Procurement Section
Electrical Engineering Department Laboratory Equipment
Tender # 2010/161
1
Electrical Machine
Drive Trainer1
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Transformer
Trainer
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DC Motor Drive
Trainer
The Trainer includes a base (workstation) to hold machines,
and a prime-mover (a driver motor and its power supply and
controller for driving the generators), a Synchronous
generator, a synchronous motor, an AC induction motor
(wound and squirrel cage rotors) single and three phase
machines, shaded pole motor, reluctance motor, universal
motor, Permanent Magnet brushless DC motor, DC motor/
generator with brushes, other types of motors will be
considered. The setup also includes couplings, connectors, DC
power supplies and single and 3-Phase power supplies to drive
the motors. Load torque, three phase Resistive, Inductive, and
Capacitive loads are included. AC and DC current and voltage
meters, speed meters, necessary single and three phase
wattmeters, power factor meter, torque meters and manuals are
also included. Computer interfacing could be is an advantage.
The setup should have all safety and protection features (shaft
guards, overload, over-current, under-voltage protections…).
Note that all connecting cables/wires (with safety heads/plugs)
and connectors should be included.
The trainer enables studying single phase Transformer by
conducting short and open circuit tests, finding transformer
parameters, load characteristics, turns ratio current and
voltage relationships… The trainer includes the necessary
power supply, R L and C loads, measuring meters, and
connecting wires with safety heads/features and safety plugs.
The trainer has also all protection features. Manuals should be
provided.
The Trainer enables studying a DC motor Drive. It has all
safety and protection features and manuals. The setup allows
the following:
 Experimenting open and closed loop control of a DC motor.
 Operation of a DC machine in various operating modes
 Operation in constant power and constant torque regions
 Experimental investigation of various methods for
Quantity
Description
Item No.
Item
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2
2
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Procurement Section
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Power Electronic
Trainer
5
Electric Power
Trainer
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Three Phase Wattmeters
Connecting cables
with safety heads
for the machines
and power
electronic setups
Safety plugs
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8
controlling speed and direction of rotation
 Introduction to various types of speed regulation and
reversal: field weakening, modification of armature and field
resistors
 Introduction to different methods of braking DC machines,
 Measurement of current and voltage when braking DC
machines
 Clarification of the importance of temperature monitoring
for electrical machines
 Temperature measurement in the exciter winding when a
machine is running.
The Trainer enables conducting experiments on most of the
following topics: Rectifiers single and three phase, Controlled
rectifiers single and three phase, Power Factor Correction via
converters, DC-DC converters (Buck, Boost, Buck-Boost
converters, Isolated switch mode power supplies…) , DC- AC
inverters , AC Voltage controllers. The board has all safety
and protection features and manuals. Note that all connecting
wires and cables are with safety heads, and connectors should
be included. The trainer includes the necessary power
supplies, and R L or C loads, measuring meters,…
Electric Power Trainer for generation, distribution and
consumption of Electric power. It should enable conducting
experiments (or emulating) on High voltage transmission line,
high-medium voltage principal and distribution substation.
Simulation of Electric users: big industrial sites, small industry
and handicraft, commercial and residential buildings.
Demonstrating the power factor effect on system performance.
Displaying the electric energy stream of the transmission
network and the several energy production stations. All power
supplies, measuring equipments and connecting wires should
be included. Also the trainer and the connecting wires are
equipped with all safety and protection features. Manuals
should be provided.
Three phase power (2kW), and 500Vrms with voltage, current,
power and power factor display…
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1
4
Various lengths of cross sectional area of 2.5mm2, and of
various colors,
200
Of various colors, to be used with safety wires (cables), and to
replace old plugs
800
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Procurement Section
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Electrical Machine Drive Trainer Specifications
i.
The setups and kits should have all the necessary safety and protection features such as
safety covers for rotational parts, short circuit protection, overload current protection, over
voltage protection, and under-voltage protection etc.
ii.
The motors/generator’s rated power is less than 0.4kW
iii.
The equipments should have all the necessary manuals and accessories.
iv.
For DC Motor/Generator Module
The Module enables conducting experiments on various types of DC motors and Generators
in order to clarify: principles of operation, torque-speed characteristics, armature voltage/
Shaft speed relationship, armature resistance effect on torque-speed characteristic, effect of
field current. Armature reaction effect and the effect of inter-poles and compensating
windings. Output voltage and current characteristics. Effect of field current on generated
output voltage. Comparison of various types of DC motors and generators.
v.
For Three Phase Induction Motor/Generator Module
The Module enables conducting experiments on three-phase induction motor and Generators
in order to clarify: principles of operation, identification of winding and poles effect, reversal
of speed, torque-speed characteristics. Power factor, output power, efficiency, and effect of
Star and Delta connections on torque/speed curves and on input current. Demonstration of
Starting methods of induction motors. Effect of source voltage and rotor resistance (in
wound rotor) at torque-speed and starting torques. Output voltage and current characteristics,
torque/speed of the generator.
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Procurement Section
vi.
For Single phase Motors (Universal and Induction) Module
The Module enables conducting experiments on single-phase induction motor in order to
clarify: principles of operation. methods of starting, and comparison of various types of
single phase induction motors; split phase, capacitor-start, capacitor- run, capacitor start and
capacitor-run and shaded pole motors, reversal of direction of rotation, torque-speed
characteristics, input power factor, supply voltage effect on torque-speed curves, output
power, efficiency, etc.
vii.
For Synchronous Motor/Generator Module
The Module enables conducting experiments on single and three-phase synchronous motor
and generators in order to clarify: principles of operation, identification of winding and poles
effect, torque-speed characteristics. Power factor, output power, efficiency, and effect of
field currents on motor/ generator characteristics, V-curves and power factor. Output voltage
and current characteristics, open circuit test of generators, torque/speed of the generator.
Synchronization of the generator with a three-phase supply.
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