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
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
Transformer model
Inductor model
Actual working waveform of flyback converter
Waveform and transformer parameters under DCM
Waveform and transformer parameters under CCM
Influence of Inductance Distributed Capacitance EPC on Loss
Distribution characteristics of magnetic field/eddy current field in transformer
Eddy current loss characteristics of copper foil conductor
Reducing the winding loss of the transformer-basic structure considerations
Distribution of magnetic field and current density of different winding structures
Distributed capacitance of winding EPC
Formation Mechanism of Distributed Capacitance of Inductance Winding
The influence of different winding methods of inductance winding on distributed capacitance
The basic method of distributed capacitance calculation
Approximate theoretical calculation of coil distributed capacitance
Distributed capacitance of multilayer coil
Winding distributed capacitance with shielding layer
Distributed capacitance characteristics of segment windings
The charge distribution and distributed capacitance inside the transformer
The charge distribution inside the transformer with shielding layer
Cancellation design of transformer secondary side charge
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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