17-11-2017, 01:19 PM
In electrical engineering, electrical machine is a general term for machines that use electromagnetic forces, such as electric motors, electric generators and others. They are electromechanical energy converters: an electric motor converts electricity into mechanical energy, while an electric generator converts mechanical energy into electricity. Moving parts in a machine can be rotating (rotating machines) or linear (linear machines). In addition to motors and generators, a third category often included are the transformers, which although they have no moving parts are also energy converters, changing the voltage level of an alternating current.
Electric machines, in the form of generators, produce virtually all electrical energy on Earth, and in the form of electric motors consume approximately 60% of all electrical energy produced. Electric machines were developed from the mid-nineteenth century and since then have been an ubiquitous component of infrastructure. Developing a more efficient electrical machine technology is crucial to any global conservation strategy, green energy or alternative energy.
Electric machines, in the form of generators, produce virtually all electrical energy on Earth, and in the form of electric motors consume approximately 60% of all electrical energy produced. Electric machines were developed from the mid-nineteenth century and since then have been an ubiquitous component of infrastructure. Developing a more efficient electrical machine technology is crucial to any global conservation strategy, green energy or alternative energy.