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Low-frequency electric small system design method based on hybrid time domain finite element algorithm

A design method and system design technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve problems such as low-frequency collapse, large number of time steps, and system matrix ill-conditioning

Active Publication Date: 2020-07-07
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the frequency range is below about 1MHz, for a typical low-frequency electrical system, the traditional Finite Difference Time Domain (FDTD), Finite Element Time Domain (FETD) and Pseudospectral Time Domain (PSTD) uses an explicit time integration scheme, which requires a large number of time steps because the time step is limited by the stability condition
And, if these algorithms use implicit time-stepping schemes such as Crank-Nicolson technique or Newmark-beta technique, there will be low-frequency collapse phenomenon, that is, these algorithms will have instability problems, and at the same time, their system matrices will be ill-conditioned

Method used

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  • Low-frequency electric small system design method based on hybrid time domain finite element algorithm
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  • Low-frequency electric small system design method based on hybrid time domain finite element algorithm

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Embodiment 1

[0055] see figure 1 , the embodiment of the invention provides a design method of a low-frequency electrical small system based on a hybrid time-domain finite element algorithm, the design method comprising:

[0056] Step S101, modeling the electronic device, and setting parameter information and incentives of the electronic device to set a calculation area;

[0057] Step S102, performing grid division on the calculation area by preset software, and recording the information of each unit in the calculation area;

[0058] Step S103, use the hybrid time-domain finite element algorithm to calculate and solve the unknown electric field corresponding to the information of each unit, and obtain the parameter value of the low-frequency electric small system.

[0059] In the embodiment of the present invention, the above parameter information includes: the size of the model, the relative permittivity of the model material, the relative permeability of the model material, the conducti...

Embodiment 2

[0075] When the electronic device is a spiral loop inductor, the steps of modeling the electronic device and setting the parameter information and excitation of the electronic device to set the calculation area include:

[0076] Set the number of turns of the inductor;

[0077] Set a rectangular metal frame on the inductor frame as the ground;

[0078] A port connecting the outermost ring of the inductor and the ground is set as the first receiver;

[0079] The other port connecting the center of the inductor to the ground is set as the first signal source;

[0080] Sets the size of the airbox for the first simulation to determine the first computational region.

[0081] In the embodiment of the present invention, when the electronic device is a spiral toroidal inductor, the above steps express the hybrid FETD discrete equation as a matrix equation according to the Galerkin method, and after obtaining the co-vector e including the electric field unknown through the rectangul...

Embodiment 3

[0098] In the embodiment of the present invention, when the electronic device is a wireless power transmission system, the step of modeling the electronic device and setting the parameter information and excitation of the electronic device to set the calculation area specifically includes:

[0099] Arrange three square inductance coils with a side length of 100mm side by side;

[0100] Use the square inductance coil in the middle as the second signal source, and the two square inductance coils at both ends as the second receiver;

[0101] Sets the size of the airbox for the second simulation to determine the second calculation area.

[0102] In the embodiment of the present invention, when the electronic device is a wireless power transmission system, the above steps represent the hybrid FETD discrete equation as a matrix equation according to the Galerkin method, and after obtaining the co-vector e including the electric field unknown through the rectangular equation, further...

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Abstract

The invention is suitable for the field of low-frequency electric small systems, and provides a low-frequency electric small system design method based on a hybrid time domain finite element algorithm, and the design method comprises the steps: carrying out the modeling of an electronic device, and setting the parameter information and excitation of the electronic device, so as to set a calculation region; performing mesh generation on the calculation area through preset software, and recording information of each unit in the calculation area; and calculating and solving an unknown electric field corresponding to the information of each unit by using a hybrid time domain finite element algorithm to obtain a parameter value of the low-frequency electric small system. According to the low-frequency electric small system design method based on the hybrid time domain finite element algorithm, the phenomenon of low-frequency collapse during design of low-frequency electric small systems such as a broadband inductor and a wireless power transmission system can be effectively overcome, the calculation efficiency is not influenced, and the stability of a calculation result is high.

Description

technical field [0001] The invention belongs to the field of low-frequency electronic small systems, and in particular relates to a low-frequency electric small system design method based on a hybrid time-domain finite element algorithm. Background technique [0002] With the rapid development of integrated circuits and their increasingly wide application, electronic design continues to develop towards miniaturization. Various low-frequency electrical small systems are widely used in radio frequency identification, wireless sensor networks, communication systems, wireless power transmission and other fields. Therefore, accurately and effectively simulating the behavior of low-frequency electronic small systems and related circuits is of great significance to system design. [0003] Electronic devices are traditionally designed using frequency-domain methods. In order to simulate the broadband characteristics of low-frequency electrical small systems, the present invention u...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F30/367
Inventor 柳清伙卢昕陈珂王礼晓王雪君
Owner XIAMEN UNIV