0.82, 44.7A]Q6/ A 3-phase induction motor at standstill has a rotor voltage of 120 V between the slip rings onopen-circuit. The rotor winding is star-connected and has reactance of 12 per phase at standstilland a resistance of 0.22 per phase. Find the rotor current per phase and power factor at the start.Ans[13.6 A; 0.98 lag]Q7/A 3-phase induction mot

Answered: [62.3A, 0.82, 44.7A] age of 120 V…

[62.3A, 0.82, 44.7A] age of 120 V between the slip rings on s reactance of 10 per phase at standstill per phase and power factor at the start. Ans[13.6 A; 0.98 lag]

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter35: Harmonics 916

Section: Chapter Questions

Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...

See similar textbooks

Related questions

Q: Explain what happens when a dielectric leakage occurs.

A: A dielectric material is an insulator and ideally shouldn't allow any current through it But sometim...

Q: Solve the total capacitance

Q: Assignments: Obtain step and impulse response of the following systems with unity feedback connectio...

Q: Given the following vectors and points, transform each to spherical coordinate system. 9az at (7,11...

Q: Given the electric field E 3xa, -9ya, V/m, find the work done in moving a point charge Q = +2C from ...

A: Let total work done = W1 + W2 Where W1 is the work done in moving charge from (5,0,0) to (0,0,0) An...

Q: Q5) Explain about JK-flip flops and Show its characteristic table and equations.

Q: Practice Problem 4.13 42 ww-o RL 9 V 30s Figure 4.52 For Practice Prob. 4,13.

Q: Home Work 2 9 H ll 10 H ell 3 H 12 H 4Н 6 H a ll ll

Q: 3.Draw the logic diagram of a 5-bit parallel binary adder using a combinationof half adders and full...

A: 5-bit parallel binary adder using half adder (HA) and full adders (FA) :

Q: In a 3 phase, 4 wire system, there is a balanced 3 phase motor load taking 200 kW at a power factor ...

A: In this question balanced 3 phase motor lamp load is given...We have to find out current in each pha...

Q: How to connect these boolean expressions to CD4027 with 555 timer Jk flip flop 1 Ja = BCD Ka = D ...

A: According to the question, we need to design a circuit diagram by using CD4027 IC for the given bool...

Q: Find the value of the inductor's reactance given an inductance of 10 mH and frequency of 200 Hz. Ent...

Q: 2. (a) A 128-bit parallel binary adder is to be constructed using Full Adderblocks only. How many Fu...

A: 128-bit parallel binary adder:

Q: Find the coefficient of coupling

Q: Give the sign convention of Kischhoff’s Law using KCL and KVL. Draw diagram 3 resistors connected se...

Q: 2. (a) A 128-bit parallel binary adder is to be constructed using Full Adderblocks only. How many Fu...

Q: Three similar choke coils are connected in star to a 3 phase supply. If the line current are 15 A, t...

A: The solution is given below

Q: 2.63. Consider a discrete-time LTI system with impulse response n=0,1 h[n]=. otherwise Find the inpu...

Q: A 7485 four-bit magnitude comparator has P-1011 and Q= 1001. a- Determine the outputs.

Q: Given the point D(−4, 5, 3) and A = yax + (x + z)z ay, express the D and A in Spherical Coordinate S...

Q: Using Nodal Analysis solve V1 and V2 10 ww 20 12 V 24 V ww

Q: (d) With R= 12 M2, delermine the ms noise voltage If the bandwidth is changed to 800 kHz. (e) With R...

Q: a) [(A°U. - ΑΛ(Bυ C) b) (A°U B° U C)° = ANBNC c) A– [(BNA)U (Cn A)] = (BUC)°n A

A: Associative law: This is used to remove the bracket in the Boolean expression and regroup all the va...

Q: Sketch the dc load line. Show detailed graph/sketch and computation of values plotted.

A: Brief description: In the above given question they want to know the DC load line of the given commo...

Q: 240 k2 10 k2 V; (0.02 V, w = 300 x 103) -Vo +

A: We need to find out maximum frequency that can be used .

Q: a) List down (2) types of distortion occurs in practical amplifier operation and briefly explain eac...

A: Disclaimer: "Since you have asked multiple question, we will solve the first question for you. If yo...

Q: Given following phantom loads identified in a house, find the energy can be saw annually if the phan...

A: In this question per hour consumption of phantom loads in a house is given....We have to find out en...

Q: 5.33.2 For the circuit involving an ideal op amp shown in the image below, if R1 = 21 k2, R2 = 25 k2...

Q: Find R for maximum power transfer and the amount of maximum power that can be transferred to the loa...

Q: O/p rms voltage and current

Q: Consider a transmission line with Z-=50 N that is terminated by a load with ZL=200+j100 2. The wavel...

A: Given: Consider a transmission line with Zo=50 Ω that is terminated by a load with ZL=200+j100 Ω. Th...

Q: For the circuit in the figure below, the supply is 220 Vmsı 60 Hz. The load resistance is 16 N. Negl...

A: V=220 V rms Rload=16 Ω

Q: 1.11 Given that P - 2a, – a, - 2a. Q = 4a, + 3a, + 2a. R - -a, + a, + 2a. find: (a) |P + Q – R|, (b)...

A: “Since you have asked multiple question, we will solve the first question for you. If you want any s...

Q: Determine the electric field intensity midway Q3 Q1 = 10C B A 4R Q2 = 5C 5R

Q: Practice Question 7.1 A diesel plant burns at 12000 kcal/kg of fuel. The overall efficiency of the p...

A: In this question , diesel plant CV is given with efficiency .....We have to find out cost of produci...

Q: two-branch parallel circuit with one branch of R = 8 in series with an inductor of 0.015 H connected...

A: In this question parallel resonance is given....We have to find out period at which circuit will tak...

Q: single-phase transformer with a voltage regulation of 4% has a secondary terminal voltage of 115.4 v...

A: We need to find out voltage under no load condition for given regulation

Q: Find the force(F) on a 10µC charge at (1, 1,3)m if four like charges of 200µC are located on the x a...

Q: Given a lead acid battery bank with 10Ah and 12V, find the number of battery banks and draw the conn...

Q: a. Find an equivalent generalized transition graph with only two states. b. What is the language acc...

Q: What is the magnitude of the simple gain term for the following open loop transfer function: 24 G(s)...

Q: How can a bus architecture manage multiple computers transmitting at once?

A: The real world demands the analysis and design of complex systems. It is possible with the clear und...

Q: 4. R=_2 R, 1.6 kn R2 1.2 k R3 1 kn %3D

Q: 10.6 Determine V, in Fig. 10.55. + ell 20 Ω 20 2 0.2V j10 2 +, 60/0° V ell

A: Given circuit:

Q: 2. Using Nodal Analysis solve v1 and V2 ww 20 30 12 V 24 V Figure: 1.1 www www

A: “Since you have asked multiple question, we will solve the first question for you. If you want any s...

Q: If one of the sources in Figure 1.1 had been inserted with the opposite polarity, would there be a s...

Q: 2. A second order system is modelled by the transfer function G(s) = A s2 + 2s + 5 proportional cont...

Q: transistor amplifier circuit is operated with an emitter current of 2 mA. The collector current is 1...

Q: .0 V R2 R4 R3

Q: or the circuit in Fig. 7.18, find i(t) for t> 0. 1 =0 12 Q 82 O 15 A, 24Ω i() 5Ω ww 2 H Figure 7.18 ...

Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

100%

0.82, 44.7A]
Q6/ A 3-phase induction motor at standstill has a rotor voltage of 120 V between the slip rings on
open-circuit. The rotor winding is star-connected and has reactance of 12 per phase at standstill
and a resistance of 0.22 per phase. Find the rotor current per phase and power factor at the start.
Ans[13.6 A; 0.98 lag]
Q7/A 3-phase induction mot

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction motor? Explain your answer.
A three-phase induction motor is supplied with power from a 60-Hz source. At full load the motor speedis 1728 rpm, and at no load the speed is nearly 1800 rpm. At full-load conditions, determine thefollowing:a) Number of polesb) Slipc) Frequency of the rotor voltages
The stator resistance of a 1-phase induction motor is 2.5 ohm and its leakage reactance is 2.0 ohm. Onno-load, the motor takes 4 A at 96 V and at 0.25 lagging power factor. The no-load friction andwindage loss is negligible. Under the blocked-rotor condition, the input power is 130 W at 6 A and42 V. obtain the equivalent circuit parameters.
A single-phase, 120 V, 60 Hz, four-pole, split-phase induction motor has the following standstill impedances:Main winding: Zm =5+j6.25Auxiliary winding: Za =8+j6a) Determine the value of capacitance to be added in series with the auxiliary winding to obtainmaximum starting torque.b) Compare the starting torques and starting current with and without the added capacitance in theauxiliary winding circuit when operated from a 120V, 60Hz supply
The stator resistance of a 1-phase induction motor is 2.5 ohms and its leakage reactance is 2.0 ohms. Onno-load, the motor takes 4 A at 96 V and at 0.25 lagging power factor. The no-load friction andwindage loss is negligible. Under the blocked-rotor condition, the input power is 130 W at 6 A and42 V. Obtain the equivalent circuit parameters.
A 3-phase, 6 pole, 440 V, 60 Hz, Y-connected induction motor has the following impedances per phase referred to the stator circuit: R1=0.43 Ω, R2=0.54 Ω, X1=1.263 Ω, X2=0.608 Ω, XM=43Ω The total rotational losses are 1100 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 2 percent at the rated voltage and rated frequency, Find the motor speed, stator current, output power
Q11-b) A three-phase induction motor is used to drive many types of loads for example water pump and compressor. Explain the followings: i. The construction and its operational principle;ii. Synchronous speed, rotor speed, slip and their relationships,iii. Starting methods for induction motor,iv. Disadvantages of induction motor.
A 440 V, 22.5-hp, 50 Hz, 3-phase, 4-pole, star-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1 = 0.552X, = 1.1050Ra = 0.350X2 = 0.4562 Xy = 27.10 The total rotational losses are 1105 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 2.3% at the rated voltage and rated frequency, d) Electrical power,e) Output power,f) Efficiency.
A 440 V, 22.5-hp, 50 Hz, 3-phase, 4-pole, star-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1 = 0.552X, = 1.1050Ra = 0.350X2 = 0.4562 Xy = 27.10 The total rotational losses are 1105 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 2.3% at the rated voltage and rated frequency, calculate:a) Speed,b) Stator current.c) Power factor,d) Electrical power,e) Output power,f) Efficiency.g The shaft torque of the motor at rated load
The rotor resistance and standstill reactance of a 3-phase induction motor are respectively 0.015 ohmsand 0.09 ohms / phase. At normal voltage, the full-load torque at the full-load speed. b.) Calculate thepower factor.
A delta connected 1235 V, 50 Hz three phase induction motor has a star-connected slip-ring rotor with a phase transformation ratio of 4.2. The per phase rotor resistance and standstill leakage reactance are 0.0676 ohm and 0.031 ohm respectively. Assuming the stator impedance and magnetizing current are neglected. Calculate the the following, (i ) The rotor current at starting with slip-rings are short circuited. (ii) The rotor power factor at starting with slip-rings are short circuited. (iii) The rotor current at 3 % slip with slip-rings are short circuited. (iv) The rotor power factor at 3 % slip with slip-rings are short circuited. (v) The external rotor resistance per phase required to obtain a starting current of 65 A in the stator supply lines.
A 110-V, 50-Hz single phase induction motor (split -phase) has the following constants for the main and auxiliary windings: Main winding, Zm (1.2 +j 25) ohm and auxiliary winding, Z,= (12+j 5) ohm. Determine (i) total current and power factor currents at time of starting, and (ii) phase angle between the main winding current and starting winding current.