A factory has asynchronous motor loads with a power of 200 kW and a power

Q: In a workshop, there is a three-phase asynchronous motor with a power of 6 HP, an efficiency of 85%,…

A: Given dataOutput power, Efficiency, Initial power factor, Final power factor, To find outWe have to…

Q: A three phase Y connected synchronous motor, 6600 V L-L , delivers 500 KW to the full load . Its…

A: Given data, Line Voltage, VL = 6600 V. Output power, Pout = 500 kW. Efficiency, η = 83% = 0.83.…

Q: following impedances in ohms per phase referred to the stator circuit: R1 = 0.1R 2, X = RQ, R2 =…

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Q: A three phase 250 hp induction motor operates at 0.8 lagging power factor on 440 V, 50 Hz supply.…

A: We have been given induction motor with, HP = 250 Hp Power factor (Cosϕ1) = 0.8 lagging Supply…

Q: The speed regulations of two 800-kW alternators A and B, running in parallel, are 100% to 104% and…

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Q: Why we use buck converter instead of using linear regulator?

A: We need to explain why we use buck converter instead of using linear regulator.

Q: A universal series motor, when operating on 220 Vdc draws 10A and runs at 1400 rpm. Find the new…

A: Universal Motor The Universal motor can operate either in a single-phase AC supply or DC supply. To…

Q: A 80 MVA synchronous generator has Xs = j8Ω. The generator is supplying its rated power to an…

A: Given synchronous generator :80 MVA  Xs = j8 Ω. bus  voltage :33KV and  power factor : 0.9

Q: Give Some application-s of motor,

A: A brief about DC Series Motor DC Series Motors have high starting torque and their speed…

Q: For a power system having induction motor loads, an overexcited synchronous motor is also attached.…

A: Power system with induction motor load and overexcited synchronous motor

Q: What are the disadvantages of low power factor?

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Q: V1 = 170 V  f1 = 100 Hz  1) A single-phase load has an active power of P = 2 kW at V1 V @f1Hz and…

A: Given V1 = 170 V  f1 = 100 Hz  Active power of P = 2 kW  power factor is cosφ = 0.75. This motor is…

Q: Input real power per phase of an induction machine with phase input voltage of 220Z0 and input…

A: In this question , we have to find out real power..

Q: A Flyback converter (for questions 1-3) shown below has the following parameters. Vin=100V, Vo=20V,…

A: Note: As per our policy, I have attempted the first three questions. Given data: Vin=100 VVo=20…

Q: 6. A 2000KVA, 3300V, 3-phase star -connected altemator delivers rated load at a P.F. of…

A: For an electrical machine efficiency is a very important parameter it tell us about how much power…

Q: For two parallel synchronous generators of the same size and same droop in frequency-Active Power…

A: for two parallel synchronous generators of the same size and same droop in frequency active power…

Q: Assume that a three-phase 700KW, 50 Hz, 4200V (Line to Line) Wye-connected induction motor has a…

A: The solution is given below

Q: A three-phase, 3.3 kV, 50 Hz power supply is used to drive an induction motor. The motor has an…

A: If you have any doubts feel free to ask.... Thankyou

Q: Explain the concept of power factor correction using a capacitor. List any two benefits of power…

A: Power factor correction is the process of improving the power factor of an electrical system by…

Q: Example 41: A single phase 120V AC control power to 5M2 load using integral cycle controller if the…

A: Given : AC voltage controller rms voltage =120 v Load resistance R = 5m Ω =5x106 ohm On integral…

Q: A load of 500 kW has a power factor of 0.6 lagging. Combined power factor is to be 0.9 using over…

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Q: llustrate open circuit internal circuit and external characteristic for dc shunt generator

A: Internal characteristics:   The graph which shows the relationship between load generated emf and…

Q: A synchronous motor with delta conductive coils is fed from a 480V source. Its synchronous impedance…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Write short notes on capacitor start single phase induction motor and Capacitor start capacitor run…

A: Starting of Single phase motor Split Phase Motor Capacitor Start Capacitor Run Motor Capacitor…

Q: ated output with a power factor of 80%. The DC armature resistance at 70°C between terminals is 0.08…

A: Given, Alternator rating = 1500KVA, 2300 V, 3-PHASE, Y-connected Power factor = 80% At 70° C,…

Q: Q1:If the power factor of an induction motor is measured at 0.8±5%. Calculate the limiting error and…

A: Measurement- It is process to comparison between standard and unknown and the magnitude of resulting…

Q: If the number of slots per pole in a synchronous machine is 9 and each coil spans 6 slot pitches,…

A: For this problem we can easily find pitch factor by finding slot angle .

Q: Comment briefly on the relationship between input and output power at varying excitation levels and…

A: Infinite Bus Bar is the bus bar where many(infinite)  synchronous machines are connected.  The…

Q: b) For the following applications which type of DC motors do you select? Explain the reason. i)…

A: (b) According to the type of application dc motors are selected. For: (i) Electric train: DC series…

Q: A synchronous motor capable of operating with a leading power factor draws 15 kW from a distribution…

A: Synchronous motors revolve with a constant (synchronous) speed, as the name suggests. This type of…

Q: A 5MW rated power wind turbine has a rotational speed of 20 rpm. If the wind speed is 54km/hr and…

A: Given: A 5MW rated power wind turbine has a rotational speed of 20 rpm. If the wind speed is 54km/hr…

Q: An overexcited Synchronous motor at no-load means that the PF angle is equal to: Select one: a. 45º…

A: At no load the synchronous motor when over excited takes a current at zero pf leading.

Q: A a Single phase 400W, 50 Hz motor takes Suply current of SOA at power factor of 0.6 Lagging The…

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Q: How to adjust reactive power in synchronous machine? A) by changing the load applied to the shaft…

A: It is known that a synchronous generator, will deliver reactive power  when Efcosδ>V…

Q: 4) A 40-kW induction motor, with a lagging power factor of 0.76 is supplied by a 120-Vrms, 60-Hz…

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Q: A cylindrical rotor machine is delivering active power of 0.85 p.u. and reactive power of 0.62 p.u.…

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Q: 5. Analyzing an AC power outlet: a. Identify the common names for measurements 1, 2, 3, and 4 for…

A: The waveform,

Q: The supply frequency is not afffecting the rotor ..............of the three phase induction moto?

A: We need to fill the blank space.

Q: Q-1. 0.75 h.p., 110 V, single-phase induction motor (split-phase) takes a current of 6 A lagging the…

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Q: Three separately excited DC generators are connected in parallei to sopply wcol fond current of…

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Q: V1 = 170 V  f1 = 100 Hz  1) A single-phase load has an active power of P = 2 kW at V1 V @f1Hz and…

A: The active power consumed by a 1∅ motor (P) is given by: Where, The voltage across 1∅ motor is “V”,…

Q: in short write a note on capacitive compensation for power factor control?

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Q: A 6.6 kV, star-connected,3-phase, synchronous motor works at constant voltage and constant…

A: It is given that: VL=6.6 KV=6.6×103 VZS=2+j20 Ω/ph

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.