Automation of the drive G-D mine hoist and excavators is closely related to the use of electromachine amplifiers in it - special electrical machines with a high gain and high speed. These qualities of electromachine amplifiers have determined their widespread use and contributed to the development of various control schemes built on a closed loop.However, the experience of operation and research drives G-D mine hoisting and excavators with electromachine control show that the systems with electromachine amplifiers are very complex, transients in them have unfavorable character, in general, the operation of drives is not characterized by reliability and stability.