Electromechanics is a science which study the mutual conversion of electrical and mechanical power and also the conversion of electrical power with one parameters into electrical power with other parameters. The most well known electromechanical converters are transformers and electric machines (electric motors and generators). Without such electromechanical devices no one aspect of human life could be succesfull.
Electrical energy is a main type of energy, whithout which one could not imagine our life. Almost all of the elctrical power on Earth is developed by electric generators and later the most part of this power is converted by electric motors back to mechanical power. Thansformers are used for increasing and decreasing of AC voltage. Electric machines determine the technical level of industry in many ways.