Power Electronics 2 : H5CPE2

Dr Christian Klumpner

Below you will find useful information for the PE2 module, previously taught by Professor Jon Clare,  which I am teaching now (starting with the autumn of 2004). By the end of the course (2004), I intend to finalize the process begun by Prof. Clare of transferring gradually into an electronic format most of his hand notes. Additionally, I encourage the students to install one of the simulation packages recommended below and to run the examples provided on this webpage, which have been tested with the demo version of the simulation software. Currently, only PSIM simulation models are available but later I hope to be able to provide also PSPICE models.

Module Description 2004

• Module description (Word)

 NEW Course Materials (Autumn 2004) in Chronological Order (click on the underlined item)

• 1st Course (PowerPoint): 

Review of 3-phase supply, R, L, C behavior, why is needed sinusoidal voltage, why is used 3-phase power grid  -     PSIM model for 3-phase voltage systems&loads   -    Screen shot for 3-ph voltage systems&load

• 2nd Course (PowerPoint):

3-ph Diode Rectifier - Ideal model, Measures of Power Quality, 3-ph Diode rectifier considering inductive power grid    -     PSIM model for distorted waveform   -   Screen-shot distorted waveform

• THYRISTOR RECTIFIERS

Thyristor basics   -     3rd Course   -    6-pulse fully controlled rectifier (no pictures)   -   6-pulse fully controlled rectifier (with pictures)    -   Notching   -    Inverting and notching example plot   -      Controlled bridge and cycloconverter   -    PSIM model of fully ctrl bridge   -     PSIM model of half controlled bridge   -     PSIM model of 3-ph AC phase controlled chopper (Softstarter)   -     Screen-shot Motor start Direct-on-LINE   -     Screen-shot Motor start ramp-up voltage   -     PSIM model of 3-ph/1ph cycloconverter

• SMOOTHING

Smoothing (no pictures)  -    Smoothing (with pictures)   -     Inductive smoothing&continuous current    -   Inductive smoothing&discontinuous current  -   Capacitive smoothing&discontinuous current   -    Capacitive smoothing analysis   -   Inductive smoothing example   -   Capacitive  smoothing example   -   PSIM model of capacitive smoothing   -   Screen-shot capacitive smoothing  -   PSIM model of L-C smoothing   -   Screen-shot LC discontinuous   -   Screen-shot LC continuous

• MULTIPLE PULSE RECTIFIERS

Multi-pulse Rectifier (no pictures)    -   Multi-pulse Rectifier (with pictures)    -     PSIM model of 12-pulse rectifier  -   Simulation screen-shot    -      PSIM model of Quasi 12-pulse rectifier   -      PSIM model of Quasi 18-pulse rectifier  -   Simulation screen-shot

• RESONANT CONVERTERS

Slides (no pictures)   -     Slides (with pictures)  -    Plot   -    Analysis  -   PSIM model of resonant buck converter   -   Simulation screen-shot

• INVERTERS

Slides (no pictures)   -     Slides (with pictures)   -    PWM basics   -    Triangular PWM  -    DC/AC harmonics relationship  -  Wave&spectrum for square wave/2-level PWM/3-level PWM  -     PSIM model for PWM modulation (H-bridge)   -   Simulation screen-shot (3-phase PWM bridge)

• PWM RECTIFIERS

Slides    -     waveform for AC/DC power flow        waveform for DC/AC power flow    -     Example Sheet 3   -    Solutions (Ex. Sheet 3)    -    PSIM model for PWM rectifier (H-bridge without DC voltage control)   -   Simulation screen-shot    -    PSIM model for PWM rectifier (half bridge with DC voltage control)   -   Simulation screen-shot

• HIGH POWER INVERTERS

Slides    -     PSIM model for Multilevel Inverter with cascaded H-bridges    -     Simulation screen-shot (cascaded)   -     PSIM model for 4-level Diode Clamped Multilevel Inverter    -     Simulation screen-shot (Diode Clamped)   -     PSIM model for 4-level Flying Capacitor Multilevel Inverter    -     Simulation screen-shot (Flying Cap)  -   Simulation screen-shot FFT output voltages

• INTRODUCTION TO DIRECT POWER CONVERSION (last course- not required for the exam!!)

Download PSIM demo software here. In case you have problems using it, read the PSIM-User's Manual

NEW Example Sheets (Word) and Solutions (PDF)

• Example Sheet 1 (Rectifiers&Smoothing)  and Solutions (Example Sheet 1)
• Example Sheet 2 (Resonant Converters) and Solutions (Example Sheet 2)
• Example Sheet 3 (PWM&High power factor rectifiers)  and Solutions (Example Sheet 3) Additionally, you can check this solution sheet3 which has more comments included.

Past examination papers (Word) and solutions (PDF)

• 2000-2001
• 2001-2002 and Solutions(2001-2002)
• 2002-2003 and Solutions(2002-2003)
• 2003-2004 and Solutions(2003-2004)

3-phase Waveform Template - not as good as original, but usable

• 3-phase waveform template (Word)

Handouts (Powerpoint) from Professor Jon Clare (blank space for figures)

• Review of 3-phase
• Measures of power quality
• 6-pulse fully controlled rectifier
• Rectifier smoothing
• Multi-pulse rectifiers
• Resonant converters
• Zero voltage switched forward converter
• Inverters
• High power inverters

Handouts (Word) from Professor Jon Clare

• Thyristor basics
• Inductive smoothing worked example
• Inverter harmonic relationships
• PWM description
• High power factor rectifiers
• H-bridge rectifier analysis

Waveform handouts (PDF) from Professor Jon Clare

• Inductive smoothing - continuous current
• Inductive smoothing - discontinuous current
• Capacitive smoothing

Simulation Models developed for the demo version of PSIM

• 3-phase power system: voltages, currents, powers, total power
• 3-phase diode rectifier with constant current load - Ideal case
• 3-phase diode rectifier taking into account the line side inductance
• voltage distortion caused in PCC by a 3-phase rectifier due to overlap commutation 
• 1-phase thyristor rectifier with RL load (useful to learn how a thyristor operates)
• 3-phase fully controlled thyristor rectifier
• 3-phase half-controlled thyristor rectifier
• 3-phase fully controlled thyristor rectifier operating as a cycloconverter
• Diode rectifier with capacitive smoothing 
• Diode rectifier with L-C smoothing
• 12-pulse rectifier with star&delta secondary transformer
• Quasi 12-pulse rectifier with three autotransformers 
• Quasi 18-pulse rectifier with three autotransformers 
• Resonant buck converter
• PWM modulation for an H-bridge inverter
• PWM rectifier implemented with an H-bridge type inverter without DC voltage control
• PWM rectifier implemented with a half bridge type inverter with DC voltage control
• Multilevel Inverter with cascaded H-bridges
• 4-level Diode Clamped Multilevel Inverter
• 4-level Flying Capacitor Multilevel Inverter

Simulation DEMO software packages 

• PSIM 6 (Powersim Technologies Inc) or unzip this
• PSPICE 9 (Orcad) (27 MBytes)

Links to useful web resources accessible for  free (Short courses, Design notes, etc.)

• Application Manual - Power Modules (Semikron)
• Switch-Mode Power Supplies (Philips)
• Power Control with Thyristors and Triacs (Philips)

   Last update: 17 March 2005