Decibels Lab

Course overview

Expected goals

Course requirements and prerequisites

Course audience

Completing the course

How to use Discussions option

Completing the course

Piracy & infringement warning

Introduction

Inductor Basics

Magneto motive force of a coil

Flux in the core of an inductor

Solving magnetic circuits

B-H Equation

B-H curve

Approach to modeling an inductor

Installing the circuit simulator

Getting started with simulating a resistor-inductor (R-L) circuit

Simulating the inductor from the library

Creating the custom inductor component

Simulating the custom inductor component

Numerical integration techniques and output impedance impact

Simulating an inductor with the magnetic core details

Simulating an inductor core with an air gap

Conclusions

Introduction

Concept of magnetic coupling

Transfer of energy between coupled coils

Expressing coupling between coils mathematically

Mutual inductance

Approach to modeling coupled inductors

Editing the schematics of the coupled inductor simulation

Coding the magnetic circuit of the coupled inductors

First analysis of coupled inductor simulation results

No load simulation showing input power factor and magnetization current

Short circuit of the second coil with voltage collapse

Impedance matching

Connecting an R-L load to the output coil

Impedance matching of the output coil for the R-L load

Simulating coupled coils with different number of turns

Simulating coils wound in opposing senses

Expressing equations in a matrix form

Converting a matrix to upper triangular form

Solving matrix equations

Optimizing the solution method

Conclusions

Introduction

Transformer basics

Transformer winding inductances

Transformer winding turns ratio

Setting up the transformer simulation

Editing transformer circuit parameters

Transformer model configuration and control code

Coding the transformer parameters

Verifying control code and interpreting parameters

Running the transforming simulation and verifying the results

Transformer inrush current

Simulating a step-up transformer

Understanding current transformation in transformers

Including the core loss component in the simulation model

Dot polarities in transformer windings

Simulating a transformer with opposing dot polarities

Multi winding transformer - creating circuit schematics

Editing circuit parameters of a multi winding transformer

Editing the magnetic model of a multi winding transformer

Analyzing the simulation results of a multi winding transformer

Conclusions

Introduction

Applications of power converters

Flyback converter topology and operation

High frequency transformers

Creating the circuit of a flyback converter

Editing the circuit parameters of the flyback converter

Using Pulse Width Modulation to control the switch

Verifying the switched voltage across the primary of the flyback transformer

Modifying the dot polarities of the flyback transformer

Coding the parameters of a high frequency transformer

Solving simulation instability by decreasing integration time step

Observing the transformer winding voltages

Observing the charge and discharge of the output capacitor

Examining transient waveforms of the output

Conclusions

Conclusions