Method and device for determining magnetic core loss of inductance element in integrated circuit power supply system
A technology of integrated circuits and inductance components, which is applied in the field of determination of magnetic core loss, can solve the problems of residual loss and inaccuracy, and achieve the effect of convenient and accurate magnetic core loss
Active Publication Date: 2022-01-07
北京智芯仿真科技有限公司
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Problems solved by technology
However, in practice between 0 and rT time period, due to the relaxation phenomenon will lead to a certain residual loss
In summary, when the input current waveform is distorted and DC biased, it is still inaccurate to use the generalized Steinmetz formula to calculate the core loss
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[0044] For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are descriptions of exemplary embodiments of the application only, and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.
[0045] In the drawings, the size, dimensions, and shapes of elements have been slightly adjusted for illustrative purposes. The drawings are examples only and are not strictly drawn to scale. As used herein, the words "approximately," "approximately," and similar words are used as words of approximation, not of degree, and are intended to describe measurements that would be recognized by those of ordinary skill in the art. Or inh...
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The present application proposes such a method for determining the magnetic core loss of the inductive element in the integrated circuit power supply, which may include: applying a current with periodic changes to the magnetic core of the inductive element used in the integrated circuit power supply system. Under the action of current, multiple characteristic points of the hysteresis loop of the magnetic core are collected, wherein the hysteresis loop represents the relationship between the magnetic field intensity acting on the magnetic core and the magnetic induction intensity generated by the magnetic core. According to a plurality of characteristic points, the parameters for fitting the S-curve of the hysteresis loop are determined to obtain the equation of the hysteresis loop. According to the equation of the hysteresis loop, and based on the definition of core loss, the hysteresis loop is integrated to determine the average power loss of the core. The present application avoids the problem in the prior art that it is difficult to accurately obtain the magnetic core loss under the condition of DC bias, and provides a convenient and accurate method for determining the magnetic core loss of the inductance element.
Description
technical field [0001] The present application relates to the technical field of integrated circuits, and in particular to a method and device for determining the core loss of an inductive element in an integrated circuit power supply system. Background technique [0002] The magnetic core loss of the inductance element of the system-level integrated circuit power system has nonlinear characteristics, so that the calculation process is more difficult, and of course it is difficult to obtain a more accurate magnetic core loss value. Traditionally, the Steinmetz formula is used to estimate the core loss of an inductive component, namely ,in is the average power loss per unit time per unit volume of the magnetic core, k, and Both are coefficients related to the core material, f is the transformer operating frequency under sinusoidal excitation, It is the maximum magnetic flux density of the transformer core under sinusoidal excitation. However, the Steinmetz formula i...
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IPC IPC(8): G01R33/12
CPCG01R33/123
Inventor 王芬
Owner 北京智芯仿真科技有限公司