There are two designs for the rotor in an induction motor. An induction or asynchronous motor is an ac electric motor in which the electric current in the rotor needed to produce torque is induced by electromagnetic induction from the magnetic field of the stator winding. What makes the wound rotor motor a unique induction machine is its rotor. Their sole purpose is to allow resistance to be placed in series with the. Instead of a series of rotor bars, a set of insulated rotor coils is used to accept external impedances.
The reactance x2 in an induction motor equivalent circuit represents the referred form of the rotors leakage reactance. Wound rotor induction motors ac motors electronics. Fundamental wave model of lineoperated induction machine. For those watercooling motors or using bearings with watercooling coils, please make sure the water already dried off to prevent tube corrosion or danger of frost. Diagnostics of rotor and stator problems in industrial induction motors by fang duan b. Design of a bearingless outer rotor induction motor mdpi. If connected to rotor winding the starting torque of motor is equal to the rated torque. Realtime rotor and stator resistances estimation of an induction. Induction motors, parameter identification, parametrization, torque control, nonlinear systems. General purpose slipring induction motors product catalogue. A bearingless induction bi motor with an outer rotor for flywheel energy storage systems is proposed due to the perceived. The motor is mounted in a test rig that allows one to control the torque applied to the motor shaft and to measure both rpm and torque. Telecommunication engineering, southwest jiaotong university, china, 2005 thesis submitted for the degree of masters of engineering science in school of electrical and electronic engineering the university of adelaide, australia august 2010. Their sole purpose is to allow resistance to be placed in series with the rotor windings while starting figure below.
The basic idea of an electric motor is to generate two magnetic fields. Wound rotor induction motor the engineering projects. The rotor is a moving component of an electromagnetic system in the electric motor, electric. The 3phase set of currents, each of equal magnitude and with a phase.
Some of the applications of this motor include cranes, mills, hoists and conveyors. The rotor windings are similar to those found on a dc armature, with the coils connected together to a set of rings that make contact with. Cage induction machines institut fur elektrische energiewandlung. A wound rotor induction motor has a stator like a squirrel cage induction motor, but a rotor with insulated windings brought out via slip rings and brushes. Squirrelcage rotor almost 90 per cent of induction motors are squirrelcage type. Pdf version a wound rotor induction motor has a stator like a squirrel cage induction motor, but a rotor with insulated windings brought out via slip rings and brushes. Record all nameplate information for the induction motor.