ASSIGNMENT/COURSEWORK DATASHEET and SPECIFICATION Session 16-17 Thyristors and their application DATE of ISSUE: - 14th February 2017. 1. Module number ELE10106 2. Module title Electronic Drives 3. Module leader F. Vedreño Santos 4. Tutor with responsibility for this Assessment F. Vedreño Santos 5. Assessment Practical and written report. Please refer the attached Coursework Specification for further details. The practical work will be done in a group and the report is to be done on an individual basis. 6. Assessment Weighting a) Overall module assessment b) For this assessment a) 60% exam, 40% Continuous b) 40% 7. Size guide for assessment The main body of the report should be approximately 15 - 20 pages and/or 2500-3000 words in length. This is a guide only, not an absolute figure; the main aim is to meet the specification of the assignment. 8. Deadline of submission Your attention is drawn to the penalties for late submission as noted here. The report should be submitted by Tuesday 7th March 2017. This is the latest date for submission; reports can be submitted prior to this date. The University penalties for late submission will be applied. Reports submitted up to one week late will be capped at 40%; those more than 1 week late will be awarded a mark of 0%. 9. Arrangements for submission You submit your report in 2 formats. Firstly a stapled paper copy of the report must be submitted with the appropriate coursework cover sheet which must confirm that the assignment is your own and has not been submitted for another assessment. This should be submitted via the coursework drop-box at the School of Engineering and the Built Environment Office (C81B, Merchiston) by 4.00 pm on the assessment due date. You must also use the Turnitin facility to submit your report and to generate an Originality Report. Failure to do so will result in your mark being capped at 40%. The Turnitin drop-box is available in the Assessment Materials section in the ELE10106 Module Area in Moodle. Also contained in that section is a document which further explains what Turnitin is about. You will use this primarily to check that your report contains mostly original material. You are strongly advised to submit your report to Turnitin and receive the Originality Report at least 2 days before the final submission date. You will be able to re-submit once every 24 hours up to the due date if you wish. Further information on how to avoid Plagiarism and use of the Turnitin service are available at http://www2.napier.ac.uk/ed/plagiarism/ You are advised to keep your own copy of the assessment. 10. Assessment Regulations All assessments are subject to the University Academic Regulations. 11. Return of Work The marked coursework will be returned with feedback within 3 weeks from the submission date or the actual submission date, if later. Feedback will take the form of an email of a word-processed summary sheet which will indicate specific feedback points on the report. No correspondence about the mark awarded will be entered into until the individual feedback within the reports has been seen by the student. If you have difficulty understanding the feedback, please contact Dr Vedreño-Santos for an explanation. 12. Assessment criteria Please refer the Marking Schedule in the Coursework Specification below. You are required to follow the Harvard referencing conventions for acknowledging sources of material. Guidelines for the School of Engineering & the Built Environment are available via the Student Portal/Academic Skills/Referencing guidelines; http://www2.napier.ac.uk/ed/plagiarism/students.htm#guidelines ASSIGNMENT/COURSEWORK SPECIFICATION AIMS This assignment will assist the student to achieve the following learning outcome; • Classify component parts of electronic motor drives. BRIEF The initial requirement is the performance, in a small group, of the laboratory exercise number ELE10106 entitled "Thyristor Control of a Resistive Load". This will be performed on 14th February 2017. The remaining requirement is the submission of an original and individual Formal Report covering the performance of the laboratory exercise itself and including the following, (note the marks weightings given in the Marking Schedule below); a. Work as directed in the laboratory sheet, namely; i) Procedure 4 – Table of measurements. ii) Procedures 4 & 6 – Waveform plots 5.1 – 5.4 only. These must be of good quality. b. A description, in your own words, of the operation of the rectifier circuit used in the experiment (the single-phase, half controlled bridge rectifier). c. The theoretical equation for the dc voltage in this circuit is; (1 cos ) 2 α π = + rms dc xV V where Vrms is the value measured in part 7 of the laboratory exercise. Calculate (to 1 decimal place) the theoretical values Vdc for the same angles as those measured in the laboratory, including 0° and 180°. d. Using an Excel spreadsheet, or similar, plot both the measured and theoretical values of Vdc to a common base of delay angle, α, to show the relationship between Vdc and α. e. Perform an error analysis on these results. This should take the form of an evaluation of the "experimental error" associated with the laboratory work. This will allow a critical comparison to be made between the measured voltages and those obtained from the theoretical calculations. The purpose of this is to determine whether or not the measured values "agree" with the theoretical values. In the event that this is not the case then a discussion should be provided which explains why. This process should include the quantification of the dominant errors associated with the measurements and the indication of these as "error bars" on the plot in part d. More information on this requirement has been provided in a separate sheet. f. Provide a brief summary statement of the highest presently available voltage rating and current rating of individual Thyristor devices used for power applications. g. The experimental circuit used a resistive load. In motor drive applications, the load is usually inductive in nature, i.e. it is an R-L load. Research and describe in your own words how the single-phase, half controlled bridge rectifier circuit would operate with such a load. RESOURCES Apart from the laboratory sheet, the resources required are the appropriate lecture notes, relevant text-books, Journals and the internet. ASSESSMENT CRITERIA This assessment will be assessed on the report alone. The report should also be complete with all standard items including an abstract, introduction, conclusions and references. Refer journal papers in the Library for examples of the nature and content of these. The report should be in the appropriate tense and technical language for academic reports. Do not include background material which is not relevant to the topic of the experiment and the report. There is further guidance on report writing and an example of an Abstract in the assessment section within Moodle. MARKING SCHEDULE Item Weighting % Report structure and presentation, including abstract, introduction, conclusions and references. 30 Experimental procedure, measurements and work items a-g above. 70