Download Electrical_Machines_Lab_Upgrading_Proposal_Fall_2009

Procurement Section
Tender Electrical Engineering Electrical Laboratory Equipment
2009/140
Annex B
Item No.
Item
Description
Qty
1
Electrical
Machine
Drive Kit(*)
3
2
DC Motor
Drive setup
The kit includes a base to hold machines (workstation), a
Synchronous generator and a prime-mover, a
synchronous motor, an AC induction motor (wound and
squirrel cage rotors) single and three phases machines,
Permanent Magnet brushless DC motor, DC motor with
brushes, 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. AC and DC current and voltage
meters, speed meters, single and three phase watt-meters,
power factor meter, torque meters. Note that all
connecting cables are with safety plugs, and connectors
should be included. The setup should have all safety and
protection features.
The setup 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
controlling speed and direction of rotation
 Introduction to various types of speed regulation and
reversal: field weakening, modification by means 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.
1
1
3
Power
Electronic
Board
4
6
Three Phase
Watt-meters
DC Power
supply
24V/10A
Connecting
cables with
safety plugs
for the
machines and
power setups
7
TDS2002B
5
(*)
A.
The board has all safety and protection features and
manuals. The setup enables conducting experiments on
DC-DC converters; Buck, Boost, Buck-Boost converters,
Isolated switch mode power supplies, DC- AC motor
drives, Rectifiers single and three phase, Controlled
rectifiers single and three phase, Thyristor characteristics
and circuits, Power Factor Correction via converters.
1
Three phase power (2kW), and 500Vrms with voltage,
current, power and power factor display
2
Variable DC Power supply single/dual output, 24V/10A.
Simultaneous Display of Voltage and Current. The
power supply should have all protection features
1
Various lengths 1.5mm2
Digital Oscilloscope- 2 channels, Color LCD Display, 60
MHz Bandwidth, 1 GS/s Sample Rate, 2.5 k Points
Record Length, Advanced triggers including pulse width
and line-selectable video trigger, Context-Sensitive Help,
11 Automatic Measurements, FFT Standard on All
Models, Removable Data Storage via Front Panel USB
Port
200
6
Motor Drive Setups Specifications
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.
B.
The motors/generator’s rated power is less than 0.4kW
C.
The equipments should have all the necessary manuals and accessories.
D.
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.
2
E.
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. 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.
F.
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.
G.
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.
3