Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating at a speed of 320 rpm. Then the developed useful torque is 2. A 4 pole, lap wound d.c. motor drawing an armature current of 20 A has 360 conductors. If the flux per pole is 0.015 Wb then the gross torque developed by the armature of motor is 3. A 220 V, d.c. motor draws an armature current of 20 A. Its armature...
An eight-pole, 25-kW, 120-V de generator has a duplex lap-wound armature which has 64 coils with 10 turns per coil. Its rated speed is 3600 rpm. 1. How much flux per pole is required to produce the rated voltage in this generator at no-load conditions? 2. What is the current per path in the armature of this generator at the rated load? 3. What is the induced torque in this machine at the rated load?
An eight-pole, 25-kW, 120-V de generator has a duplex lap-wound armature which has 64 coils with 10 turns per coil. Its rated speed is 3600 rpm. 1. How much flux per pole is required to produce the rated voltage in this generator at no-load conditions? 2. What is the current per path in the armature of this generator at the rated load? 3. What is the induced torque in this machine at the rated load?
An eight-pole, 25-kW, 120-V de generator has a duplex lap-wound armature which has 64 coils with 10 turns per coil. Its rated speed is 3600 rpm. 1. How much flux per pole is required to produce the rated voltage in this generator at no-load conditions? 2. What is the current per path in the armature of this generator at the rated load? 3. What is the induced torque in this machine at the rated load?
A 480-V, 60-Hz, A-connected, four-pole synchronous generator has a synchronous reactance of 0.1 ohm and an armature resistance of 0.0 15 ohm. At full load, the machine supplies 1200 A at 0.8 PF lagging. Under full-load conditions, the friction and windage losses are 40 kW, and the core losses are 30 kW. Ignore any field circuit losses c) How much power is the generator now supplying? How much power is supplied to the generator by the prime mover? What is...
A 25 Ω load is connected to the terminals of a 400 V terminal voltage parallel excited DC generator. The resistance of the field circuit is 200 Ω, the resistance of the armature is 0,4 Ω, the efficiency is 82%, the speed is 1000 r/min. Draw the equivalent circuit of the generator. Calculate the induced emf, the torque and the magnetic losses if the mechanical losses is 200 W.
Quesition a1. An eight-pole, 25 kW, 120 V DC generator has a duplex lap-wound armature, which has 64 coils with 16 turns per coil. Its rated speed is 2400 rpm. (a) How much flux per pole is required to produce the rated voltage in this generator at no load conditions? (b) What is the induced torque in this machine at...
Question: An eight-pole, 25 kW, 120 V DC generator has a duplex lap-wound armature, which has 64 coils with 16 turns per coil. Its rated speed is 2400 rpm.(a) Define a duplex lap-wound DC armature. (b) How much flux per pole is required to produce the rated voltage in this generator at no load conditions? (c) What is the induced torque in this machine at rated load? (d) Determine path current in the armature of this generator at the rated load? ...
QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an armature resistance of 0.1 ohm, is delivering 80 % of rated power to the mains at rated voltage when being run at 1000 r.p.m. (revolutions per minute). The field circuit resistance is 220 ohms. The brush contact drop is 0.5 V and rotational (mechanical) losses are 750 W Calculate The induced voltage The electromagnetic torque developed The shaft torque The overall efficiency B) (15...
4. A separately excited de generator is rated at 172 kW, 430 V, 400 A, and 1800 rpm. Its field circuit has a total resistance Radi +Rp. Its magnetizing curve is shown in Fig. P4.1. The machine has the following characteristics: RA = 0.05 2; Rr = 20 2; Radi (a) Draw the schematic diagram of the generator. (b) If the variable resistor Radi in this generator's field circuit is adjusted to 63 2 and the generator's =0 to 300...