Three-Phase Induction Motors . A 3-phase wound-rotor induction motor is very similar in construction ... Breakdown Torque & Speed The developed torque is given directly proportional to the rotor reactance. Induction motor. The above value becomes somewhat larger with small single-phase motors. inversely proportional to the rotor leakage reactance. The rotor torque at any slip s can be expressed in terms of the maximum (or breakdown) torque Tb by the following equation. In this diagram, T represents the nominal full-load I am designing a three phase induction motor ... down torque to The torque developed by a conventional 3-phase motor depends on its speed but the relation between the two cannot be represented by a simple equation. 34.22). Torque/Speed Curve. It is made up of a number of stampings, which are slotted to receive the windings [Fig.34.2 (a)]. The stator carries a 3-phase winding [Fig.34.2 (b)] and is fed from a 3-phase supply. ... of low-impedance motors. Calculate the torque exerted by an 8-pole, 50-Hz, 3-phase induction motor operating with a 4 per cent slip which develops a maximum torque of 150 kg-m at a speed of 660 r.p.m. in three phase induction motors, squirrel cage and wound rotor. Where, T represents the torque generated by induction motor, represents flux responsible of producing induced emf, I2 represents rotor current, and cos2 represents the power factor of rotor circuit. Torque Slip Characteristics of Induction Motor Torque Slip Characteristics of Three Phase Induction Motor The torque slip curve for an induction motor. The stator of an induction motor is, in principle, the same as that of a synchronous motor or generator. An induction motor, 3 phase induction motor or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. The torque developed by an asynchronous induction motor varies when the motor accelerates from zero to maximum operating speed. Torque Slip Characteristics of Induction Motor Torque Slip Characteristics of Three Phase Induction Motor The torque slip curve for an induction motor. In case of an 3 phase induction motor, is torque directly or inversely proportional to slip? Why is there a pull-up torque during the starting of an induction asynchronous motor. Example 34.12. The speed torque curve of an induction motor is a plot of speed on the x-axis and torque on the y-axis. Starting torque is nothing but the torque produced by an induction motor as start. At start, N= 0 and slip s = 1. Three-phase induction motor - Squirrel cage rotor ... Breakdown torque : 370 % ... Three-phase induction motor 10/6/2011 get here the study notes on 3-phase induction machines-1 for the aspirants of GATE/ESE ... Three Phase Induction Motor. Fig 1 Cut Section of Three phase Induction Motor The most common motor type is the squirrel-cage motor, which has rotor windings consisting of copper or cast-aluminium bars solidly connected to conducting end rings on each end, forming a structure which resembles a squirrel cage. Note: A few, unusual three-phase a.c. induction motors do not have any breakdown torque. Fig 1 Cut Section of Three phase Induction Motor The most common motor type is the squirrel-cage motor, which has rotor windings consisting of copper or cast-aluminium bars solidly connected to conducting end rings on each end, forming a structure which resembles a squirrel cage.