What is armature and reaction, how does armature reaction affect alternator voltage according to load load type? explain
Q: The per phase dc armature resistance of an alternator is 0.5 0. The effective ac armature resistance…
A: The solution is given below
Q: A shunt generator has an output of 22 kW at a terminal voltage of 220 V. armature and shunt field…
A: In this question, Find the Overall efficiency of the machine? Efficiency= output power /input…
Q: The internal characteristics of DC shunt generator can be obtained from *
A: Internal characteristics of DC shunt generator obtained by the relationship between the generated…
Q: Elimination of armature reaction requires a series field winding O True False
A: The elimination of armature reaction requires compensating winding.
Q: 3. How does the armature reaction vary with the power factor of loads in an alternator?
A: Unity power factor: In case of unity power factor tha generated EMF lag the field flux by 90 degree.…
Q: Why small voltage is built up immediately in rotating shunt machine eve without field excitation?
A: For every self excited generator there must exist some residual flux . When armature rotates…
Q: 1- What is the main function of a diverter used in series wound DC motor? 2- What is the main…
A: In this question we will write main function of diverter used in series motor...Also main difference…
Q: QUESTION 2 To minimize the effect of armature reaction and keep the field lines straight between the…
A: Minimize the effects of armature reaction and keep the field lines straight between the poles of a…
Q: The open circuit characteristics of DC shunt generator starts with some * minimum voltage instead of…
A:
Q: A 30 kW, 4 pole 500 V DC shunt generator has an armature and shunt held resistances of 0.29 ohris…
A: Given, A DC shunt generator has, Terminal voltage (Vt) = 500 V Output power (Po) = 30 kW Number…
Q: What are the reasons for the drop in terminal voltage of self excited shunt generator When loaded?
A: With increases in the load, the terminal voltages of all dc shunt generators decrease.
Q: A short shunt compound DC generator supplies a load of 10A at a voltage of 10 volts. If the…
A: Answer (c) Although given machine is short shunt compound DC generator , In the case of short shunt…
Q: 21. The three factors which cause decrease in the terminal voltage of a shunt generator are (a)…
A: the three factors which cause decrease in the terminal voltage of a shunt generator are: if field…
Q: what are the advantages of speed control by flux control method?
A: The flux control method is ideal for smooth performance, cost-effectiveness and steady output.
Q: 5. What is the function of armature in a DC generator?
A:
Q: summarise the total losses of the DC Generator and draw for them ? *
A: In this question we will write about losses in dc machine or generator..
Q: Explain the term air-gap power or power developed in the rotor and shaft power. How these terms are…
A: Induction motor Explain Air gap power ? Power developed? Shaft rotor power?
Q: What are the necessary conditions for voltage build-up in dc shunt generator ?
A: The necessary conditions for voltage build up in a dc shunt generator is given below: The…
Q: Explain briefly in a few sentences the each question below. a) Why is the excitation control of…
A: a) why is the excitation control of generator needed? b) what is the type of load that requires…
Q: what are the advantages of speed control by flux control method? *
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: In DC shunt generator the type of current flows in field winding is AC whereas in armature winding…
A: As per the guidelines, we supposed to answer one question at a time so please ask other questions…
Q: Define the different types of AC Generator. - Define Three- Phase AC Generator. - Why does DC…
A: As per bartleby guideline for more than three sub-parts only first three are to be answered please…
Q: 7. In a 10 pole, lap wound dc armature, the number of active armature conductor per pole is 50. The…
A: Given data for lap wound dc armature No of pole = P = 10 No of active conductor per pole = 50
Q: In SPEED CONTROL OF 3 PHASE INDUCTION MOTOR [V/F METHOD] Why is kept constant in this expression?
A: SPEED CONTROL OF 3 PHASE INDUCTION MOTOR
Q: 8. The armature and shunt field resistance of a 50-kW, 220 V shunt generator is 0.026 ohm and 52…
A:
Q: Why it is much prefer in alternator to have station armature and rotating poles?
A: It is much prefer in alternator to have stationary armature and rotating poles because of the…
Q: The windings of short-shunt compound dc generator have the following resistances: Armature, shunt…
A: Short shunt compound DC generator Armature resistance Ra = 0.5ΩShunt field resistance Rsh = 253…
Q: In a DC shunt generator, the induced EMF is 230 V, the armature resistance is 0.1ohm and the…
A: Given: In dc shunt generator E=230 VRa=0.1 ΩIa=200 A
Q: SUBJECT = ELECTRIC MACHINE Why are the armature windings of an alternator always connected in star?…
A: The armature windings of an alternator is not connected in delta. It is always connected in star…
Q: determine (i) Generated EMF, (ii) Total Resistance, (iii) Armature Current, (iv) Terminal Voltage.
A:
Q: The core loss is the combined hysteresis and eddy current losses in the armature and field iron True…
A: In a transformer losses are of 4 types Core losses Copper losses Stray losses Dielectric losses
Q: The 20 KW, Shunt DC Generator ha a four-pole lap winding and generates 216-volts when running at…
A: Emf equation of DC generator = ((flux×speed×total armature conductors)/60)×(no.poles/no.of parallel…
Q: Draw and explain the important parts of DC Generator?
A: Commutator :- A commutator works like a rectifier that changes AC voltage to DC voltage within the…
Q: What are the necessary conditions for voltage build-up in d.c shunt generator?
A: there are some necessary conditions that must be satisfied for the dc shunt generator otherwise the…
Q: - The DC shunt generator will not build-up an e.m.f. if * a) The direction of armature rotation is…
A: condition for the build up of a shunt generator There must be some residual magnetism in the…
Q: b) Explain how the voltage buildup occur in a shunt DC generator during starting.
A:
Q: Which of the points indicated on the no-load characteristic of the DC generator corresponds to the…
A: Note: Since you have not specified any question to be answered, as per our honor code, we are…
Q: How should the armature be laminated for the purpose ? (DC GENERATOR QUESTION)
A:
Q: Discuss the reason why the generator terminal voltage varies with the electrical load?
A:
Q: DC motor. How the flu
A: A DC motor is a device that convert the electrical power into mechanical power. It works on DC…
Q: number of turns per phase? alternator induced voltage is? armature winding distrbution factor?…
A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…
Q: separately excited generator has no-load voltage of 125V. A certain load rated at 1200W, 120V is…
A:
Q: How does number of field poles and prime mover speed
A: In this question we will write How does number of field poles and prime mover speed affect the…
Q: An 8 pole DC shunt generator with wave winding has 4800 conductor with 20 turns and average per pole…
A: Need to find induced EMF and terminal voltage
Q: What is Armature reaction? Explain the conditions when armature reaction can be neglected for…
A: The effect of armature flux on the flux produced by the rotor field poles is called armature…
Q: True or False: In a dc generator, the armature current is a direct current
A: There are two source of magnetic flux that are present in DC machine, armature flux and main field…
Q: 1A Armature of fl A alternator V 220V D.C Supply f2 IA fl field + 0-220V - 220V winding 12 Report :…
A: We have given the following problem Draw the open (no load ) characteristic from the tables. Derive…
Q: 3. A DC generator has no-load output voltage of 150 volts. It's armature circuit resistance IS 0.95…
A: Given data No load voltage(VN) = 150V Armature resistance(Ra) = 0.95 Ohms P = 3000W at V = 115V…
Q: What are the reasons for the decrease in the voltage of the independent excitation generator during…
A: DC Generator: DC Generator is an electromechanical device which converts mechanical energy to…
What is armature and reaction, how does armature reaction affect alternator voltage according to load load type? explain
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- Problem-4, A field excitation of 20 A in a certain alternator results in an armature current of 400 A in short circuit and a terminal voltage of 2000 V on open circuit. What is the magnitude of the internal voltage drop within the machine at a load current of 200 A.A 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 connectedDEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: AC MACHINES Answer the following questions (A, B and C) depending on the topic. 1. ALTERNATORS A. Why is it necessary to maintain the speed of an alternator at all times and how do they control the speed of an alternator when in operation? B. Distinguish between half-coiled and full-coiled armature windings in alternators. C. Why are fractional pitch windings generally used in alternators?
- To have two alternators in parallel, which of the following factors should be identical for both? Voltage Frequency Phase sequence O Voltage, frequency, phase sequence and apparent power Voltage, frequency and phase sequence Voltage generated per phase in an alternator is proportional to Frequency of waveform Number of turns in armature Flux per pole Winding factors Everything mentioned in the optionsQ choose the correct answer: 1-Brushless excitation system consisting of.... a- Stator field winding and power diodes b-stator and rotor field winding and capacitor c- stator and rotor field winding and capacitor d- Everything mentioned in the options 2- Voltage generated per phase in an alternator is proportional to a- Flux per pole b- Number of turns in armature c-Winding factors d- Everything mentioned in the options e- Frequency of waveform 3- If input mech. Power of SG constant, the functionality of AVR is a- Control flux of rotor b-Control terminal voltage c- Control flux and terminal voltage d-Control Load anglewhat is the conclusion for the concepts of rotating amature and rotating field in an alternator?
- 2- A 4-pole, wave-wound d.c. shunt generator has an armature winding consisting of 300 turns each of 0.0020. The armature resistance is a) 0.152 b)0.62 c) 0.30 d) none of above12) Welding generator will have A. Lap winding B. Wave winding C. Delta winding D. Duplex wave winding E. Star winding 13) The demagnetizing component of armature reaction in a D.C. generator A. Reduces generator e.m.f. B. Increases armature speed C. Reduces interpoles flux density A. Results in sparking trouble B. All above 14) As the load is increased the speed of D.C. shunt motor will A. Reduce slightly B. Increase slightly C. Increase proportionately D. Remains unchanged E. None of the above 15) The speed of a D.C. motor can be varied by varying A. Field current B. Applied voltage C. Resistance in series with armature D. Both A & B E. Any of the aboveIn a separately excited generator supplying rated load the armature reaction. is always present is always absent O none of these may be sometimes present
- 1.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 Ish2Q)What are the necessary conditions for voltage build-up in d.c shunt generator?A 8 pole wave wound dc shunt generator runs at a speed of 900 rpm, has an armature and shunt field resistance of 0.7 N and 300 N respectively. The armature has 960 conductors and flux per pole is 0.057 Weber. If the lamp load connected has a resistance of 60 2, determine (i) Generated EMF, (ii) Total Resistance, (iii) Armature Current, (iv) Terminal Voltage. Generated EME (Eg) Total Resistance (Rt) Armature Current (la) Terminal Voltage (V)