Introduction to Electrical Machines:
Electric Generator Diagram : Electric Generator Diagram – Electricity does not occur naturally in usable form and it also cannot be stored in usefully large quantities. Therefore, it must be generated continuously to meet the demand (of power) at all times. An efficient and convenient way to generate electric power is by conversion of mechanical power into electrical form in a Rotating device called a generator. In the process a small part of power is lost in the generator (efficiencies in large generators are above 90%). The mechanical power is itself obtained from heat power by thermodynamical means in a steam turbine (efficiency …
Recent Trends in Electric Machines : Recent Trends in Electric Machines are neural networks, Artificial Intelligence, expert system, fibre communications and integrated electronics, hot superconductors and other new ceramic conducting and dielectric materials, magnetic levitation etc. should help young electrical engineers to develop newer, cheaper and more effective electrical energy converters and their controllers. Among all the various forms of energy systems, electrical energy offers the most flexible, economic and efficient mode for generation, transmission and utilization and has become the backbone of modem civilization. It provides for lighting, heating, transportation, communications and practically all industrial processes. Most of the power required for human …
Types of Rotating Electric Machine : The Types of Rotating Electric Machine are namely the dc machine, the polyphase synchronous machine (ac), and the polyphase induction machine (ac). Three materials are mainly used in machine manufacture; steel to conduct magnetic flux, copper (or aluminium) to conduct electric current and insulation to insulate the voltage induced in conductors confining currents to them. Types of Rotating Electric Machine comprise of two parts: the cylindrical rotating member called the rotor and the annular stationary member called the stator with the intervening air-gap as illustrated in Fig. 1.4. The rotor has an axial shaft which is carried on bearings at each …