| 1. |
- Ehnberg, Jimmy, 1976, et al.
(författare)
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CONTINUOUS ASSESSMENT IN ELECTRICAL POWER ENGINEERING FOR MARINE ENGINEERS
- 2023
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Ingår i: SEFI 2023 - 51st Annual Conference of the European Society for Engineering Education: Engineering Education for Sustainability, Proceedings. ; , s. 1992-2000
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Konferensbidrag (refereegranskat)abstract
- To tackle the climate challenge, all sectors need to contribute, including electrified shipping. Electrified shipping is not only propulsion but also loading and unloading equipment. This transformation requires increased skills and understanding of electric power engineering for the personal onboard, not least for the marine engineers. Therefore, a changed in the curriculum was needed. However, when more theoretical course content was added to two consecutive courses, the student view and passing rate dropped. Although the student view improved quickly, the passing rate recovered slower. To address this issue, continuous assessment was introduced to counteract the drops. The aim of this study was to evaluate the theoretical parts and determine if continuous assessment could contribute to improve student learning and increase passing rate. The students expressed satisfaction with the changes, and the passing rate has increased. Most students also claimed that they learned more compared to standard assessment methods.
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| 2. |
- Ehnberg, Jimmy, 1976, et al.
(författare)
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Introducing Ethics by IEEE Code of Ethics in International Electrical Power Engineering Education
- 2022
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Ingår i: Proceedings of the 2022 31st Annual Conference of the European Association for Education in Electrical and Information Engineering, EAEEIE 2022.
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Konferensbidrag (refereegranskat)abstract
- Ethical awareness has generally increased in the society and specifically for engineers. The examples of where it went wrong, or where ethical dilemmas occur, have been more frequent in the later years. To be able to prepare future engineers in their future carriers, the subject needs to be integrated in university studies. This is hard to do because not all students see the importance for them, seeming instead to rely on technology itself to present solutions. The aim of our study was to introduce the use of the IEEE code of ethics as a relevant tool for students at an international master's program, for their future career as electric power engineers, but also to let students focus on discussion rather than listening to us teachers. The method was tested at the master program mandatory project course, with 45, 50 and 25 students in the academic year 19/20 (on-campus), 20/21 (online) and 21/22 (pre-recorded). Results showed that most of the students found the IEEE code of ethics relevant for their project and for their future career. A difference could be seen between students with a bachelor's degree from Chalmers University of Technology and those from another university, but there was improvement for both groups. The main contribution of the paper is a method to introduce ethics in electric power engineering education that can be found relevant to students and teachers with a background in electric power engineering. All the three approaches of the method showed a similar outcome which makes it possible to use the method as an effective mean to teach ethics for future electric power engineers.
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| 3. |
- Ehnberg, Jimmy, 1976, et al.
(författare)
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Master Program Curriculum in Electric Power Systems, University in Gobal South vs University in Global North
- 2024
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Ingår i: IEEE Global Engineering Education Conference, EDUCON. - 2165-9567 .- 2165-9559.
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Konferensbidrag (refereegranskat)abstract
- Renewable energy integration, electric vehicles, grid modernization, and energy security are becoming increasingly important for societies worldwide. Well-educated electric power system engineers are essential to make this happen. This comparison involves two master's programs in two different regions: the Global South and Global North. Both programs are two-year master's programs based on a series of courses in electric power systems and supporting subjects. Individual and contextual strengths and weaknesses for each program are highlighted, compared, and discussed, including the importance of adapting the programs to local contexts while addressing global challenges in power systems. However, considering the global labor market and the uncertain future, and recognizing that engineers should be professionals for several decades, the programs should not be overly tied to the local context. In conclusion, recommendations for improvement are provided for both programs based on the strengths of the other program and their shared weaknesses. For example, the Global South program should enhance specialization and collaborate more with the industry, while the Global North program should promote interaction with other programs, include more aspects related to societal impact, and provide better guidance for course selection.
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| 4. |
- Harnefors, Lennart, 1968, et al.
(författare)
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Input-admittance calculation and shaping for controlled voltage-source converters
- 2007
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Ingår i: IEEE Transactions on Industrial Electronics. - : Institute of Electrical and Electronics Engineers (IEEE). - 0278-0046 .- 1557-9948. ; 54:6, s. 3323-3334
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Tidskriftsartikel (refereegranskat)abstract
- A controlled power electronic converter can cause local instabilities when interacting with other dynamic subsystems in a power system. Oscillations at a certain frequency cannot, however, build up if the converter differential input admittance has a positive conductance (real part) at that frequency, since power is then dissipated. In this paper, input-admittance expressions for a voltage-source converter are derived. It is seen how the admittance can be shaped in order to get a positive real part in the desired frequency regions by adjusting the controller parameters.
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| 5. |
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| 6. |
- Härsjö, Joachim, 1987, et al.
(författare)
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PERMANENT MAGNET SYNCHRONOUS GENERATOR INTER TURN FAULT IDENTIFICATION USING STATOR CURRENT ANALYSIS
- 2013
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Ingår i: 9th PhD Seminar on Wind Energy in Europe, EAWE.
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Konferensbidrag (refereegranskat)abstract
- A three phase permanent magnet synchronous generator is modeled both as a FEM model and an analytically model with an additional fourth winding that represents the faulty part of the machine. The faulty part is described as a fraction of the healthy machine. The proposed method can be used for multi pole machines as a general method for calculating the inductances is shown. Simulations show that the largest contributing parameter is the fault resistance, i.e. the contact resistance of the inter turn fault. FEM and analytical simulations show similar results but with amplitude an amplitude difference.
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| 7. |
- Lundmark, Sonja, 1966, et al.
(författare)
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Experiences from a distance course in electric drives including on-line labs and tutorials
- 2012
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Ingår i: 2012 20th International Conference on Electrical Machines, ICEM 2012, Marseille, 2 September - 5 September 2012. - 9781467301428 ; , s. 3050-3055
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Konferensbidrag (refereegranskat)abstract
- This paper explains the steps taken to convert the electric drives course activities at Chalmers University of Technology to a distance course directed towards the automotive industry, including interactive remote web-labs, and on-line tutorials and computer lab sessions. A first pilot course is conducted during autumn 2011. From the course evaluation, from student results and from experience of the involved teachers during the work, it could be concluded that the first pilot course worked as planned, yielding good results in students' performance compared to the on-campus course, except for the practical lab part where students from both courses performed equally well. The web course got an average of 4.2 (out of 5.0) from the course evaluations. In order to improve the web-course, the interactivity during the practical labs should be improved.
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| 8. |
- Wallmark, Oskar, et al.
(författare)
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Input Admittance Expressions for Field-Oriented Controlled Salient PMSM Drives
- 2012
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Ingår i: IEEE transactions on power electronics. - 0885-8993 .- 1941-0107. ; 27:3, s. 1514-1520
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents analytical expressions for the converter input admittance in field-oriented controlled permanentmagnet synchronous motor (PMSM) drives. The effect of rotorsaliency is taken into consideration and the derived admittance expressions are valid for maximum-torque-per-ampere as well ashigh-speed (field weakening) operation. Experimental results illustrate the validity of the derived admittance expressions. The presented work can be used to predict dc-link voltage instabilities inPMSM drives in, e.g., railway traction, aerospace and automotive applications.
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| 9. |
- Amin, Mohammad, 1985, et al.
(författare)
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An efficient appliance for low voltage DC house
- 2011
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Ingår i: 2011 IEEE Electrical Power and Energy Conference, EPEC 2011; Winnipeg, MB; 3 October 2011 through 5 October 2011. - 9781457704048 ; , s. 334-339
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Konferensbidrag (refereegranskat)abstract
- Kitchen appliances consume large amount of energy in residential houses. By using efficient appliances energy losses can be reduced. Most of the household appliances use DC internally except some appliances such as stove, refrigerator, dishwasher and microwave oven. The refrigerator and stove is one of the high power consuming kitchen appliances and it consumes large amount of energy. This work investigated on energy efficient home appliance design to run on low DC voltage and the purpose is to reduce energy consumption and losses. A combined refrigerator stove unit is designed to run on low voltage DC. The system is simulated with Matlab / Simulink and finally a prototype is built to analyze the performance. © 2011 IEEE.
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| 10. |
- Amin, Mohammad, 1985, et al.
(författare)
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Low voltage DC distribution system compared with 230 V AC
- 2011
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Ingår i: 2011 IEEE Electrical Power and Energy Conference, EPEC 2011; Winnipeg, MB; 3 October 2011 through 5 October 2011. - 9781457704048 ; , s. 340-345
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Konferensbidrag (refereegranskat)abstract
- In this work low voltage DC distribution systems for a home are investigated by evaluating the advantages and disadvantages to 230V systems. The aim of the work is to connect the systems with local generation such as solar cell, micro turbine and energy storages at the end user level. Data obtained from measurements of power consumption for different household appliances such as refrigerator, microwave oven, rice cooker, dish washer etc. have been used to evaluate the systems. The performance of the 230V AC system and the proposed low voltage DC system is analyzed by considering factors such as losses in the wire, internal loss of the device itself, investment cost for new wiring, energy consumption cost © 2011 IEEE.
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