Explain the working of three point starter for starting d.c. shunt motor and state its disadvantages.
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A: Dear student as per our guidelines we are supposed to solve only one question.kindly repost other…
Q: A shunt DC motor is connected to a load which is pulling 3A armature current. Armature resistance is…
A: The solution is given below
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Q: 03 (A)- Prove with aid of required figure and diagrams that the angular speed (w) of d.c. Shunt…
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Q: A 440 V d.c. Armature resistance of shunt motor is 0.25 Ω and field winding resistance is 220 Ω. A…
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A: This question belongs to electrical machine . It is based on the concept of dc shunt motor and…
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A: Armature reaction is the effect that armature field is made in main field. Or we can say that it is…
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A: (3.a) Voltage regulation :- It is the change in output voltage as load changes from no-load to full…
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Q: 2. What is the function of starter for medium and large size Induction Motors?
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Q: Draw the schematic diagram of magnetic starter showing the power and control circuit of a shunt dc…
A: Magnetic starter - A magnetic starter is an electromagnetically controlled switch. the magnetic…
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Q: 220 V, dc shunt motor draws 5 A while running at 800 rpm on load. Calculate the speed when the motor…
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Q: 02 A 230 V motor has an armature circuit resistance of 0.6 Q. If the full-load armature urrent is 30…
A: As per our guidelines we are supposed to answer only one question. Kindly repost other question as…
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A: Starting circuit of the DC motor is designed as shown below
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A: Given data, V=125 VI=16 ARa=0.3 ΩRsh=50 ΩRse=0.6 Ω
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Q: A 230 V, d.c. shunt motor runs at 1000 r.p.m. on full load, drawing current of 10 A. The shunt field…
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Q: 7. A 4-pole, 500V shunt motor has 720 wave connected conductors on its armature. The ful armature…
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Q: 34A shunt motor has a rated armature current of 40A whe The rated speed of the motor is 1000 rpm.…
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Q: A 250V shunt motor runs at its normal speed of 25rps when the armature current is 100A.The…
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Q: xplain with aid of a diagram how armature speed control of a dc motor is attained
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Q: A shunt motor designed to operate at 115 V, has an armature resistance is 0.12 ohms and the motor is…
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Q: 1. Draw the schematic diagram of magnetic starter showing the power and control circuit of a shunt…
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Q: 5. How does the saturation in the machine affect the speed of shunt motor?
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Q: Q1: A (250) V, d.c. shunt motor takes a line current of (20) A, Resistance of shunt field winding is…
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Q: When a series dc motor is operated without a load, which of the following conditions occurs? * O The…
A: It is known that for DC series motor load decides the amount of armature current .when load of motor…
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- CRPET 2amEiNee 4 - Explain, resistance ? S - Why it without load 6 - Which is be wused in answer . in details, why it is necessary to is not possible to start the d. c. 2 use starting series motor perferable ( d. c. shunt or d. c. series motor ) to places require high starting torque ? prove yourWhat value of resistance should be inserted in the armature circuit of a 200 V, 1000r.p.m., shunt motor to reduced its speed to 800 r.p.m. When drawing 20 A. Armatureresistance is 0.5. (Ans.1.9 ohm)Why are different motor connections shown for what appears to be the same motor in the various diagrams in Figure 332? FIG. 332 Typical arrangements for four-speed, three-phase, two-winding motors.
- A 240V shunt motor, running on no-load and at normal speed, takes an armature current of 2.4 A froma 240Vsupply. The resistance of the field circuit is 240Ω, and that of the armature is 0.25Ω. Calculatethe motor output power and efficiency when drawing a line current of 35 A from the supplyComplete the wiring diagrams as per Worksheets 5-A and 5-B then solve for "A" through "G" for the DC motor on Worksheets 5-A and 5-B when it is running at capacity and its specifications are as follows:Rated input = 125 volts, 16 ampsArmature Resistance = 0.3 ohms(Ω)Shunt Field Resistance = 50 ohms (Ω)Series Field Resistance = 0.6 ohm (Ω)Rheostat Resistance = 12.5 ohm (Ω)A) Voltage drop of armature (IR-arm)a) 4.05 V b) 120.95 V c) 125 V d) 129.5 VB) Voltage generated by motor (E-cemf)a) 4.05 V b) 120.95 V c) 125 V d) 129.5 VC) power consumed by shynt field(p-shunt)a) 54.68 W, b) 312.5 W, c) 1632.83 W, d) 2000 WD) power consumend by armature resistance( P-arm)a) 54.68 W , b) 312.5 W, c) 1632.83 W , d) 3000 WComplete the wiring diagrams as per Worksheets 5-A and 5-B then solve for "A" through "G" for the DC motor on Worksheets 5-A and 5-B when it is running at capacity and its specifications are as follows:Rated input = 125 volts, 16 ampsArmature Resistance = 0.3 ohms(Ω)Shunt Field Resistance = 50 ohms (Ω)Series Field Resistance = 0.6 ohm (Ω)Rheostat Resistance = 12.5 ohm (Ω)A) Shunt field current (I-shunt)a) 2.5 A b) 13.5A c) 16 A d) 18.5 AB) Armature current (I-arm)a) 2.5 A b) 13.5A c) 16 A d) 18.5 AC) Voltage drop of shunt field (I-shunt)a) 4.05 V b) 120.95 V c) 125 V d) 129.5 VD) Voltage drop of armature (IR-arm)
- A 230 V, d.c. shunt motor runs at 1000 r.p.m. on full load, drawing current of 10 A. The shunt field resistance is 230 ohm and the armature resistance is 0.5 ohm, Calculate the resistance to be inserted in series with the armature so that the speed at full load is 950 r.p.m.A Long Shunt Compound DC Generator supplies 90-amp at 120-volt. Series field resistance of 0.03-ohm, armature and brush contact resistance is 0.04-ohm, shunt field resistance of 46- ohm and compensating resistance of 0.009-ohm, the Iron and friction losses mount to 458- watts. Find the over all efficiency.A 250 V shunt motor on no-load runs at 1000 r.p.m. and takes 5 A. The total armature and shunt field resistances are respectively 0.2 ohm and 250 ohms. Calculate the speed when loaded and taking a current of 50 A, if armature reaction weakens the field by 3%.
- The armature and field circuits of a 230-volt shunt motor have resistance of 0.31 and 115 ohms respectively. It takes 52 A when operating at a certain load. What is the counter emf?A shunt motor has a nameplate rating of 140 hp, 500 V, 205 A, 1700 rpm. The shunt field circuit resistance is 280 ohms, and the resistance of the complete armature circuit is 0.17 ohms. Calculate the stray losses.19.a. The magnets that are used in the field of a quality DC PM motor are made fromA. rare-earth material.B. special aluminum-nickel compounds.C. natural magnets.D. magnetized steel.End of exam19.b. A DC motor that has interpoles will have the interpole windings inA. parallel with the armature.B. series with the field windings.C. series with the armature.D. parallel with the field windings.