3 Phase Synchronous Machine Description and Specifications for Lab Tenders
3 Phase Synchronous Machine.
Synchronous motor belongs to the family of 3Phase Induction
motors, with the difference that the rotor is not same as Induction
motors instead has windings with slipring & slipring holder on the
rotor. These motors have damper winding to make it start like Induction
motors. These motors have 2 Types of Voltage Excitation, 3Phase for
starting the motor & additional 110V DC across the rotor to lock the
speed of the motor- Once it is excited with DC Voltage the rpm of the
motor gets locked, in the sense that if the motor is running on No load
or Full load the rpm remains the same. The application of such motors is
those machines which run only on fixed speed without any rpm change,
sugar mills & textile color mixing. This model is the
industrial/educational model suitable for demonstrating to students the
complete know of the basics, components, starting methods, DC speed
locking, speed-torque behavior, wear & tear & maintenance of
these motors packaged in small rating. Students can make connections of
their own with the help of the terminations provided for study of
features viz starting methods, speed control, speed-torque, speed
locking, effect of rotor excitation, effect of voltage imbalance
operation, blocked rotor test.
Technical Specs :
Power ratings available : 350W / 750W / 1KW /2 KW / 3KW/ 5KW
Voltage Input: 440V AC 50hz & Additionally 110V DC for Rotor
RPM: 1440 / 2880 RPM
Single / Double shaft extension,
List of Experiments:
Starting by DOL Starter
Starting by reduced voltage starter.
Effect of High voltage induction at time of starting
DC Speed locking
Speed Control by VVVF method
Load test & No load test of machine
Speed-Torque Analysis
Voltage-Speed Analysis
Speed reversal
Efficiency Analysis
Blocked rotor test
Motor Operation
Generator Operation
Cold Resistance & Hot Resistance
Motor Operation parameters
Basic Overhauling Know how