b) Why the power factor of three-phase induction motor low at no-load and increase applied load increasing? as
Q: In Experiment Star-Delta Starting of 3-Phase Induction Motor, How it was made sure in the control…
A: Star-Delta starter: This method can only be applied to the motor where the stator of the motor is…
Q: For a 3-phase slip-ring induction motor, the maximum torque is 2-5 times the full-load torque and…
A: Given data:Tmax=2.5 TFLTst=1.5 TFLsfl=3% or 0.03
Q: 2)List the methods of speed control of three phase induction motor from both stator and rotor sides?
A: Since you posted the multiple question so I solve 2nd questions for you List of speed control from…
Q: load, ascertain whether it is running at lagging power factor or a leading power factor without the…
A: An AC motor is an electrical machine which takes AC electrical input energy and produces mechanical…
Q: 2-1 Draw Stator circuits for different types of single phase induction motor (starting method) and…
A: According to our policy, we are authorized to answer one question at a time, since you have not…
Q: Can an induction motor work as a generator ? Why ?
A: An AC motor is an electrical machine that takes AC electrical input energy and produces mechanical…
Q: 1) Explain why we fixed the ratio of V/f in experiment to control the speed of three phase induction…
A: if we decrease frequency flux increases but at the same time if we decrease voltage flux will also…
Q: b) Why the power factor of three-phase induction motor low at no-load and increase as applied load…
A: Power Factor = Real Power/Apparent Power,or p.f. = W/VA.Then the cosine of the resulting angle…
Q: 4: Explain the Speed Torque Characteristics of Three phase induction motor. Additionally, present a…
A: The Speed Torque Characteristics- 1. At no load condition, the rotor slip and frequency are very…
Q: a. With the aid of a diagram explain the principle of operation of a three-phase asynchronous motor.…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: "Explain why speed of a DC motor get affected on load, if its series field winding is connected…
A: DC motor emf equation is given as, E=NPϕZ60AN=EA60PϕZk=PZ60ASo, N=EKϕ The torque equation of the DC…
Q: a) Explain requirement of V/f control method of the induction motor for the below and above the base…
A: Hhhff
Q: In In Star-Delta Starting of 3-Phase Induction Motor What is the relationship between star and delta…
A: Star - Delta starter is used only for the motors which have Delta connected Stator under running…
Q: three phase induction motor with supply frequency of 60 Hz, 8 poles. If the slip is 2.5 % at a…
A:
Q: discuss a) the magetising current (Im) of 3-phase motor b) how will you design the rotor of a…
A: Electrical machines can be either generator or motors. They can be either Ac machines or DC…
Q: and the circuit [56-8 %] torque 4. For a 3-phase slip-ring induction motor, the maximum torque is…
A: Given Few parameters of slip ring induction motor.we need to determine the percentage reduction of…
Q: 3- Why does a cumulatively compound D.C motor at light load behave approximately as a shunt D.C and…
A: The torque-speed (c/s) of a cumulatively compound D.C motor At light loads, the series field has a…
Q: Why the power factor of three-phase induction motor low at no-load and increase as applied load…
A: Power factor is define the cosine of power factor angle. So Why the power factor of three-phase…
Q: Q3) I. What' s the effect of The auxiliary winding of split - phase induction motor when it becomes…
A: In this question We need to check the effects if the auxiliary winding is short circuit of split…
Q: . Why the rotor flux is lagging with respect to stator flux of an induction motor? 2. How does a…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: 2. What are the methods of starting three phase induction motor?
A: Electrical machines can be either generator , transformers or motors. They can be either Ac machines…
Q: Explain the D.C resistance test to find the value of stator resistance of the star and delta…
A: DC Resistance Test:In the event that a DC voltage is applied to the stator terminals, there will be…
Q: Explain frequency control of 3 phase induction motor from voltage source with constant maximum…
A: According to the question we have to explain frequency control of the 3phase induction motor from…
Q: hematic diagram for No - load test on three phase induction motor. Which loss in the machine is…
A: No Load Test: We can find core losses by conducting no-load test. As core losses depends on Voltage…
Q: How to reduce eddy current losses produced in a three phase induction motor? O a. All given choices…
A: The hyterisis loss and the eddy current loss are present is in three-phase induction motor. it is…
Q: For a 3-phase slip-ring induction motor , the maximum torque is 2.5times the full-load torque and…
A:
Q: A 3-phase induction motor , the impedance of star connected stator winding is 0.2+j 3 ohm per phase.…
A: According to the question we have to calculate rotor current and power factor at rated speed with…
Q: The following characteristic curve represents: VT Select one: O a. The terminal characteristic of…
A: The given characteristics curve is,
Q: For a 3-phase, 4-pole, 50 Hz synchronous motor the frequency, no. of poles, and the load torque are…
A: Given: P1=4f1=50 Hz The number of poles, frequency and load torque is halved.
Q: Phasor Diagram of Salient Pole Synchronous Motor for unity power factor
A:
Q: Give a comparison among speed control methods of 3-Φ induction motor.
A: In order to implement variable speed drive in an induction motor we have to control the speed. There…
Q: The no- load speed of 3=phase, 4-pole, induction motor connected to a 3-phase 50HZ .supply is…
A: Three phase induction motor-When a three-phase stator displaced by 120 degrees (in space of 120…
Q: 1- Give the main purpose of the no-load test in (3 - 0) squirrel cage induction motor?
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: you mean by 'V-curves' of a synchronous motor? Draw them showing leading power factor and lagging…
A: In this we will write about V curve...
Q: 1. What is the difference between circle diagram method and equivalent circuit method in calculating…
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: In induction motors What is the difference between nominal, rated , nominal conditions,free shaft…
A: Here it is asked to mention the difference between nominal conditions, free shaft conditions and…
Q: Give a comparison among speed control methods of 3-0 induction motor.
A:
Q: IM
A:
Q: Draw and explain the equivalent circuit of a single-phase induction motor based on double field…
A:
Q: 4. What advantage you can obtain from an over excited synchronous motor at no load?
A: Over Excited Synchronous Motor If DC field excitation of synchronous motor is such that back EMF…
Q: 4. In a three-phase induction motor power factor at starting is ..... while running. Why? 5. What…
A: 4) In three phase induction motor power factor at starting is low compared to power factor while…
Q: With neat diagram explain slip ring rotor of 3-phase induction motor. Also draw and explain the…
A: 3-Phase slip ring Induction motor- 3-Phase induction machine- When three-phase stator displaced by…
Q: We make( V/F) constant in speed control of three-phase induction motor in order to make motor torque…
A: SPEED CONTROL OF 3-PHASE INDUCTION MOTOR:- Variable frequency control: The Synchronous speed of an…
Q: In a certain 3-phase induction motor, the resistance is one fifth the leakage reactance for both…
A:
Q: Select the answer Questions: 1. Synchronous motor for power factor correction operates at a. No…
A: 1 we know that synchronous motor acts as synchronous condensor under over excited…
Q: Explain the Starting of Single Phase Induction Motors?
A: According to the question we have to Explain the Starting of Single Phase Induction Motors
Q: Q28/ For a 3-phase slip-ring induction motor, the maximum torque is 2.5times the full-load torque…
A: As per our company guidelines, we are supposed to answer one question at a time. Iam not 100 percent…
Q: Analysis of Balanced Three-Phase Induction Motor Performance under Unbalanced Supply?
A: The analysis or study of a balanced three-phase induction motor's performance under the unbalanced…
Q: What are the differences in power factor, torque, speed, output power and efficiency of star…
A:
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- For Problem 3.18, the motor operates at full load, at 0.8 power factor leading, and at a terminal voltage of 10.45 kV. Determine (a) the voltage at bus 1, which is the generator bus, and (b) the generator and motor internal EMFs.A long shunt compound DC generator delivers a load current of 150A at 230V and has armature, series field and shunt field resistances of 0.032, 0.015 and 92Ωrespectively. Calculate (i) induced emf (ii) total power generated and (iii) distribution of this power (iv) voltage regulationA 25kVA, 3-phase, wye connected, the 400-V synchronous generator has a synchronous reactance of 1.6 per phase. The generator is to have zero voltage regulation at full-load. Neglecting the armature resistance, find the operating power factor and the developed power.
- a) 3-phase star-connected synchronous generator supplies a current of 10A having phase angle of 20° lagging 400V (phase voltage). Given the direct and quadrature axis reactances as 10ohms and 6.5ohms respectively and neglecting armature resistance, Find: 1. The load angle 2 The direct and quadrature components of armature currents 3. Voltage regulationQ2)A. Explain compound DC generator, also describe its types and terminal characteristics of compound DC generator. proper explanation and diagrama) With the aid of a diagram and phasor diagram, explain the double-reactance concept for salient-pole alternators. b) 3-phase star-connected synchronous generator supplies a current of 10A having phase angle of 20° lagging 400V (phase voltage). Given the direct and quadrature axis reactances as 10ohms and 6.5ohms respectively and neglecting armature resistance, Find: 1. The load angle 2 The direct and quadrature components of armature currents 3. Voltage regulation
- A 3 phase 4MVA, 12 kV star connected synchronous generator has Zs= 0.8+J30 ohm. Using circle diagram only, find: 1. The output power developed at unity power factor with excitation equal to 1.25 of rated voltage. 2. The load angle and power factor if the generator supplies (1500 KW) at rated voltage and excitation lequal to (1.2) of rated voltage. 3. Repeat part (2) when .armature resistance is neglectedCompare and contrast a cumulative compound DC generator and a differential compound DC generator in terms of performance. Note: Explain in no more than 70 wordsA long shunt generator delivers 25kW at 220V. The shunt, series and armature resistances are 50ohms, 0.02ohms, and 0.05ohms respectively, calculate the generated emf.
- A 100KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as synchronous reactance and the armature resistance is negligible and the generator is working at the full load and unity power factor then find the value of the induced emf voltage(line to line).What is FACTS (Flexible AC Transmission System), and how does it enhance the control and stability of power systems?(vi) Explain the concept of load transfer between the DC generators operating in parallel using load –voltage characteristics.