A 110-V, 240 Hp, 3Φ mesh-connected synchronous motor is working on full-load at an armature efficiency of 85% and at 0.8 pf leading. The armature reactance per phase is 5 Ω and the resistance is negligible. Calculate the induced emf. The answer is 1185 V

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 50-HP 400-volt 12-pole 60-Hz wye-connected 3-phase synchronous motor has armature resistance of…

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Q: At what speed will a four-pole three-phase motor operate at when supplied with 60 Hz? A. 1800 RPM…

A: We know synchronous speed Ns = (120 * f)/P Given f=60 hz   Poles P=4 Ns = (120 * 60)/4 Ns = 1800…

Q: 1= 20/70° A E = 80/40⁰ V

A: W need to find out reactance for given current and voltage

Q: Calculate the rotor reactance per phase of an 8 pole, 50Hz, 3Ø induction motor which develops a…

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Q: A three phase 480 V, 50 hp, 6 pole, 60 Hz induction motor has a full load slip of 2.5%. Determine…

A: Voltage VL = 480 V Power P0 = 50 hp Poles P = 6 Frequency   f = 60Hz Full load slip  S = 2.5%  =…

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: Select the following condition on three phase induction motor which gives very low value of slip. O…

A: Choose the correct option Which condition gives low value of slip on 3 phase induction motor.

Q: A 10-pole, 3-phase induction motor operates from a supply with frequency 55 Hz. Calculate the speed…

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Q: What is the copper loss in the rotor circuit in kW? An induction motor is running at 40% of the…

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Q: 1-1A current draws when a 40V DC voltage is applied to a Monophase AC motor.When 200V- 50HZ AC with…

A: Given,when, V=40 V, I = 1AWhen, V= 200V, I=4Af=50 Hz Power coefficient = 0.9

Q: 17. A small single phase, 240 V induction motor is tested in parallel with 160 N resistor. The motor…

A: It is given that: V=240 VR=160 ΩIm=2 AIT=3 A

Q: A 220 shunt motor has Ra= 0.05 ohm, Rsh =60 ohm and n max = 92.5% . What is the stray power loss.

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Q: A 3-phase asynchronous motor with a phase equivalent circuit like the figure, at what slip value is…

A: The given equivalent circuit of asynchronous motor is

Q: When 40V DC voltage is applied to a single-phase AC motor, it draws 1A current. When 200v-50Hz AC is…

A: When a dc voltage is applied , the power consumed will be real power = 40*1 = 40 W (v*I). When ac…

Q: A three phase induction motor operating at a slip of 5 % develops 20 kw rotor output power. What is…

A: The rotor copper loss in the above given operating conditions is calculated as shown below:

Q: A 300-Vo, 60-Hz, three-phase induction motor is drawing 20 A at 0.75 PF lagging. The stator copper…

A: Power input of a 3-phase induction motor can be expressed as : Pin= VinI.pfwhere,Vin= Input voltageI…

Q: Calculate the rotor reactance per phase of an 8 pole, 50Hz, 30 induction motor which develops a…

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Q: The power supplied to a three-phase induction motor is 20kW and the stator losses are 1000W. If the…

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Q: 3 Phase 50 Hz 25 Hp asynchronous motor 415 V triangle is working. It rotates at 1480 rpm/mın under…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: The full load speed of a 60 Hz, 3-phase induction motor is 1120 r.p.m. The number of poles in the…

A: induction motor always near to synchronous speed  and synchronous speed =120*frequencyn. of poles…

Q: induction motor has

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Q: Q2/460V,25Hp,60Hz,four pole, three phase Y-connected wound rotor induction motor has the following…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: The given pic is a single phase motor equivalent circuit I1 is the input current or the stator…

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Q: A 6 pole, 50 Hz, 1-phase Induction Motor runs at a speed of 900 rpm. The frequency of currents in…

A: We need to find out cage current frequency for given motor

Q: R a 0 Х R ли 2 л чее L= 10m H If V₂ = ±7√ when x goes to terminal a, what would be VL when t = 25ms?

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Q: LA 6-pole, 50 Hz single-phase inductor motor runs at a speed of 950 rpm. The frequency / frequencies…

A: Given -  frequency f = 50 Hz, Pole P = 6, Motor speed Nr= 900 rpm.   To find - Frequencies of…

Q: 4

A: The spherical shell having radius R and thickness t is shown below. The potential is related to the…

Q: the rotor frequency of a four-pole, 60 Hz induction motor with 5% full * load slip is 50 Hz O 60 Hz…

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Q: 3 Phase 50 Hz 25 Hp asynchronous motor 415 V triangle is working. It rotates at 1480 rpm/mın under…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: The sparking at the brushes of a dc generator is due to winding distribution high constant…

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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: 2. A 220V 30 6poles 50Hz induction motor is running at a slip of 3.5 %. Find the following: (a) slip…

A: 2. Given, 3-phase induction motor having  Supply Voltage, V = 220 Volts Number of poles, P = 6…

Q: A 4-pole induction motor, supplied by a slightly unbalanced three-phase 50 Hz source, is rotating at…

A: Given an induction motor with, Total number of pole, P=4. Frequency, f=50 Hz. Rotor speed, Nr=1440…

Q: (V/F) speed controt can be adopted in wound rotor induction motor? Hue, False

A: In any three phase induction motor, there are two main parts which are stator and rotor. The stator…

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.