is obtained; 2, the magnetic core area Ap, magnetic core volume Vcore and magnetic core window area Wa of the high-frequency transformer and a temperature increase coefficient Ks are obtained; 3, the optimal working magnetic flux density value Bopt of the high-frequency transformer is calculated; 4, the value of primary design capacity S0, the winding number of a primary winding and a secondary winding of the high-frequency transformer, an alternate-current winding coefficient Fr and the average winding length MLT of the primary winding and the secondary winding are calculated; 5, the maximum design capacity Sm is calculated; 6, new maximum design capacity S'm is calculated; 7, the new maximum design capacity S'm and the maximum design capacity Sm are compared. Compared with the prior art, under the condition that the structure and size of a magnetic core are fixed, the maximum design capacity value of the transformer can be convenient to determine.

Description

technical field [0001] The invention relates to the technical field of high-frequency transformers, in particular to a method for determining the maximum design capacity of a high-frequency transformer. 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. In the realization of the high-power topology of the power electronic transformer, the high-frequency transformer body in the middle is the most basic and most important electromagne...

AI Technical Summary

Problems solved by technology

[0007] At present, in terms of engineering technology, the design of high-frequency transformers is based on known parameters such as design capacity and frequency. According to the area design formula of high-frequency transformers, the specifications and sizes of the magnetic cores are determined, and then the winding layout is carried out. In the end, this design method can meet the engineering design requirements. However, with the development of power electronic technology, the future power electronic transformer will have larger capacity, smaller volume, and more device integration. , the volume requirements for the high-frequency transformer will be more stringent and precise

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