Abstract The article proposes the main stages of compiling mathematical models for calculating and analyzing dynamic thermal modes asynchronous motors in systems an automated frequency electric drive are described. application maximum principle Newton-Raphson method is given, as well solution problem using principle, which leads to a doubling number differential equations. Under these condition...

This work is devoted to the automation of electric drive drilling rig winch. The technical characteristics and features winch are also considered. synthesis automatic control system was made, calculation parameters speed controller analysis dynamics were performed.