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TOPICS
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OBJECTIVES - LEARNER WILL BE ABLE
TO:
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D.C. GENERATORS:
- Operating principles.
- Separately excited, self-excited,
shunt and compound generators.
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- Sketch and describe the various parts
of a dynamo.
- Describe the difference between a
separately excited and self-excited generator.
- Describe armature reaction and their
effects on D.C. dynamos, and the design and construction
methods used to minimize the effect of armature reaction.
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D.C. SHUNT AND SERIES MOTOR:
- Armature reaction, Counter
EMF, speed, torque, efficiency and powers.
- Rotation
- Speed control and speed regulation
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- Describe the connection diagrams
for shunt, series and compound motors.
- Calculate the counter EMF, circuit
voltage and current, powers, efficiencies, speed and torque.
- Describe and compare graphically
the speed, torque, armature current and efficiencies characteristics
for shunt and series motors.
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D.C. COMPOUND MOTORS:
- CEMF, speed, torque, efficiency
& powers
- Rotation, speed regulation
- Characteristics of a cumulative
compound and differential compound motor.
- Starting D.C. motors: 3 point
and 4 point starters.
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- Describe the torque, speed, rotation,
and speed regulation and control characteristics of cumulative
compound motor.
- Describe the characteristics of a
differential compound motor.
- Understand primary functions of the
3-point and 4-point starters.
- Calculate copper and stray power
losses and maximum efficiencies.
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D.C. MOTOR SPEED CONTROLS:
- By field rheostat
- By armature speed controller
- Dynamic braking and plugging
- Relay ladder-logic diagrams
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- Explain the speed control by field
current resistance control and armature voltage control
for a DC motor.
- Describe the method of stop the the
DC motor by dynamic braking and plugging.
- List the steps in the operation of
a control circuit using start and stop push buttons and
contractors.
- Interpret simple automatic control
diagrams.
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MOTOR CONTROL CIRCUITS:
- Forward/reverse circuits
- Time delay circuits with
on-delay and off-delay timers
- Programmable logic controller
(PLC) Introduction
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- Understand and connect forward/reverse
control circuits.
- Read and interpret ladder diagrams
with timers.
- Design and connect time delay logic
circuits.
- Select on-delay and off-delay timers.
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P.L.C. PROGRAMMING TECHNIQUES:
- Start and stop program logic's.
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- Enter a program to program logic
controls.
- Understand and apply relay, push
buttons, sensors, and contactors to form various control
circuits.
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PLC TIMER INSTRUCTION AND
APPLICATIONS IN INDUSTRIAL CONTROLS:
- Timed sequence, and time
press circuits
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- Understand and apply PLC timer instructions
to form various control circuits.
- Convert relay ladder diagrams to
PLC circuit diagrams with timers.
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PLC COUNTERS:
- Up/down concept and instructions
in industrial applications
- PLC sequencer.
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- Understand and apply counters in
control circuits.
- Convert relay ladder diagrams to
PLC circuit diagrams with counters.
- Understand PLC squencer.
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INDUSTRIAL CONTROL AND
OPERATION OF A CONVEYOR SYSTEM:
- Sensors, cycle start &
stop, anti-tie-down protection, electrical and mechanical
interlocks protection, sequential time chart and function
chart.
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- Use of various sensors.
- Use of various industrial protection
devices.
- Develop an understanding of programming
conveyor systems.
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- PLC industrial outlook and
other PLC programming techniques
- PLC robotic arm control
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- Compare some other PLC products in
the industry.
- Design a PLC program for a robotic
arm control.
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THREE PHASE POWER SYSTEMS:
- Star (Wye) and Delta systems
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- Measure and calculate power in 3-phase
systems.
- Compute the voltage; and current
in the Star (Wye) and Delta connection circuits.
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POLYPHASE MOTORS:
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- Explain how a rotating magnetic field
is develop, calculate speed, slip, powers and standstill
in induction motors.
- Describe synchronous motor principle.
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SINGLE PHASE MOTOR:
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- Describe the operation of various
single phase motors.
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