A 6 pole, 50 Hz, 3-phase, wound rotor induction motor is taking 8000 watts from theline. If core loss is 210 watts, stator copper loss is 520 watts, rotor copper loss is 430watts, friction and windage losses are 90 watts, determine: (a) power transferredacross air gap; (b) mechanical power developed by rotor; (c) mechanical poweroutput; (d) motor efficiency; (e) slip?

Step 1: Given Data: Line power (input power): Pinput=8000W Core loss: Pcore=210W Stator copper…

Answered: A 6 pole, 50 Hz, 3-phase, wound rotor…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Shunt dc generator supplies 220 V at 90A .The resistance of Armature and shunt field winding are 0.04 and 110 ohm respectively.Assume the total brush drop is 2 V. Your answer the emf generated is. . O 215 V O 220 V 225 V O 230 V If An 4-pole lab wound dc generator has 120 slot at each 8 conductors per slot,flux is 0.03 Wb. the speed of dc machine is...
Q / What is the benefit, purpose and conclusions of making single-phase induction motors ..?
I.What is the effect of load on the efficiency of an induction motor? II. Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are related to each other? III. Derive an expression for the rotor copper loss in terms of slip and input to the rotor? IV. What are the various losses in an induction motor? On what factors do they depend? V. List the different types of stray load losses in an induction motor.
Q2) A 6 pole, wave wound DC shunt generator has a useful total flux of 420 mWb. The armature winding consists of 220 turns each of 0.004 Q resistance, when running at 900 RPM the armature current is 50 A. If the armature winding reconnected as lap calculate the terminal voltage in case of wave and lap given that the field circuit and the speed are kept same.
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Q1) Answer the following: - 1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb flux per pole then la = results in decreasing as shown in 2-Hence, beyond certain limit any further decrease in the consequently, the characteristic curve figure below. B Armature Reaction Drop Ohmic Voltage Drop D Internal Characteristic External Characteristic Load Current (I) 3-in figure below Armature flux lines is due to the Field poles are GNA, MNA Amaturs 4-If the DC shunt generator has an induced open circuit voltage of 127 v and the generator is delivers current of 342 A, the on load voltage is 120 v and field resistance 15 ohm then RaD 5- However, even when the field current is zero, some amount of emf is generated (Represented by fact that there exists some residual magnetism in the field poles. in the figure below) this initially induced emf is due to the N. N. N. Increase in speed (N) Field Current (1,) No-load voltage (E) Generated Voltage (Eg) o Terminal Voltage (V)>…
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Q1) Answer the following: - 1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb flux per pole then la = 2-Hence, beyond certain limit any further decrease in the consequently, the figure below. results in decreasing characteristic curve_ as shown in Armature Reaction Drop Ohmic D Voltage Drop Internal Characteristic External Characteristic Load Current (1) 3-in figure below Armature flux lines is due to the Field poles are GNA MNA Amatu 4-lf the DC shunt generator has an induced open circuit voltage of 127 v and the generator is delivers current of 342 A, the on load voltage is 120 v and field resistance 15 ohm then Ra= 5- However, even when the field current is zero, some amount of emf is generated (Represented by fact that there exists some residual magnetism in the field poles. in the figure below) this initially induced emf is due to the N. N, N. Increase in speed (N) Field Current (1,) 6- The connection arrangement to obtain shunt or series excited…
(a) With aid of suitable diagram, explain the losses and power-flow of an induction motor. (b) A three-phase, 60 Hz, six poles induction motor runs at a no-load speed of 1150 r/min and full-load speed is 1000 r/min. (i) Calculate the slip of the rotor at no-load and full-load conditions.
Please answer in short like it definitely.. Please
Q#4: Obtain an expression for the condition of maximum torque of 3-phase induction motor. Sketch the torque- slip curves for several values of rotor circuit resistance and indicate the condition for maximum torque to be obtained at starting. If the motor has a rotor resistance of 0.03 2 and a standstill reactance of 0.07 2, what must be the value of the total resistance of a starter for the rotor circuit for maximum torque to be exerted at starting?
An 8 pole DC shunt generator with 900 wave-connected armature conductors supplies 10ohm at 500 V when driven at 500 rpm. The armature resistance 0.4ohm and the field resistance is 250ohm . Determine: . . 2 1.1 The flux per pole 2.1.2 The armature current for maximum efficiency if the rotational losses are 10% of the ar- mature copper losses . 3.2 A series motor runs at 600 rpm while drawing 40-A from 600-V supply. The total re- sistance of the armature and the field is 0.5-ohm. Determine the value of the additional re- sistance required in series with armature to reduce the speed to 450 rpm if the load toque is: 3.2.1 Constant 3.2.2 Proportional to the square of the speed .

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