Arrangement and method for detecting an electrical line interruption during operation of a drive system

Abstract

The invention relates to an arrangement for identifying an electrical line interruption during operation of a drive system (20), which comprises two parallel-connected DC motors (21, 41), which are mechanically coupled to one another by means of a part that is to be driven, a driver for driving the two parallel-connected DC motors (21, 41) and a measuring device for detecting different electrical variables of the drive system (20). The measuring device comprises a rotational speed determination apparatus (32) for determining the rotational speed of the two DC motors (21, 41) and for supplying a piece of rotational speed information representing the rotational speed. The measuring device further comprises a current measuring apparatus (27; 28) for determining a summation current flowing in the two DC motors (21, 41) and for supplying a piece of current information representing the summation current and a voltage determination apparatus (60; 61) for determining the terminal voltage of the two DC motors (21, 41) and for supplying a piece of voltage information representing the terminal voltage. A computation unit (70) is designed to ascertain a motor parameter (kω) for the drive system (20) from the voltage information, the current information and the rotational speed information and to compare said motor parameter with a setpoint value (kω_set) of the motor parameter (kω), wherein the presence of a line interruption to one of the two DC motors (21, 41) can be inferred from the result of the comparison.

Dependencies are inferred from the claim text.