Discuss the advantage of electric vehicles

Q3) A 7.40 kW, 240-V shunt motor takes a line current of 4 A when running light. Calculate the efficiency as a motor when delivering full load output, if the armature and field resistance are 0.5 Q and 240 2 respectively. At what output power will the efficiency be maximum? Is it possible to obtain this output from the machine?

Write a technical manual/ documentation, that will inform others of the efficiency and inefficiency of all types of motor and generator (ac and dc). Explore how any apparent inefficiencies could be improved. Show examples of these machines and using suitable examples, point out the areas of inefficiency (if applicable) and where and how things can be improved.   Then provide the solution to the following as an example in your report. A 2-pole, single-phase alternator driven at 3000rpm require a mechanical input to its rotor of 30kW when it is delivering its full-load output of 30kW. Under this condition the fixed and variable losses are1100W and 2.8kW respectively, and the rotor field winding is supplied from a 110V dc source. Given that the full-load efficiency is 87%, determine. the frequency generated, the input driving torque on full-load and the rotor field current

What role do power electronics play in electric vehicle design, and how are they used to control motor and battery performance?

A 25kW, 120V separately excited dc machine has an armature resistance of  Ra =0.025 ohms. When operated with a constant field current and constant speed of 2500rpm, the open circuit armature voltage is 120V. If the dc machine is connected to a 125V supply, determine                                             (i)Whether the dc machine is operating as a generator or a motor.                   (ii)The armature current     (iii)The supply power   (iv)The developed power.     (v)The developed torque.

Consider a simple ionic drive. If the drive field is 10,000V/m what is the force on the spacecraft from a singly ionized charge being accelerated.