A shunt generator supply 100A at 200 V. The armature and shunt resistance are 0.025 and 100 ohms respectively. If the copper losses are equal to the iron losses at this load. Find the HP of engine driving the generator
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- The armature and field resistances of a series machine are 0.2 ohm and 0.3 ohms respectively. While running as a generator, the generated emf is 250V at 1200rpm. If the machine is run as motor, it takes 4A at220V. At a certain load, the motor takes 30A at 220V. However, on load, the armature reaction weakens the field by 4%. Find the motor speed at this load.A d.c. shunt machine has armature and field resistances of 0.025 Ω and 80 Ω respectively. When connected to constant 400-V bus-bars and driven as a generator at 450 r.p.m., it delivers 120 kW. Calculate its speed when running as a motor and absorbing 120 kW from the same bus-barsElectrical Engineering Dep. Electrical Machine Lab. NO LOAD CHARACTERISTIC OF DC MOTORS DISCUSSION 1- Comment on the curves obtained . 2- What are the types of the losses in the DC machines?
- a 220V shunt generator has an armature resistance of 0.02ohms and a shunt field resistance of 44 ohms. at rate load, the driving engine develops 62.26 hp. If the iron and friction losses amount to 1600W, how much is the current delivered to the load at this condition? (Our subject is ELECTRICAL MACHINE 1, and our lesson is Losses an Efficiency in DC Machine) (I need clean solution ma'am/sir, thank you so much)a dc shunt generator supplies a load of 10kW at 250V calculate the induced emf,if the armature resistance is o.5ohm and the shunt field resistance is 100ohmA 220V shunt generator has an armature resistance of 0.02ohms and a shunt field resistance of 44ohms. at rate load, the driving engine develops 62.26hp. If the iron and friction losses amount to 1600W, how much is the current delivered to the load at this condition? (Our subject is ELECTRICAL MACHINE 1, and our lesson is Losses and Efficiency on the DC MACHINE) (I need a clean solution ma'am/sir. Thank you do much)
- A DC series motor operates at 800rpm with a line current of 100A from 230V mains supply. Its armature and field resistances are 0.15 ohms and 0.1 ohms respectively. Find the speed at which motor runs at a line current of 25A, assuming the flux at this current is 45% of the flux at 100A.Need ASAP. Will upvote!a dc machine runs no load with a speed of 200 rad/s. The applied armature voltage is Va = 120 V. At a load of 5Nm the speed drops by 10 rad/s.a) what is the voltage for a no load speed of 150 rad/s? B) What is the current for a torque load of 5Nm? c) What voltage is needed to run the machine at 200 rad/s with a torque of 5Nm?The field and armature resistances of a 220-V series dc motorare 0.2 ohms and 0.1 ohms respectively. The motor takes 30 A ofcurrent while running at 700 rpm. If the total iron and frictionlosses are 350 W, find the efficiency.
- A 4-pole, lap-wound dc machine has 738 armature conductors. Its field winding is excited from a dc source to create an air-gap flux of 27 mWb/pole. The machine (generator) is run from a primemover (diesel engine) at 1200 rpm. It supplies a current of 80 A to an electric load. (a) Calculate the electromagnetic power developed. (b) What is the mechanical power that is fed from the primemover to the generator?A shunt generator delivers 195 A at terminal p.m. of 250 V. The armature resistance and shunt field resistance are 0.02 ohm and 50 ohm respectively. The iron and friction losses equal 950 W. Find (a) E.M.F. generated (b) Cu losses (c) output of the prime mover (d) commercial, mechanical and electrical efficiencies.• A DC shunt machine while running as generator develops a voltage of 250 V at 1000 r.p.m. on no-load. It has armature resistance of 0.5 ohm and field resistance of 250 ohm. When the machine runs as motor, input to it at no-load is 4 A at 250 V. Calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4 %