Q.1- The water level, h (t), is controlled by an open -loop system as shown in figure below. A dc motor controlled by an armature current ¡ turns a shaft,opening a valve. The inductance of dc motor is negligible,that is, L₁ = 0.Also the rotation friction of the motor shaft and valve is negligible .That is, C = 0,The height of the water in the tank is h(t) = § (1.60(1) – h(t))dt . The motor constant is K =10, the inertia of the motor shaft and valve is J=6x10³ Kg.m² and back e.m.f constant K, = 0.0706V/(rad/s). Determine i-The deferential equation for h(t) and V(t). ii-The transfer function H(s)/V(s). Amplifier 4 - 50 100 Valve (1) 61)

This question is about d.c. machinesa)Explain briefly why the terminal voltage of a d.c. machine is not equal to thegenerated or back emf except at no load when V = E.b)Hence, state the relationship between V, E, the armature current and resistance thatapplies at normal loads for a generator.c)A 250 V shunt motor has an armature resistance of 0.4 Ω and runs at a speed of 750 rev min –1 when taking a full load current of 25 A.i)Estimate the speed of the motor at no load when the armature current is 3 A, assuming that the flux per pole remains constant.ii)Derive the relationship between speed, emf, and flux.iii)Calculate the field current for a field resistance of 110 Ω, if the load torque remains constant;iv)calculate the new armature current if the speed is increased to 1000 rev min –1v)Hence, find the value of the additional resistance required in the field circuit to maintain this current d)If the field current of a shunt wound d.c. motor is halved, what effect will thishave on the…

We are studying the use of a permanent magnet DC motor in a roller motion application. The motor has a voltage Vk, an armature resistance Ra, and when it turns a cylindrical roller (load) at n revolutions, it draws a current ia. The torque required by the load is proportional to the angular velocity ω with a proportionality coefficient Kφ. All losses except for ohmic are negligible. ia = 19A, Vk = 230V, n = 380, Ra = 4.5.calculate the mechanical torque delivered to the load (roller),

I need a clear expert solution, preferably a concise answer supported by the law. a. What is the principle of DC Generators that converts mechanical motion to electrical power? b. Which rule should you use to determine the direction of induced emf across a coil? c. What is the purpose of the commutator? d. Why there is no induced emf across a rotating coil when it passes through the neutral plane? e. What is the component causing a generator to produce de voltage rather than ac voltage at its output terminals? f. At what point should brush contact change from one commutator segment to the next one? j. how many pulsations per revolution should an elementary, single coil, de generator have with output voltage? h. How many commutator segments are required in a two-coil generator? q. How can field strength be varied in a practical de generator? n. What causes sparking between the brushes and the commutator? m. What is armature reaction? 1. What is the purpose of interpoles? p. What is the…