Synchronising control for electric drive system - uses angular displacement switch as scanning element in each drive unit

摘要

Synchronising control for an electric drive system comprises a number of drive units, each with one motor and one scanning element and, in addition, a central control circuit is operative connection with all drive units. An angular-displacement switch acts as the scanning element in each drive unit which, whenever a rotating part of the drive unit reaches a predetermined tripping angle transmits an angular-displacement signal. The control circuit comprises for each drive unit a circuit breaker an operative connection with the associated angular-displacement switch. The control circuit furthermore includes for each drive unit a control stage operative connection with the associated angular-displacement switch and storing the corresponding angular-displacement signal. A reconnect trip is provided which is common to all drive units and which, in conjunction with all the control stages allocated to the various drive units, enables an AND operation to be performed.