Core

Overview

In the core section you will be able to select and define the parameters of your core, as well as seeing results of the simulation regarding Core losses and magnetic flux density.

At the top of the screen you will find several drop-down menus in blue, from which you will be able to define the parameters in order to characterize your core. These are:

 

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Inductance - Launch Calculatorimage-1648214835865.png

The Inductance Calculator can be accessed through the Launch Calculator button located in the Inductance section of the screen.

The calculator has two main modes:

Accurate Mode

The default. It computes the Inductance of the magnetic taking into consideration all constructive parameters and the operating conditions.

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This mode is set by default once a simulation is created. It will compute the real inductance that the magnetic will show in the operation point once working on the converter.

For this Inductance computation, not only the geometrical and the electromagnetic properties of the selected core will be taken in to account. The whole system, including the ambient temperature, the current, the temperature on the magnetic produced due to core and winding losses, permeability, gaps distribution and fringing will be taken into consideration so the computed Inductance Value is as accurate as possible in the SOA.

In this mode the system takes all the parameters in the simulation, not only the ones in the core, but in the waveform and in the winding section. However, due to its influence and the common designing flows, the three main inputs are: The N (Primary Turns), N. Gaps (Number of gaps), Gap (Gap length for each gap).

Once these three (within the rest of the parameters in the simulation) are introduced, the new values for the L (Inductance), AL (Inductance Factor), FF (Fringing Factor) can be computed by clicking on the RUN button located on the bottom right corner of the screen.

Once it is clicked, the simulation will run and compute all the outputs of the simulation and the L (Inductance), AL (Inductance Factor), FF (Fringing Factor) that the magnetic will show in the given operating conditions.

image-1648214927813.pngThe Apply button allows, once the selection and results satisfy the needs, to apply the changes within the rest of the simulation, return to the default mode and compute the simulation of the whole magnetic. If clicked, the simulation will run completely and some of the results may vary between modes.
image-1648214996520.pngOn the other hand the Cancel button allows to undo all changes during this mode and return with the initial configuration on the Accurate Mode.

 
Iteration Mode

It allows for fast iterations, changing the degrees of freedom between L (Inductance), N (Primary Turns), N. Gaps (Number of gaps) and Gap (Gap length for each gap).

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By selecting different button modes in inductance calculator the degrees of freedom of the Inductance Calculator will change. In the Inductance Tab the main output will be the L, in N turns tab the main output will be N (Primary Turns) , and in Gap tab the main output will be the Gap (mm) length for each gap.

During this mode, no extra computations regarding the winding, losses or temperature will be carried out. Only the outputs of the inductance calculator will be processed, drastically reducing the time required to get the results and allowing fast iterations between different combinations. However, the shape and materials are also considered as inputs in this mode, so different alternatives can be explored.

Once this mode is selected, the desired output is chosen, and any value in the blue boxes is modified, the computations will be automatically triggered just by clicking somewhere else on the screen.

 

Gap Location

In addition to the above, it is also possible to determine the location of the Gap, wherever it is located in the center leg or in all the legs.

For modifying the location of the gap, the gap location selector is used.

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Core Lossesimage-1648215076897.png

At the bottom-left section of the screen you will see the simulation results regarding the core losses and magnetic flux density. Results given are:

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Core parameters

At the top of this section you will find one or two drop-down menus in blue, from which you will be able to define the parameters in order to characterize your core. These are:

If the combination of core shape and material is not listed in the manufacturer's catalogue, a warning message will appear. You will still be able to simulate the design with the previous inputs.

Stacking cores and Custom dimensions features are only available for E and U shaped cores.

Stacking cores will allow to increase the Core area while keeping the same height and width.

 

Coil Former parameters

At the top of the screen you will find several drop-down menus in blue, from which you will be able to define the parameters in order to characterize your coil former. These are:

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In the right half of the screen you will be able to see the following information about your core.

 

Run Core vs Run Core Only

At the bottom right there are two main buttons to trigger the simulation. The two options produce two type os simulations.

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Glossary

 


Revision #41
Created 17 March 2022 09:14:37
Updated 17 March 2023 10:58:06 by Paula Duque Senac