Variable Speed Electrical Drives
Name: Variable Speed Electrical Drives
Code: EME07196M
6 ECTS
Duration: 15 weeks/156 hours
Scientific Area:
Electrotechnical Engineering
Teaching languages: Portuguese
Languages of tutoring support: Portuguese
Sustainable Development Goals
Learning Goals
It is intended that students acquire useful knowledge to understand, analyze, and specify variable speed drive systems, involving current solutions in the industrial field. It is also intended that students gain access to tools (basic knowledge and bibliographic guidelines) that will enable the eventual continuation and deepening of their studies.
Contents
1. Introduction
Context and objectives
2. Constituent Elements of an Electric Drive
2.1 - Mechanical Load
2.2 - Electric Machine
2.3 - Power Electronics and Electrical Energy Source
2.4 - Command and Control
3. Drives with Direct Current Machines
3.1 - Speed regulation ? introduction
3.2 - Open-loop speed regulation
3.3 - Closed-loop speed control (independently excited machine)
4. Drives with Three-Phase Asynchronous Machines
4.1 - Speed regulation ? introduction
4.2 - Control by "voltage amplitude variation" with fixed frequency
4.3 - Control by "voltage frequency variation" with fixed amplitude
4.4 - ?V/f? Control
4.5 - Field-oriented control
4.6 - Direct torque control
4.7 - Hypo-synchronous cascade
5. Drives with Synchronous Machines
5.1 - Speed regulation ? introduction
5.2 - Speed regulation ? permanent magnet synchronous motor
Context and objectives
2. Constituent Elements of an Electric Drive
2.1 - Mechanical Load
2.2 - Electric Machine
2.3 - Power Electronics and Electrical Energy Source
2.4 - Command and Control
3. Drives with Direct Current Machines
3.1 - Speed regulation ? introduction
3.2 - Open-loop speed regulation
3.3 - Closed-loop speed control (independently excited machine)
4. Drives with Three-Phase Asynchronous Machines
4.1 - Speed regulation ? introduction
4.2 - Control by "voltage amplitude variation" with fixed frequency
4.3 - Control by "voltage frequency variation" with fixed amplitude
4.4 - ?V/f? Control
4.5 - Field-oriented control
4.6 - Direct torque control
4.7 - Hypo-synchronous cascade
5. Drives with Synchronous Machines
5.1 - Speed regulation ? introduction
5.2 - Speed regulation ? permanent magnet synchronous motor
Teaching Methods
The teaching is based on theoretical and theoretical-practical classes, with an emphasis on solving problems related to drives for various types of electric machines, particularly from the perspective of drive dynamics.
Office hours are available twice a week, in two-hour sessions, at the instructor's office. Email or Zoom can be used for addressing basic questions or for scheduling a time which is convenient for the student.
Office hours are available twice a week, in two-hour sessions, at the instructor's office. Email or Zoom can be used for addressing basic questions or for scheduling a time which is convenient for the student.
Assessment
The assessment components are graded using the [0-20] scale. The following are the assessment elements:
- [T1] Test 1 - Minimum grade of 8.5 (30%)
- [T2] Test 2 - Minimum grade of 8.5 (30%)
- [Ex] Final Exam (60%)
- [P] Project (40%)
The student can choose one of two possible assessment systems, where the Final Grade [NF] is calculated as follows:
i) CONTINUOUS ASSESSMENT:
NF = {(F1 + F2)/2} x 0.6 + P x 0.4
- Pass if NF ? 9.5
- Fail if NF < 9.5
ii) FINAL ASSESSMENT:
NF = Ex x 0.6 + P x 0.4
- Pass if NF ? 9.5
- Fail if NF < 9.5
- [T1] Test 1 - Minimum grade of 8.5 (30%)
- [T2] Test 2 - Minimum grade of 8.5 (30%)
- [Ex] Final Exam (60%)
- [P] Project (40%)
The student can choose one of two possible assessment systems, where the Final Grade [NF] is calculated as follows:
i) CONTINUOUS ASSESSMENT:
NF = {(F1 + F2)/2} x 0.6 + P x 0.4
- Pass if NF ? 9.5
- Fail if NF < 9.5
ii) FINAL ASSESSMENT:
NF = Ex x 0.6 + P x 0.4
- Pass if NF ? 9.5
- Fail if NF < 9.5
Accreditations and Certifications
