The following tutorial describes how to design a boundary mode flyback circuit where the circuit operates on the boundary between continuous and discontinuous conduction. A typical flyback converter is shown in FIG 1. This circuit converts 12V to a pseudo-isolated 5V and can support a load of 1A. Also well supported by the PSPICE A/D environment. The primary objective of this study is to design the flyback converter at high power and demonstrate its practicality with good performance. Flyback current-mode automated calculation spreadsheet: this is a new automated software which calculates the TL431 elements to stabilize of a flyback converter operated in peak current mode control. The software includes mode transition, sub harmonic poles and optocoupler pole contribution.

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Course-PM

ENM061 Power electronic converters lp2 HT20 (7.5 hp) 7 days to die download.

The flyback, a popular structure The flyback converter is widely used in consumer products Ease of design, low-cost, well-known struture Poor EMI signature, bulky transformer, practical up to 150 W.

Course is offered by the department of Electrical Engineering

Contact details

Lectures: Mebtu Beza (mebtu.beza@chalmers.se), Tel: 031-772 1617, Room 3519

Tutorials: Sepideh Amirpour (sepideh.amirpour@chalmers.se), Tel: 031-772 1628, Room 3566

Pspice exercises: Anton Kersten (kersten@chalmers.se), Tel: 031-772 1638, Room 3539

Anant Narula (anant.narula@chalmers.se), Tel: 031-772 1655, Room 3535

Junfei Tang (junfei.tang@chalmers.se), Tel: 031-772 1663, Room 3544

Vineetha Puttaraj (vineetha@chalmers.se), Tel: 031-772 6755, Room 2544

Mostafa Kermani (mostafa.kermani@chalmers.se ), Tel: 031-772 1951, Room 3531

Practical labs: Anant Narula (anant.narula@chalmers.se), Tel: 031-772 1655, Room 3535

Meng-Ju Hsieh (mengju.hsieh@chalmers.se ), Tel: 031-772 1650, Room 3510

Civilization vi – civilization & scenario pack bundle. Vineetha Puttaraj (vineetha@chalmers.se), Tel: 031-772 6755, Room 2544

Robert Karlsson (robert.karlsson@chalmers.se), Tel: 031-772 1646, Room 3564

Introduction

Power electronics deals with the conversion of electrical energy by applying solid state electronics. Power electronic converters can be applied in many different areas such as computers, electric vehicles and power systems. The course presents an introduction to the different circuits used to convert and control electrical energy. It also covers methods for designing converters which in combination with selection of suitable converter topologies, power semiconductors and passive components will give the students a basic knowledge of power electronic converters.

Course purpose

The main goal of the course is to make the students familiar with the operating principles of the most common power electronic converter topologies. Basic converter design, analysis of wave-shapes and efficiency calculations are among the items that the students will be able to perform after having participated in the course. The students will perform both simulations using Cadence PSpice as well as experimental work on real DC/DC-converters. The course also lays the foundation for the continuation course 'ENM070 - Power Electronic Devices and Applications'. The items treated in the course are also useful for engineering work in many different areas, e.g. design of power supplies, electric drive systems or power system applications.

Schedule on TimeEdit:

Course literature

Mohan, Undeland, Robbins, Power Electronics - Converters, Applications and Design, Wiley 2003, 3^rd ed.

Extra handouts will be uploaded to the course page in canvas during the course.

Course content and organization

Lectures and tutorials:

Review: electric and mathematic prerequisites, voltage and current relations for passive components, mean and RMS-value, Fourier analysis.
Active and passive components: diodes, thyristors, MOSFETs, GTOs, IGBTs, inductors, transformers and capacitors.
DC/DC converters without isolation: buck, boost, buck-boost and the H-bridge converter.
DC/DC-converters with isolation: flyback, forward, half-bridge, push-pull and the full-bridge converter.
DC/AC-generation: single-phase and three-phase AC-generation, square-wave and PWM-modulated inverters, multilevel inverters.
Diode rectifiers: single- and three-phase diode rectifiers with continuous and discontinuous DC-side current.
Thyristor converters: single- and three-phase thyristor rectifiers with varying DC-side load.
Converter enhancements: dynamic modeling, controller design, and improved configurations
Heat distribution and life-time: Loss calculations, thermal calculations, cooling requirements and component life-time.

Laboratory experiments (compulsory):

All home assignments must be prepared before each lab. The lab-PM can be downloaded from the course website at least one week in advance of each occasion.

Buck converter
Flyback converter

PSpice assignments (compulsory):

All home assignments must be prepared before each occasion. The simulation files can be downloaded from the course website one week in advance of each occasion.

A basic power electronic circuit
Buck and Boost converter
Flyback converter
Single-phase inverter
Three-phase inverter
Single- and three-phase diode rectifier
Converter enhancements: Loss analysis and control

Before each PSpice occasion (12.30-13.15) there is an additional time slot for approval of previously completed PSpice tasks (location - check signedup group). Please use this to avoid crowding during the lab occasions.

The course consists of approximately:

18 lectures (2 x 45min)
13 tutorials (2 x 45min)
2 practical laborations (4h)
7 PSpice computer assignments (2h)

Changes made since the last occasion

Lectures and tutorials will be online

Learning objectives and syllabus

Learning objectives:

Determine Fourier components and total harmonic distortion (THD) for basic current and voltage wave-shapes.
Recognize the operating principle of the most common active components (e.g. diode, thyristor, IGBT, and MOSFET) as well as the most common passive components (e.g. capacitors, transformers and inductors).
Explain and exemplify how pulse width modulation (PWM) works. Describe the purpose as well as the means to control the desired quantity and recognize the need for a controller circuit within the power electronic converter.
Analyze and perform analytical calculations of ideal DC/DC converters such as the buck, boost, buck-boost, flyback and the forward converter. The operating principle of each topology is differentiated and thoroughly evaluated in both continuous and discontinuous conduction mode by its current and voltage wave-shapes. In addition to this, other topologies (e.g. the push-pull, half-bridge and full-bridge converter) and circuit enhancements (e.g. converter interleaving) are exemplified.
Describe the basic operating principle of both single-phase and three-phase DC/AC inverters. Different modulation strategies (e.g. PWM and square wave operation) are implemented and the resulting current and voltage waveforms are evaluated and compared.
Explain the operation of multilevel converters (e.g. 3-level and 5-level NPC and MMC topologies) by current and voltage waveform analysis and apply the benefits and drawbacks to e.g. harmonics and losses.
Perform calculations on single- and three-phase diode rectifiers operating with voltage-stiff and current-stiff DC-side. Apply the concept of line impedance within the converter circuit (current commutation) and evaluate the influence.
Perform calculations on single- and three-phase thyristo

Flyback Converter Design In Pspice Tutorial