EPE Association: NORpie 2006 - Topic 04: Teaching and Learning

NORpie 2006 - Topic 04: Teaching and Learning
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2006 > NORpie 2006 - Topic 04: Teaching and Learning

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   Power electronics design laboratory exercise for last-year M.Sc students
By T. Thiringer; R. Karlsson; T. Undeland; L. Max [View]
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Abstract: This paper presents experiences and results from a project task in power electronics for students at Chalmers University of Technology, Göteborg, Sweden, based on a fly- back test board. The board is used in the course Power Elec- tronics 2. In the project task, the students design snubber circuits, improve the control of the output voltage, improve the gate drive of the main MOSFET transistor and study the influence of stray inductance. The student project is di- vided into smaller steps. The project goals are given but the procedure of how to define and to obtain the results is not specified. Instead the students have to make their own spec- ification in order to reach the goals. "Tools" that are given to the students are the hardware, measurement equipment, an example of the circuit in the circuit simulation software PSpice, and in addition lectures covering the items needed in order to obtain the project goals. The project formula- tion is build on the ideas from the CDIO-initiative, where the students are encouraged to think in a complete process structure. The results found was a substantial engagement by the students, with both positive and negative reactions from the students. The negative reactions were mainly that the project specification was too vague, i.e. when the students encountered the (C=Conceive)-phase of the CDIO struc- ture.

   Hidden Knowledge of EMC – How to Utilize It?
By M. Koski; J-P Ström; H. Muittari; P. Silventoinen [View]
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Abstract: Pulse width modulated variable-speed AC drives cause a lot of EMI problems in their operation environment. EMI noise is induced on wide frequency range used in IGBT drives, especially if unshielded cables are used. Common-mode voltages and bearing currents lead to faster bearing wear. More dielectric strength is demanded from the insulation system of a motor. During the time, implementing these applications into different kind of industry environment creates a huge knowledge potential about the practical problems that different assembly cultures and legislations create for the frequency converter manufacturers. The problem is how to utilize and share this knowledge inside and outside the organization effectively. In this paper, the method implemented is based on gathering information by interviews and sharing it in a workshop.

   Electrical Engineering Laboratory Project: Using a CD-ROM Brushless DC Motor in a Model Airplane
By M. Tuunanen; V. Särkimäki; R. Tiainen [View]
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Abstract: This paper describes an electrical engineering laboratory work suitable for all power electronics and control systems students as well as embedded systems students. In this laboratory work, a sensorless brushless permanent magnet DC motor controller is designed and simulated using Simulink™ and controlled with dSpace™ or a microcontroller. Electronic needed for the controller and a suitable BLDC motor and its modification is presented.

   A GUI for Analog Controller Design for SMPS
By K. Stoychev Kostov [View]
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Abstract: The design of analog controllers for switched-mode power converters (SMPCs) can be a time consuming and error prone phase of the entire design. Even if the power stage parameters are well known, the controller design can be slow, iterative process. The designer has to assume some controller parameter values and calculate others. In order to better satisfy the bandwidth, phase and gain margin requirements, it is usually necessary to try different initial values and calculate repeatedly. The graphical user interface (GUI) presented in this paper can help in the SMPC controller design by calculating and displaying the converter and controller transfer functions, the control system's loop gain, bandwidth, phase and gain margins for any given combination of controller parameters.

NORpie 2006 - Topic 04: Teaching and Learning
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2006 > NORpie 2006 - Topic 04: Teaching and Learning
	[return to parent folder]

	Power electronics design laboratory exercise for last-year M.Sc students By T. Thiringer; R. Karlsson; T. Undeland; L. Max	[View] [Download]
Abstract: This paper presents experiences and results from a project task in power electronics for students at Chalmers University of Technology, Göteborg, Sweden, based on a fly- back test board. The board is used in the course Power Elec- tronics 2. In the project task, the students design snubber circuits, improve the control of the output voltage, improve the gate drive of the main MOSFET transistor and study the influence of stray inductance. The student project is di- vided into smaller steps. The project goals are given but the procedure of how to define and to obtain the results is not specified. Instead the students have to make their own spec- ification in order to reach the goals. "Tools" that are given to the students are the hardware, measurement equipment, an example of the circuit in the circuit simulation software PSpice, and in addition lectures covering the items needed in order to obtain the project goals. The project formula- tion is build on the ideas from the CDIO-initiative, where the students are encouraged to think in a complete process structure. The results found was a substantial engagement by the students, with both positive and negative reactions from the students. The negative reactions were mainly that the project specification was too vague, i.e. when the students encountered the (C=Conceive)-phase of the CDIO struc- ture.

	Hidden Knowledge of EMC – How to Utilize It? By M. Koski; J-P Ström; H. Muittari; P. Silventoinen	[View] [Download]
Abstract: Pulse width modulated variable-speed AC drives cause a lot of EMI problems in their operation environment. EMI noise is induced on wide frequency range used in IGBT drives, especially if unshielded cables are used. Common-mode voltages and bearing currents lead to faster bearing wear. More dielectric strength is demanded from the insulation system of a motor. During the time, implementing these applications into different kind of industry environment creates a huge knowledge potential about the practical problems that different assembly cultures and legislations create for the frequency converter manufacturers. The problem is how to utilize and share this knowledge inside and outside the organization effectively. In this paper, the method implemented is based on gathering information by interviews and sharing it in a workshop.

	Electrical Engineering Laboratory Project: Using a CD-ROM Brushless DC Motor in a Model Airplane By M. Tuunanen; V. Särkimäki; R. Tiainen	[View] [Download]
Abstract: This paper describes an electrical engineering laboratory work suitable for all power electronics and control systems students as well as embedded systems students. In this laboratory work, a sensorless brushless permanent magnet DC motor controller is designed and simulated using Simulink™ and controlled with dSpace™ or a microcontroller. Electronic needed for the controller and a suitable BLDC motor and its modification is presented.

	A GUI for Analog Controller Design for SMPS By K. Stoychev Kostov	[View] [Download]
Abstract: The design of analog controllers for switched-mode power converters (SMPCs) can be a time consuming and error prone phase of the entire design. Even if the power stage parameters are well known, the controller design can be slow, iterative process. The designer has to assume some controller parameter values and calculate others. In order to better satisfy the bandwidth, phase and gain margin requirements, it is usually necessary to try different initial values and calculate repeatedly. The graphical user interface (GUI) presented in this paper can help in the SMPC controller design by calculating and displaying the converter and controller transfer functions, the control system's loop gain, bandwidth, phase and gain margins for any given combination of controller parameters.