Past Events

Start: 06-Aug-2018
End: 08-Aug-2018

Motor Driven Systems











Course Summary

In industrial plants and facilities, electric motors and motor driven systems are a part of everyday life. Engineers with job functional responsibilities for energy and facility management need a good understanding of how motor driven systems work. By gaining a good basic understanding of these integrated systems, engineers will be able to appreciate their potential and limitations.

Program Outline

Topic 1: Concept of Power and Energy

a) Calculation of energy savings
b) Power factor correction
• Implementation at component or device level
• Implementation at system level
• Economic benefits
• Technical advantage/disadvantage comparison

Topic 2: Motors

a) Operation and characteristics of electric motors
• Conventional DC Motors - shunt, series and compound
• AC Induction Motors – cage and wound rotor types
• Conventional synchronous motor
• PM synchronous motor
• Brushless DC Motor (BLDC, self synchronous motor)
b) Motor efficiency
• Various losses in motors: copper , iron, core, stray, windage, hysteresis, eddy current losses
• Motor loading and efficiency
• High efficiency motors
c) Speed control methods
• Variable applied voltage
• Variable armature current
• Variable motor field
• Variable frequency
• Combination of the above
d) Selection and sizing of motors (including industry standards)

Topic 3: Drive Systems

a) Power Electronic Converter and Inverter Switching Devices
b) Main Components of VSD
c) Types of VSD
• Voltage Source Inverter

• Current source inverter,
d) Key features of VSD
• Rectification
• Inverting
• Harmonic filtering
• Power factor correction
• Voltage level regulation / adjustment
• Energy reversal
e) Selection, sizing and efficiency of VSD for variable torque load / constant torque load
f) Application of converters for AC/ DC motor speed/torque control
g) Application of converters for Permanent Magnet Synchronous (PMSM) speed/torque control

Topic 4: Driven Systems

a) Types of transmission (belts, gears, coupling, chain, etc)
b) Comparative features of transmission system
c) Selection, Sizing and Efficiency of transmission system
d) Typical Driven Systems- Pumps, Fans, Compressor, Hoist, Conveyor, etc
• Parallel and series pumping
• Losses in pumps, pump efficiency
• Fan losses and fan efficiency
e) Affinity Laws – use affinity law to determine the min % of reduction in speed for a given % of reduction in quantity of delivery,
f) Flow of regenerative energy
g) Energy saving opportunities by applying variable speed to motors driving centrifugal pumps and fans and application of affinity laws
h) Sizing of motors for variable torque load such as for centrifugal pumps, fans and compressors as well as for constant torque load
i) Energy saving opportunities for linear load
• Geared/gearless elevator systems and escalators
• Counterbalance
j) Case studies

Speak Profiles

Dr. Lal Jayamaha is the author of the book “Energy Efficient Building Systems” published by McGraw-Hill, USA and the founder of LJ Energy Pte Ltd which is one of the leading ESCOs in Singapore

Dr. Jahangeer K. Abdul Halim graduated with a Master of Science (M.Sc.) in Mechanical Engineering from National University of Singapore in 1998. He was awarded a Research Scholarship by the National University of Singapore (NUS) in 1999 to undertake a research project on solar energy and was awarded a Master of Engineering (M.Eng.) degree in 2002.


Extra Information

Date: 6 - 8 August 2018

Time: 9am - 6pm


Before Funding: $963.00; After Funding: $577.80

Fees are inclusive of GST

E2I funding is available to all Singaporean and PRs.
Interested participants are to register for full qualification of 4 cores & 2 electives to be eligible for funding
Optional Examination fees at $85.60

Contact Information

+65-63388578 /

Address Information

180 Kitchener Road City Square Mall Level 6 Sky Park, #06-10

Module Title Start Date End Date
Motor Driven Systems 06-Aug-2018 09:00:00 08-Aug-2018 18:00:00