Magnetic core loss determination method and device for current cut-off distortion of integrated circuit
A technology of core loss and cut-off distortion, which is used in measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., to achieve the effect of convenient and accurate core loss
Active Publication Date: 2022-01-14
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 cut-off 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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[0032] 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.
[0033] 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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Provided are a magnetic core loss determination method and device for current cut-off distortion of an integrated circuit. The method may include the steps of: applying a periodically varying current having a cut-off distortion waveform into a magnetic core of an inductive element for an integrated circuit power supply system; under the action of the current, collecting a plurality of feature points of a hysteresis loop of the magnetic core, the hysteresis loop representing the change relation between the intensity of a magnetic field acting on the magnetic core and the magnetic induction intensity generated by the magnetic core; determining parameters for fitting an S curve of the hysteresis loop according to the plurality of feature points so as to obtain an equation of the hysteresis loop; and integrating the hysteresis loop according to the equation of the hysteresis loop and based on the definition of the magnetic core loss, so as to determine the average power loss of the magnetic core. The problem that the accurate loss of a magnetic core loss is difficult to obtain under the condition of direct current bias in the prior art can be avoided, and a convenient and accurate mode is provided for determining the magnetic core loss of an inductive element.
Description
technical field [0001] The present application relates to the technical field of integrated circuits, in particular to a method and device for determining magnetic core loss for integrated circuit current cut-off distortion. 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 under the unit volume of the magnetic core, k, α and β are coefficients related to the magnetic core material, f is the transformer operating frequency under sinusoidal excitation, B max It is the maximum magnetic flux density of the transformer core under sinusoidal excitation. However, the Steinmetz formula is on...
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CPCG01R27/2694
Inventor 王芬
Owner 北京智芯仿真科技有限公司