What application best suits a series-connected DC motor?
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- Design and develop equivalent circuit model of a single phase Induction motor with th consideration of core losses present with the parameter consideration of stator resistance R1 and reactance X1 and two rotor parameters which includes r2,x2 and magnetising reactance xm. (Illustration is required) Draw by hand pleaseIV. What are the various losses in an induction motor? On what actors do they depend?When drawing the steady state electrical model (for an AC induction motor), is the stator armaturre inductance considered? Why/Why not?
- The air-gap flux density of a two-pole induction motor is given by B=Bm cos(ωt−θ)where Bm is the peak flux density, θ is the angular displacement around the air gap, and we have assumed clockwise rotation. Give the corresponding expression for the flux density of a four-pole induction motor; of a six-pole induction motor.a- Draw the equivalent circuit of three phase induction motor referringall parameters primary to secondary?b- Find Power in induction motor and Power losses in Inductionmachines?a. A three-phase, 220-V, 60-Hz induction motor runsat 1,140 r/min. Determine the number of poles (forminimum slip), the slip, and the frequency of therotor currents.b. To reduce the starting current, a three-phasesquirrel cage induction motor is started byreducing the line voltage to Vs/2. By what factorare the starting torque and the starting currentreduced?
- A three-phase 60 Hz induction motor connected to a three-phase bus at rated voltage isoperating at a low slip condition (i.e s < 20%) resulting in a steady state speed of 1090 rpm.(a) How many poles does the motor have?(b) What is the percentage slip at the operating speed?(c) What is the corresponding frequency, (fr) of the currents and voltages induced in therotor winding?A 3-phase induction motor , the impedance of star connected stator winding is 0.2+j 3 ohm per phase. the no load induced EMF between slip ring is 220 V. Find the rotor current and power factor at rated speed of ? 1455 r.p.mType your question here Prove that the power developed by a three-phase induction motor is maximum when the equivalent load resistance RL is equal to the magnitude of the standstill impedance of the motor Zol. Then find the maximum power and slip at which occurs.
- A three-phase induction motor, operating at rated voltage and frequency, has a startingtorque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-loadtorque. Ignoring the effects of the stator resistance and rotational losses and assumingconstant rotor resistance, determine the slip rated load, and the rotor current at starting (as a percentage of the rotor current at rated load). The slip at maximum torque is 0.343 if that helps.A three-phase induction motor, operating at rated voltage and frequency, has a startingtorque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-loadtorque. Ignoring the effects of the stator resistance and rotational losses and assumingconstant rotor resistance, determine the slip at the maximum torque;What are the principle characteristics of DC series motor and DC compound motor, and what are its uses? Explain the Difference between Single Phase & Three Phase transformers with a Comparison Chart. What conditions are necessary for paralleling two synchronous generators?