Electrical energy does have an overriding advantage in the sense that it can be transmitted and controlled more easily
than most forms of energy. Electricity is most often generated in large installations, transformed to appropriate voltage in
units called transformers and carried overland for various distances. Then it is usually retransformed to lower voltages and
finally converted to whatever form required.
Devices that receive mechanical input energy and convert it to electrical energy, and those devices that receive electrical energy and convert it to appropriate mechanical force or motion are called electromechanical devices.These broad fields of energy conversion are handled at the mechanical-to-electrical end by generators and at the electrical-to-mechanical end by motors.
A major reason that these devices are so very widely used is that they are relatively efficient and controllable; so much
so that our entire industrialized civilization is inseparably involved with their use. This free ebook will teach you a lot You need to know about Electrical machines and measurements.
