Electronic Learning Experience Setup : Power Electronics and Electrical Drive Education

2020 ◽  
Author(s):  
P.J. van Duijsen ◽  
D.C. Zuidervliet ◽  
J.B. Woudstra
Keyword(s):  
Power Electronics ◽  
Learning Experience ◽  
Electrical Drive ◽  
Electronic Learning ◽  
Electronics And Electrical

Implementation and use of a mobile lab bench for a first course in power electronics

2020 ◽  
pp. 002072092092847
Author(s):  
Bora Karayaka ◽  
Robert Adams ◽  
Paul Yanik
Keyword(s):  
Student Engagement ◽  
Student Retention ◽  
Student Learning ◽  
Power Electronics ◽  
Learning Experience ◽  
Laboratory Setting ◽  
Learning Enhancement ◽  
Relevant Theory ◽  
Alternative Approaches

Although practice by doing is typically regarded to be an effective method to facilitate student learning in a laboratory setting, stretched resources may require alternative approaches to accommodate students and to promote student retention. A portable multipurpose lab bench is presented that facilitates student learning by incorporating demonstration and discussion in a lab environment. In a first course for power electronics, improved student engagement and learning enhancement were targeted through the use of this single bench cohesively with classroom presentations and relevant theory. Laboratory assessments and end of course surveys for two consecutive years were collected to assess the learning experience as well as the effectiveness of the established mobile lab bench concept.

Electronic Torsional Vibration Elimination for Synchronous Motor Driven Turbomachinery

2011 ◽  
Author(s):  
Christof Sihler ◽  
Simon Schramm ◽  
Valerio Rossi ◽  
Andrea Lenzi ◽  
Valerio Depau
Keyword(s):  
Mechanical System ◽  
Power Electronics ◽  
Torsional Vibration ◽  
Oil And Gas Industry ◽  
Torque Ripple ◽  
Air Gap ◽  
Vibration Measurement ◽  
Vibration Level ◽  
Variable Speed ◽  
Electrical Drive

The oil and gas industry has a growing demand for electrically driven trains operated at variable speeds. Variable frequency electrical drives enable increased operational flexibility and energy efficiency. One drawback of power electronics driven systems is the generation of non-fundamental air-gap torque ripple components due to electrical harmonics. The air-gap torque ripple can interact with the mechanical system at natural torsional frequencies of the drive train. Uncontrolled excited torsional vibration can silently lead to coupling failure due to fatigue. The coincidence of electrical drive harmonics and natural torsional frequencies of the mechanical system is sometimes unavoidable, due to the large variable speed range of the compressor as for process requirements. For those types of applications, a damping system utilizing available power electronics has been developed that can be applied to new units but also as a retrofit solution in existing variable speed trains. Electronic torsional vibration elimination (eTVe) is based on an angular vibration measurement in the mechanical system and an interface to the existing inverter control of the electrical drive. An important milestone of the eTVe development was achieved in 2010, in site testing this new solution to Liquid Natural Gas (LNG) production trains and demonstrating that it can completely eliminate torsional vibrations. With eTVe a residual torsional vibration level was achieved that was lower than the vibration level measured while the LNG train was only gas turbine driven. This torsional performance was achieved with a standard load commutated inverter drive (LCI). LCIs are one of the most widespread electrical drive technology for gas compression trains because of excellent reliability records, and it is the only one referenced solution for electric power larger than 45 MW.

scholarly journals Supporting Non-traditional Students in Online Environments

2020 ◽  
Vol 2 ◽  
pp. 6
Author(s):  
Madison M Afzal
Keyword(s):  
Online Courses ◽  
Learning Experience ◽  
Research Synthesis ◽  
Traditional Classroom ◽  
Online Course ◽  
Teacher Interaction ◽  
Electronic Learning ◽  
Course Retention ◽  
Non Traditional Students ◽  
Major Factors

In ever-evolving electronic learning environments, course retention of students in online courses is significantly lower than those studying in traditional classroom contexts. Through a research synthesis, three major factors seem to impact online course retention: levels of student engagement, the student's ability to self-regulate, and quality teacher interaction and feedback. If any of these factors are missing from the student's online learning experience, it will be more difficult to keep the student engaged in the material, stay motivated, and feel connected to the teacher and other classmates.

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