Contact thyristor control of reversible asynchronous electric drive

Abstract

The control circuit of the reversible asynchronous electric drive is considered, which allows to increase the permissible number of reverses and increase the service life of the switching equipment. The drive uses capacitor-countercurrent braking and switching of reversible magnet starters in the current-free pause created by the thyristor switch. The oscillograms of the start and reverse of the engine are given. A method is proposed for calculating the permissible number of reverses of an induction motor operating in capacitor-countercurrent braking mode.\