The armature of a 6-pole separately excited dc
generator is
lap wound with 534 conductors. This machine delivers power
to the load at 250V while being driven at 1000 rpm. At this
load, the armature circuit dissipates 640W. If the flux per
pole
of this generator is 30-mWb, determine the kW rating of the
load served.Assume a total brush contact drop of 2V.
The armature of a 6-pole separately excited dc generator is lap wound with 534 conductors. This...
A 4-pole, lap wound, d.c machine has total number of 800 armature conductors and produces 0.03 Wb flux per pole when field is excited. If the machine is driven by a prime mover at 1000 rpm, calculate the generated emf across the armature. If the generator is loaded to deliver an armature current of 50 A, Calculate the prime mover and electromagnetic torques developed at this load current. Neglect frictional torque.
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? ...
A-4 pole, lap-wound, long shunt, dc compound generator has useful flux per pole of 0.07 Wb. The armature winding consists of 220 turns and the resistance per turns is 0.004 Ω. Calculate the terminal voltage if the resistance of the shunt and series field are 100 Ω and 0.02 Ω respectively; when the generator is running at 900 rpm with armature current 50 A. Also calculate the output power in kW for the generator.
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...
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?
A4-pole, 500V DC separately excited generator is running at a speed of 450 rpm. Its field and armature resistances are 35 and 0.007 ohms respectively. If the generator is supplying a 750 kW load and the rotational power loss is 12180 W, find: a) The armature induced voltage, b) The input power
Question (2) A 4-Pole, 220 V shunt motor has 540 lap-wound conductors. It takes 32 A supply main and develops output power of 5.595 kW. Shunt field and armature resistance are 2202 and 0.092 respectively and flux per pole is 30 mWb. Calculate () the speed (ii) Calculate starting current (i) Calculate current flowing through armature at speed of 500 rpm (v) Shaft torque at speed calculated in (1)
An eight-pole 500 V, 500 kW dc generator has a lap winding with 640 armature conductors. If the generator has six commutating poles, determine the following: (a) The number of turns in the commutating winding if the mmf of the commutating poles is 1.8 times that of the armature (b) The number of conductors for the compensating winding in each pole face if the generator has a compensating winding and the pole face covers 80% of the pole span (c)...