RA RF VT EA LF Figure 15.21

Q: A de series motor has an armature resistance of 0.12 02 and field resistance of 0.08 2. The supply…

A: Given a dc series motor with armature resistance 0.12 ohms and series field resistance of 0.08 ohms…

Q: What is the difference between direct and alternating current? p 3:01 Why are alternating current…

A:

Q: 3Electromechanics

A:

Q: A short-shunt compound generator delivers a load current of 30 A at 220 V, and has armature,…

A:

Q: A series-connected motor drives a load from a 50-V source at a speed of 1500 rpm. The load torque is…

A: Here, the torque is proportional to the speed as,

Q: Consider a separately-excited DC motor with an armature resistance RA =0.25 ohm and terminal voltage…

A:

Q: In a 3-phase, 6-pole induction motor, The power crossing the air gap of a 60 Hz is 42.6 kW, and the…

A: An AC motor is an electrical machine which takes AC electrical input energy and produces mechanical…

Q: A four-pole Shunt connected generates 120 V. If the generator supplies an incandescence lamp (100V,…

A:

Q: 2)The maxinium at load angles of.... 3)The primary winding of a 220/6 V, 50 Hz transformer is…

A:

Q: In the load characteristic of a separately-excited DC generator, its output voltage decreases with…

A: The separately-excited DC generator the field winding can be excited by an external source. This…

Q: Determine Ic in the given circuit if VBB = 5V, VCC = 15V, RB = 10k and RC = 200 Q. Assume ß = 100 *…

A: Determine collector current IC fo the given circuit : If,VBB=5 VVCC=15 VRB=10 KΩRC=200 Ωassume…

Q: 300 V D.C. shunt motor runs at 300 r.p.m. ,takes 10 A and induces the emf of 50V. The armature and…

A:

Q: Draw the approximate equivalent (without Xm) circuit of an induction motor and derive the equation…

A: Induction motor working Principle When an ac supply is connected to a stator it creates a rotating…

Q: A shunt generator has a full load current of 196 amp. at 220 V. The stray losses are 720 watts and…

A:

Q: 5. A 230V series motor with 4-pole, 600 conductors wave-connected supplying a load of 7.5kW by…

A:

Q: A 250 V DC shunt generator has a constant loss of 1250 W. Find the load current for maximum…

A: Solution: Shunt generator; V=250 v, Constant loss =1250 W, Find the load current for maximum…

Q: The synchronous reactance of a cylindrical rotor machine is 1.0 p.u. The machine is connected to an…

A: The question is based on the power angle equation of a synchronous machine in pu (per unit). P = EVX…

Q: A series-connected motor drives a constant torque load from a 50-V source at a speed of 1500 rpm.…

A: Given: A dc series motor connected to a constant torque load.

Q: An eight-pole, 24 KW, 100 V, DC machine has a duplex LAP-wound armature which has 64 coils with 10…

A:

Q: / A 110-V shunt generator has a full-load current of 100 A, shunt field resistance of 55 Ω and…

A:

Q: Consider a separately-excited DC motor with an armature resistance RA = 0.2 ohm and terminal voltage…

A: Given: Rated speed, N1=1200 rpmRA=0.2 ΩVT=130 VVF=360V

Q: A shunt dc motor has RA = 0.1 Ω and VT = 440 V. For an output power of 50 hp, we have nm = 1500 rpm…

A: developed power = back emf * armature current .  armature copper losses = armature current2 *…

Q: Consider a separately-excited DC motor with an armature resistance RA =0.252 and terminal voltage VT…

A: In this question we need to find a starting armature current of motor.

Q: A synchronous generator with a synchronous reactance of 1.15 p.u. is connected to an infinite bus…

A: Given data, Xs=1.15 puV=1.0 VXe=0.15 puPmax.=1.2 pu

Q: A 250V series motor runs at 500 rpm at rated load current of 75 A. The armature circuit has a…

A: It is given that: V=250 VN1=500 rpmIL1=Ia1=75 ARa+Rse=0.2 Ωϕ α Ia

Q: 6) The speed of a d.c. motor can be controlled by varying its flux per pole or resistance of…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: An induction motor of 10 kW rated mechanical power and an overall efficiency of 80%. The rotational…

A: An induction motor 10kW rated mechanical power and an overall efficiency of 80% .  The rotational…

Q: In the load characteristics of a separately-excited DC generator, its output voltage decreases with…

A: The separately-excited DC generator the filed winding can be excited by an external source. This…

Q: A 1000rpm DC shunt generator is supplying 100 lamps of 60W at 230V, the armature and field…

A: Given data: N=1000 rpm 100 lamps, P=60W, V=230V  Ra=0.2 ohm Rf=115 ohm

Q: A 415V 50HZ 50hP 34 8 pole induction motor is drawing 65A at 0.80pf lagging. Slip is given as 2…

A: The relationship between Horse power ( HP ) and Watts is 1Hp = 735W                        = 0.735kW

Q: A shunt excited DC motor consumes 8Kw by feeding it from a 500V line and driving a load at 1000RPM.…

A: In this question, A shunt excited DC motor Power consumes 8Kw V=500V line and driving a load speed…

Q: A separately excited dc motor (see the equivalent circuit shown in Figure 15.21 on page 770) has…

A: Given Armature resistance Ra=1.3 Ω Terminal voltage VT=220 V Output power Pout=3 hp…

Q: V DC separately excited motor has ure resistance 2 ohms and voltage constant V /rad/s. The field…

A: Note: As the question data is incomplete, still i am trying to solve it by taking some random data.…

Q: Consider a separately-excited DC motor with an armature resistance RA= 0.25 2 and terminal voltage…

A: Given data:A separately excited DC motor with,Field resistance Field voltage Armature terminal…

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

A:

Q: A 500-hp, 600-volt DC motor operates at 495rpm at full load. if the flux per pole is0.1 webers and…

A: Here, K = 1.3exp(-7 flux per pole = 0.1 weber N = 495

Q: A 5 kW 125 V shunt generator operates at 1800 r/min If the field current is 1.8 A and the armature…

A: Output power Terminal voltage Field current Armature resistance

Q: A DC series motor takes the current of 15A and terminal voltage is 220 V. The armature and field…

A: In this question, choose the correct options A DC series motor takes the current of 15A and terminal…

Q: A 3-phase induction motor has a star-connected rotor. The rotor e.m.f. at standstill is 50V. The…

A: Given data, Emf is given, E=50 V Resistance is given R=0.5 Ω Reactance is given X=3 Ω

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.