Remember that : F n! 3-Phase Induction Motors EE 340 . Speed and Direction of Rotation . loke06235. Where does the power go? The table below gives the commonly encountered problems in 3 phase squirrel cage induction motors, cause of problems and what remedy to apply to bring the motor back to production. in the rotor by electromagnetic induction. F n%1" F n%2 if n # 2 and F 0! Stator of Three Phase Induction Motor The stator of the three phase induction motor consists of three main parts :. A Three-phase Induction Motor Problem This application note describes how to set up, solve, and analyze the results of a two-pole, three-phase induction motor using RMxprt. ... –Conversion to mechanical power by motors (pumps, fans, HVAC, refrigeration – compressors, ... principle-of-three-phase-induction-motor/ Per-phase equivalent circuit • Motor Slip • R 1 and R 2 3. 3 phase induction motor multiple choice questions 3 phase induction motor multiple choice questions and answers 3 phase induction motor objective questions 3 phase induction motor objective questions answers 3 phase induction motor questions and answers 3 phase induction motor questions and answers pdf 3 phase induction motor short questions control speed of Wound Rotor Motors DC Series Motor … Network Analysis IES objective questions with solutions. i. Stator Frame It is the outer most part of the three phase induction motor. 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. The rpm sensor A three phase induction motor is a type of AC induction motors which operates on three phase supply as compared to the single phase induction motor where single phase supply is needed to operate it. Its main function is to support the stator core and the field winding. Record all nameplate information for the induction motor. With aid of the developed model, the steady and transient-state characteristics of current, speed and torque of three phase induction motor can be effectively examined and analyzed. The shaft output of a three-phase 60- Hz induction motor is 80 KW. Numerical Problems Induction Motors.pdf. Induction Problem Set Solutions These problems flow on from the larger theoretical work titled "Mathematical induction - a ... of formulas involving Fibonacci numbers and some of them provide good practice in induction. ... Ans: 2 Answer [4] A 4-pole three-phase induction motor has a synchronous speed of 25 rev/s. The other is the mechanical problems, such as the problems of the bearing, fan blade, motor frame, coupling, end bell, bearing cover, spindle and so on. The three phase supply current produces an electromagnetic field in the stator winding which leads to generate the torque in the rotor winding of three phase induction motor having magnetic field. An electrical motor is a device that has brought about one of the biggest advancements in the fields of engineering and technology ever since the invention Uploaded by. PRACTICE PROBLEMS ON INDUCTION MACHINE 1. In these problems F n is a Fibonacci number. Once the induction motor has any problem, there might be some abnormal phenomena, for instance, the rising temperature, over current, vibration and abnormal noise and so on. An induction motor (also known as an asynchronous motor) is a commonly used AC electric motor. The friction and windage losses are 920 W, the stator core loss is 4300 W and the stator copper loss is 2690 W. The rotor current and rotor resistance referred to stator are respectively 110 A and 0.15 Ω.If the slip is 3.8%, what is the percent efficiency? You should also make a DC measurement of stator winding line-to-line resistance using a DMM. The model created by RMxprt will then be used as an input for EMpulse as a basis for performing more detailed analysis and for increasing the accuracy of the performance pre-