Easily teach you to understand the distribution parameters of magnetic components such as switching power supplies

Please follow me to look at the following 22 pictures, and then you will understand the distribution parameters of magnetic components such as switching power supplies~

Power magnetic components in power converters

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Function: It plays the role of magnetic energy transfer and energy storage, an indispensable element

Features: large volume, heavy weight, large loss, great influence on circuit performance

Challenge: It has a great impact on the power density of the converter and has become a development bottleneck

Power converter technology and magnetic components

Topology: forward, flyback, push-pull, full-bridge phase shift, LLC, etc., magnetic integration, magnetic coupling;

Control: control chip + control circuit, transformer link + filter link;

Package: PCB winding, winding + synchronous MOS, ultra-thin magnetic components;

Components: active devices, capacitors, magnetic components (design + customization);

Simulation: circuit model, device model (IC, MOS, Diode, Cap, magnetic components);

Electromagnetic compatibility: layout, EMI filter, distributed parameters, near-field coupling;

Manufacturing: automation, magnetic components (manually made)

Quality: magnetic component test, failure analysis.

Models of magnetic components

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Transformer model

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Inductor model

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Actual working waveform of flyback converter

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Waveform and transformer parameters under DCM

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Waveform and transformer parameters under CCM

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Influence of Inductance Distributed Capacitance EPC on Loss

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Distribution characteristics of magnetic field/eddy current field in transformer

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Eddy current loss characteristics of copper foil conductor

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Reducing the winding loss of the transformer-basic structure considerations

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Distribution of magnetic field and current density of different winding structures

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Distributed capacitance of winding EPC

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Formation Mechanism of Distributed Capacitance of Inductance Winding

The influence of different winding methods of inductance winding on distributed capacitance

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The basic method of distributed capacitance calculation

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Approximate theoretical calculation of coil distributed capacitance

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Distributed capacitance of multilayer coil

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Winding distributed capacitance with shielding layer

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Distributed capacitance characteristics of segment windings

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The charge distribution and distributed capacitance inside the transformer

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The charge distribution inside the transformer with shielding layer

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Cancellation design of transformer secondary side charge

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in conclusion

Magnetic component technology is very important for power converters; the distribution parameters of magnetic components have an important impact on circuit performance (efficiency, power density and reliability); from the level of magnetic field, electric field and eddy current field inside the magnetic component, it can be more in-depth Completely understand the parameters of magnetic components.

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