A three-phase induction motor with a double cage
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Q: 80 Ω 40 N 50 V {50 0 | 750 mA §2000 Suppose we kill the 50V source, leaving only the 750 mA source. ...
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- The concepts a 3 phase squirrel-cage induction motors (SCIM). 3 phase motors are widely used in the industry. they require little maintenance, having no brush gear or centrifugal switch, are robust and relatively inexpensive.A three-phase induction motor has: n-1500 rpm, nm-1440 rpm, the input power of the motor is Pin = 37.5 kW, if the no-load losses (i.e. stator core losses Pscl & core losses Pa) are equal 1.5 kW. Then the rotor core losses is: 1.44 [kW] 1.50 [kW] 3.56 [kW] 4.56 [kW]Frequency of emf in the stator of a 8 pole induction motor is 50Hz and the rotor emf frequency is 1Hz. The motor speed is ................ Answer
- A value of magnetizing current in a 3-phase induction motor * gives power factor smaller .. larger smaller. .poor large . better O large...poor OWhat are the various losses in an induction motor? On what factors do they depend? IV. V. List the different types of stray load losses in an induction motor.6. Home Works: a) The figure below shows the per-phase equivalent circuit of a two- pole three-phase induction motor operating at 50 Hz. The voltage (E1) across the magnetizing inductance is 210 V, and the slip (s) is 0.05. What is the developed torque produced by the motor ? 0.04 0 jo.22 Q j0.22 0 j6.28 NE E1 0.05 0
- The resistance and reactance of the main winding of a 50 Hz single phase induction motor are √3 Q and 1 Q, respectively. The motor is capacitor start motor. The power factor angle of the auxiliary winding to achieve maximum starting torque is (in degrees)8. A 3-phase induction motor is running at 2% slip. If the input to rotor is 1000 W, then mechanical power developed by the motor is ............ (i) 20 W (iii) 500 W (ii) 980 W (iv) 200 WDerive the condition for maximum torque of an induction motor and hence obtain the expression of maximum torque