Known
for their precision in construction and rugged design our range of Slip
ring motors find extensive applications in several industries including,
engineering, chemical, textile and pharmaceutical industries.
Our
Slip ring motors are made out of the finest quality material and
are designed after extensive testing in our state-of-the-art R & D facility.
Capable of working under varied RPM, our range of Slip ring motors
are already being extensively used. The rotor, which is similar to squirrel cage
induction motor, consists of a cylindrical core made up of lamination. Slots in
this lamination core hold the coils for three single phase winding, which are
placed at 120 electrical degrees apart. The three single-phase rotor windings
are connection to slip rings which are mounted or to the rotor shaft.
Extension leads from carbon brushes are connected to an external rotor resistance
starter.
When
three-phase power is applied to the stator winding, a rotating magnetic field
is formed. This field travels around the inside of the stator core, as in the
case of a squirrel case induction motor.


The
rotating field travels at synchronous speed, cutting the wound rotor
winding and thereby induces voltages in these winding. When you start the motor
all the resistance of the rotor resistance starters inserted into the circuit.
The increase in resistance in the circuit increases the impedance. This enables
maximum interaction between the two fields and highly strong starting torque.
Once the motor is accelerated, the resistance is cut out of the rotor resistance
and the rotor slip rings are short-circuited. This results in the
motor operating at rated speed , similar to the case of a squirrel cage induction
motor.
Compact
design makes them very easy to handle, at the same time requiring virtually no
maintenance.