Method and device for determining magnetic core loss for integrated circuit current saturation distortion
An integrated circuit and magnetic core loss technology, applied in the direction of measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., to achieve the effect of convenient and accurate magnetic core loss
Active Publication Date: 2022-07-05
北京智芯仿真科技有限公司
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[0004] The present application provides a magnetic core loss determination method and device for integrated circuit current saturation distortion, in order to solve or partially solve the above-mentioned problems involved in the background technology or at least one other deficiency in the prior art
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[0033] For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the present application and are not intended to limit the scope of the present 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.
[0034] In the drawings, the size, size, and shape of elements have been slightly adjusted for ease of illustration. The drawings are examples only and are not drawn strictly to scale. As used herein, the terms "approximately," "approximately," and similar terms are used as terms of approximation, not of degree, and are intended to describe measurements that would be recognized by those of ordinary ...
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A core loss determination method and apparatus for integrated circuit current saturation distortion may include applying a current having a saturation distortion waveform to a magnetic core of an inductive element for an integrated circuit power system, wherein the current changes periodically. Under the action of the current, multiple characteristic points of the magnetic hysteresis loop of the magnetic core are collected, wherein the magnetic hysteresis loop represents the changing 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, 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 can avoid 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 way to determine 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 magnetic core loss for current saturation distortion of integrated circuits. Background technique [0002] The core loss of the inductance element of the system-level integrated circuit power supply system has nonlinear characteristics, which makes the calculation process more difficult, and of course it is difficult to obtain a relatively accurate core loss value. Traditionally, estimating the core loss of an inductive component has generally used the Steinmetz formula, which is in is the average power loss per unit time under the unit volume of the magnetic core, k, α and β are all coefficients related to the magnetic core material, f is the operating frequency of the transformer under sinusoidal excitation, B max Maximum flux density for transformer core operation under sinusoidal excitation. However, the Stei...
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IPC IPC(8): G01R27/26
CPCG01R27/2694
Inventor 王芬
Owner 北京智芯仿真科技有限公司