MODULE DETAILS

Module 7: Electrical Machines

Nominal duration: 4 weeks (48 hours total time commitment)

This time commitment includes the preparation reading, attendance at each webinar (1 hour plus 15-30 minutes for discussion), and the time necessary to complete the assignments and further study.

MODULE PURPOSE

To provide participants with a detailed analysis of DC and AC machines principles, construction, speed control, reversing and braking, losses, efficiency calculations, measurements, machine testing, maintenance, troubleshooting, motor circuit protection, motor technology development.

PRE-REQUISITE MODULE(S)

Module 6: Transformers, Circuit Breakers and Switchgear

ASSESSMENT STRATEGY

To evaluate the achievement of the learning outcomes; written assignments, group projects and practical exercises are set.

SUMMARY OF LEARNING OUTCOMES

 

 

1.   Examine basic principles of operation of electrical machines.

2.   Examine ac and dc machines and their applications

3.   Examine motor control, protection, testing and maintenance

4.   Conduct motor failure analysis

5.   Examine new electrical machine  technologies and developments

 

 


Learning Outcome 1

Examine basic principles of operation of electrical machines.

Assessment Criteria

1.1

Discuss the principles of operation of electrical machines

1.2

Perform basic torque calculations

1.3

Describe the relationship between torque and speed in electrical machines

1.4

Compare and contrast the basic dc and ac machines in terms of: (a) applications and (b) characteristics



Learning Outcome 2

Examine ac and dc machines and their applications

Assessment Criteria

2.1

List the different types of ac and dc motors and their applications

2.2

List the faults that may occur in electrical machine sand describe the tests necessary for fault finding

2.3

Identify the components of a 3-phase induction machine

2.4

Describe the limitations of single-phase ac motors


Learning Outcome 3

Examine motor control, protection, testing and maintenance

Assessment Criteria

3.1

Compare motor control methods and discuss their implementation

3.2

Discuss the various protection methods available for motors in terms of (a) overload, (b) over current, (c) under-voltage, (d) under-frequency, (e) over fluxing, (f) stalling, and (g) earth faults

3.3

Outline performance testing of motors and maintenance requirements to prevent failure

 

 


Learning Outcome 4

Conduct motor failure analysis

Assessment Criteria

4.1

List the common causes of motor failure

4.2

Examine the effects of excessive loading on motors

4.3

Conduct motor and bearing failure analysis



Learning Outcome 5

Examine new electrical machine  technologies and developments

Assessment Criteria

5.1

Examine special types of electrical machines

5.2

List new technologies and developments in the field of electrical machines

Delivery mode

A combination of asynchronous and synchronous e-learning delivery comprising a judicious mix of interactive online web conferencing, simulation (virtual labs) software, remote online labs, online videos, PowerPoint slides, notes, reading and study materials (in PDF, HTML and Word format) accessed through the Moodle Learning Management System (LMS).

Software/Hardware Used

Software

  • VPLabs

  • Instruction update 11/09/2019 - v2.3

Hardware

  •  Remote Lab