3-what the meaning of pull-down resistance? And what is the benefits of using the pull-down resistance?

Q2/ A 3 phase, 0.8MVA, 3.3kV, 50Hz, SG its armature winding star connected and its iron and mechanical losses are 20kW, having 0.502/phase armature resistance when a 150V is applied to the excitation winding 1-100A at UPF and I, 120A at 0.8 lagging power factor. Find the efficiency at both case

b) Derive the governing equation for the system shown in figure (b) using grounded chair representation. Page 1 of 3 Force Fin

A 20 kW shunt machine having an Armature circuit Resistance of 0.5 N and a filed resistance of 1200, generates a terminal voltage of 240 V at full load. Find the Efficiency When act as a Generator at full load and act as a Generator at half load and act as a Motor Assume the Iron, Friction and Windage losses are 0.8 kW. I need all clear steps Please clear write

Please show the steps

43. The motor whose torque versus speed characteristics are shown in Figure P2.29 moves the load seen in the diagram. Some of the gears have inertia. Find the transfer function, G(s) = θ₂(s)/Ea(s).

A250 V, dc shunt motar has an armeture resistance of 0.5 chmand a field resistance of 250 chm When driving a load of constant torque at 600 r.pm, the amature current is 20 A If it is desired to raise the speed from600 to 800 r.pm, what resistance should be inserted in the shunt field circut? Assume that the megnetic circut is unsaturated

Explain what a Joint movement is. Why would you use a joint movement versus a Linear or straight line movement? for implementation of robot systems

I need the answer as soon as possible

1. (a) The arm of a starter is held in the “ON” position by means of an electromagnet. The torqueexerted by the spring is 5 Nm and the effective radius at which the force is exerted is 10 cm.Area of each pole face is 2.5 cm2and each air gap is 0.4 mm. Find the minimum number ofampere-turns (AT) required to keep the arm in the “ON” position. (b) Explain with the help of diagram, energy and coenergy in electromechanical energyconversion.