A Calculation Method of Magnetic Core Losses with Different Sectional Areas

A calculation method and cross-sectional area technology, applied in calculations, special data processing applications, instruments, etc., can solve problems such as dependence on test equipment and inconvenient early design stages

Active Publication Date: 2017-02-08
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously we can test the loss of the actually selected magnetic core material to obtain the loss data, but such a method depends on the test equipment and is not convenient for the early design stage of the project

Method used

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  • A Calculation Method of Magnetic Core Losses with Different Sectional Areas
  • A Calculation Method of Magnetic Core Losses with Different Sectional Areas
  • A Calculation Method of Magnetic Core Losses with Different Sectional Areas

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0028] Considering the efficiency, size and reliability comprehensively, according to the different excitation strength of the working magnetic field of the high-frequency transformer of the switching converter, the hysteresis loss P h The relationship with the magnetic flux density change index x varies between 2 and 3, and its hysteresis loss P h Applicable to the characteristics expressed by formula (1).

[0029] P h ∝ B ^ x f - - - ( 1 )

[0030] The general relationship of eddy current loss density is:

[0031] P e ∝ B ^ 2 f 2 A e ρ ...

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Abstract

The invention discloses a method for calculating losses of magnetic cores with different sectional areas. The method comprises the following steps of firstly, separating magnetic hysteresis loss from eddy current loss under the conditions that work efficiency and magnetic flux density variable quantity are given; secondly, calculating difference of the sectional area of a magnetic core used in an actual engineering and the sectional area of a magnetic core tested in a specification; and finally, calculating the eddy current on the basis of the difference. The method has the advantages that physical conception is clear; a calculating process is simple; influences on losses of the magnetic cores due to different sectional areas can be effectively analyzed without the aid of a special instrument; and the method can be widely used for simulation software to simulate the losses of the magnetic cores with the different sectional areas in application of power electronics.

Description

technical field [0001] The invention relates to a calculation method for calculating the loss of magnetic cores with different cross-sectional areas, which can be widely used to guide the design of low-frequency power transformer magnetic cores, intermediate-frequency motor magnetic cores, and high-frequency converter magnetic cores. Background technique [0002] Magnetic components are one of the most important electrical components in power transformers, motors, and power electronic converters. They have a decisive influence on the efficiency and volume of the whole machine. Therefore, it is necessary to estimate the approximate range of core loss caused by different working conditions in the early design stage of the project, and reasonably carry out the thermal design of the converter, which can effectively shorten the development cycle and avoid unnecessary economic losses. [0003] Magnetic core materials are widely used in the design of magnetic components. According ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 周岩孙爱鸣谢俊
Owner NANJING UNIV OF POSTS & TELECOMM
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