No abstract

Qualitative needs, ever higher, automatic control systems, correlated with the development of power electronics, microprocessors, programming techniques, development of unconventional energy production, resulting in bringing to the fore the three-phase power converters. Using asynchronous motor, the simplest and robust electric car, often can not meet the quality conditions of the machine working. AC machines can not achieve a wide range of speeds and a hub can not cover 250-300% overload.Widespread use in electric drive systems that we obtained semiconductor electronic control methods with techniques for high efficiency and precision control very good. Static converters have become easy to use and virtually through them obtain any desired mechanical characteristic for any type of electric machine.

Abstract-Evolution