3-0 SRIM is having slip at full load S₁ = 0.05 Rotar resistance is 0.2 0, external resistance of 0.40 is added to its rotor circuit through slip rings, Find the new value of Slip. (load torque is constant)
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- Name three factors that determine the torque produced by an induction motor.A three-phase squirrel cage induction machine with rated frequency of f = 50 Hz has a rated slip sn = 0.06. What is the rated speed of the machine in rpm (revolution per minute) if the number of pole-pairs is p = 2? Answer:Here it is the equivalent circuit of and induction motor and it is per phase circuit my question is name for me the variable for example R1 is the winding resistance and so an the all variable and please show me a pic of the real machine with the variable for example for R1 happens because of the winding i need to see the winding in the real machine, please help me to understand well
- 3.An induction motor has a rotor resistance and reactance at standstill of 0.1 ohm and 3.5 ohm respectively. At standstill the voltage induced to the rotor is 60volts per phase. If the slip is 5%, determine the rotor current1.Two identical shunt generators running in parallel, each with armature resistance of 0.02 ohms and field resistance of 50 ohms. The combined load current is 5000A. The field are so excited that the generated voltages of one machine is 610V and the other is 600V. The terminal voltage of this parallel combination will be. www Ish1 Rh1 a.350-360 V b.450-460 V c. 550-560V Rat www az G₂ Raz 5000 A Ish2The machine shown in Figure 2 has three concentrated stator coils, each of eight turns. The coils are arranged symmetrically around the stator at120° intervals. The poles of the rotor are so shaped that the air-gap flux density due to the rotor mmf is nearly sinusoidally distributed. The total rotor flux is 0.040 Wb. The rotor is driven at 3000 r/min. (a) Determine the frequency of the voltages generated in the coils. (b) If the stator terminals a', b' and c' are connected to form a Neutral point o, find the rms voltage between any two of the terminals a, b,and c. Figure 2 SO 6.
- A compound generator has a lap-wound armature with 200 slots and four turns per coil. It is rotating with a speed of 80 rpm and flux per pole is 100mWb. The armature resistance is 12 and shunt field resistance is 2002. The series field resistance is 22. Determine: (i) Terminal voltage (ii) If a load is connected to the terminals which starts pulling a load current such that the flux that is produced by the series field is added into the shunt field to keep the new induced voltage to be the same as the induced voltage at no load, what will be the new terminal voltage if the shunt field current is dropped to 90% of the shunt field current at no load? (iii) Power dissipated in the load Draw equivalent circuits#T Consider figure and assume that the rotational torque is 200 N-m and the radius of the rotor is 0.25 m. Determine the applied force in N. a) If the angle 0 is 15° b) If the angle 0 is 45° AIN sin (180 - 0)=rand Action lineIn a dc machine when the number of parallels paths is (a) and the number of poles is (p), thus for lap winding O a p O a = 2 ENG
- In a DC motor, why forces are generated for parts of the loop and not for other parts of the loop. The Force equation with sin theta ( max force when theta is 90 degrees or perpendicular to magnetic field lines.)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 0A 2 pole wave wound dc generator has 44 slots, each slot having 20 conductors. The flux/pole is 0.018 weber. At what speed the armature be rotated to get an induced emf of 220 V. What will be the induced emf developed if the armature winding is lap connected and runs at the same speed. Speed Generated Emf when lap connected