The magnetization curve for a separately excited DC generator is shown in Figu (c) (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field cin rated at 5 A. The following data are known about the machine: Vr = 130 V Rf = 20 N RA = 0.18 N Radj = 0 to 40 N Np = 1000 turns per pole Answer the following questions about this generator, assuming no armature reae (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 V. 150- 140 130 120 100 90 80 70 60 50 40 30 20 10 Shunt field current, A 1000 2000 3000 4000 5000 6000 7000 Field mmf, A turns Terminal nd generated voltage, V

Here it is the equivalent circuit of and induction motor and it is per phase circuit my question is name for me the variable for example R1 is the winding resistance and so an the all variable and please show me a pic of the real machine with the variable for example for R1 happens because of the winding i need to see the winding in the real machine, please help me to understand well

10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A. What will be the temperature of the winding when current has fallen to 3.91 A applied voltage being constant. Assume temperature coefficient at 15'C is equal to 1/254.5 per °C

The current generated by the waterwheel generator changes direction as the wheel rotates, that is, it is an alternating current.  Could you design a simple generator like this that would induce a current that continuously flowed in one direction (a DC current)?  If not, explain why not.  If so, describe and sketch your model solution below.

The armature of a two-pole generator is rotating at 3600 r/min. The armature has a simplex lap winding with a total of 1504 conductors. Determine the generated voltage when the flux per pole is 600,000 x 10-8 Wb. 5.5

× 4:03 K s.eng.ruh.ac.lk □ Û 8. Figure 4 shows the core of a simple dc motor. The magnetization curve for the metal in this core is given by Figure 5 and Figure 6. Assume that the cross-sectional area of each air gap is 18 cm² and that the width of each air gap is 0.05 cm. The effective diameter of the rotor core is 4 cm. L It is desired to build a machine with as great a flux density as possible while avoiding excessive saturation in the core. What would be a reasonable maximum flux density for this core? ii. What would be the total flux in the core at the flux density of part (i)? iii. The maximum possible field current for this machine is I A. Select a reasonable number of turns of wire to provide the desired flux density while not exceeding the maximum available current. Flux Density, B (T) 2.8 སྤྲ ཤཱ ཀ ཀཱ བྷ ཀ ཡཱཾ བ ་ 1.2 1.0 0.4 0.2 4-48cm Figure 4 0 10 20 30 40 50 100 → Depth 4 cm -0.05 cm 200 300 500 1000 2000 Magnetizing Intensity, H (A.turns/m) Figure 5 Magnetization curve…

Please solve thiss questionnnnn

Fundamentals of Energy Systems HW 4 Q6

A four pole machines generates 250V when operated at 1500 rpm. If the flux per pole is 1.85 x 106 maxwell, the number of armature slots is 45 and the armature winding has two parallel paths. If the speed of the generator is reduced to 1350 rpm, what would be the generated voltage. To what value of flux per pole should the excitation be adjusted if the generated voltage is to remain the same at 250V