IEEE PEDS 2017 Tutorials

IEEE PEDS 2017 is offering the following tutorial session free of charge, provided that you have already registered with the conference technical sessions. The tutorial sessions do not provide any tea breaks or lunch.

Date Time Speakers Title
12 December 2017
Tuesday
09:00 AM – 01:00 PM Prof. Ralph Kennel

Electrical Drive systems and Power Electronics, Technical University of Munich, Germany
Predictive Control – A Simple and Powerful Method to Control Power Converters and Drives
12 December 2017
Tuesday
02:00 PM – 06:00 PM Prof. Ralph Kennel

Electrical Drive systems and Power Electronics, Technical University of Munich, Germany
Encoderless Control of Synchronous Machines – State of the Art as well as Realistic and Unrealistic Expectations
12 December 2017
Tuesday
09:00 AM – 01:00 PM Prof. Huai Wang
Prof. Frede Blaabjerg

Center of Reliable Power Electronics (CORPE), Aalborg University, Denmark
Capacitors in Power Electronics Applications — Reliability and Circuit Design
12 December 2017
Tuesday
02:00 PM – 06:00 PM Prof. Longya Xu
Prof. Jin Wang
Prof. Yi Huang

Center for High Performance Power Electronics, Ohio State University, USA
Electric Machines and Wide Bandgap Power Electronics for High Speed High Performance Electric Machine Drives

Tutorial 1: Predictive Control – A Simple and Powerful Method to Control Power Converters and Drives

Date / Time: 12 December 2017 / 09:00 AM – 01:00 PM

Prof. Ralph Kennel
Electrical Drive systems and Power Electronics,
Technical University of Munich,
Germany



                

Synopsis

Up to now, the control of electrical power using power converters has been based on the principle of mean value, using pulse width modulation with linear controllers in a cascaded structure.

Recent research works have demonstrated that it is possible to use Predictive Control to control electrical energy with the use of power converters, without using modulators and linear controllers. This is a new approach that will have a strong impact on control in power electronics in coming decades.

The main advantages of predictive control are:

The participants of this tutorial will learn


Tutorial 2: Encoderless Control of Synchronous Machines – State of the Art as well as Realistic and Unrealistic Expectations

Date / Time: 12 December 2017 / 02:00 PM – 06:00 PM

Prof. Ralph Kennel
Electrical Drive systems and Power Electronics,
Technical University of Munich,
Germany



                

Synopsis

Field-oriented control of AC drives requires knowledge of the mechanical rotor position. Generally, this is detected by a position encoder, which has to be mounted on the shaft of the servo motor. In cost sensitive applications, however, when maximum performance is not required (for instance in traction drives), it is desirable to save this expensive sensor. Besides the cost advantage, encoderless control convinces with high mechanical robustness, as no sensitive electronic components are present in the machine.

There are two main methods for encoderless position detection, the first is based on using the basic equations of the electrical machine (evaluating the back-EMF), whereas the second is based on additional signal injection. The back-EMF based methods typically detect the mechanical position by integration of the induced voltage, which is estimated with an asymptotic observer at nonzero speed. Around zero frequency, however, this method does not work in practice – here it is necessary to use a different method using high frequency signals to detect the rotor position. The resulting amplitude modulated information in the HF current is used to find what is called the anisotropy position, from which the rotor position may be estimated.

High frequency injection methods are becoming more and more attractive. These methods generally interact with the saliencies (magnetic anisotropies) of an electrical machine obtaining the desired rotor position by demodulation methods. Saliencies are well-known when using Interior Permanent Magnet Machines or Synchronous Reluctance Machines. The most recent progress in this area is the encoderless control of synchronous machines with surface mounted permanent magnets. The saliency to be detected in this type of electrical machine is very small (< 5 %). In spite of that difficulty it is possible to design a encoderless control without the need of additional voltage sensors and with a behavior independent from any parameters of the electrical machine.

The main advantages of encoderless control are:

The main challenges in encoderless control are:

The participants of this seminar will understand:


Tutorial 3: Capacitors in Power Electronics Applications – Reliability and Circuit Design

Date / Time: 12 December 2017 / 09:00 AM – 01:00 PM

Prof. Huai Wang
Center of Reliable Power Electronics (CORPE),
Aalborg University,
Denmark



Prof. Frede Blaabjerg
Center of Reliable Power Electronics (CORPE),
Aalborg University,
Denmark



Synopsis

Capacitors are one of the key components in typical power electronic systems in terms of cost, volume, and reliability. Power electronics applications are consuming unprecedented quantities of electrolytic capacitors, film capacitors, and ceramic capacitors. This tutorial aims to discuss the modeling and reliability analysis of capacitors in circuit designs from an application perspective. The criteria for sizing the DC-link capacitors and AC filter capacitors will be presented. It takes into account the steady-state performance, transient and stability performance of power electronic converters under both normal and abnormal operations. Mission profile based electro-thermal -lifetime modeling of capacitors in power electronics applications will be discussed. Different capacitance minimization techniques and its impact on system level reliability, volume, and cost will be covered. A few step-by-step examples of capacitor sizing and optimization for Photovoltaic inverters, solid-state-transformers, motor drives, and modular multi-level converters will be discussed. The results to be presented in this tutorial are the latest research outcomes from the Center of Reliable Power Electronics (CORPE) at Aalborg University, which are also the common interest for the companies involved in the research center.


Tutorial 4: Electric machines and wide bandgap power electronics for high speed high performance electric machine drives

Date / Time: 12 December 2017 / 02:00 PM – 06:00 PM

Prof. Longya Xu
Center for High Performance Power Electronics,
Ohio State University,
USA



                
Prof. Jin Wang
Center for High Performance Power Electronics,
Ohio State University,
USA



Prof. Yi Huang
Center for High Performance Power Electronics,
Ohio State University,
USA



Synopsis

The demands being place upon high speed and high power density electric machine drive systems continues to grow as multiple industry sectors look to cut costs and improve power density and efficiency. For this reason, researchers have been evaluating different electric machine topologies and new generation of wide bandgap based power electronics circuits to meet the immediate needs of industry and satisfy future requirements.

The following tutorial provides a summary of current development of high speed and high power electric machines and wide bandgap (WBG) based power electronics. It caters to professionals at the intermediate level. Audience members should be aware of basic electric machine topologies, control strategies, power electronics devices and circuits, but be interested in more recent developments.

Excluding an introduction and conclusion, this tutorial is broken up into five specific topics: