Patent investigation of a frequency-controlled asynchronous electric drive

Currently, the introduction of energy-saving equipment and technologies is a priority task in the Russian Federation. The efficiency of energy resources utilization in our country does not exceed 30%, i. e. about 2/3 of the supplied energy is lost in the process of its final use. The modern level of technology development allows to have a coefficient of useful use of energy resources not less than 50-60%, which allows to create favorable conditions for solving important resource-saving tasks of any production. One of the priority directions of energy saving in industry is the introduction of variable frequency drive. In the world practice regulated electric drive is recognized as one of the most effective energy-saving and resource-saving environmentally friendly technologies.