B&r Industrial Automation Gmbh

Bernecker + Rainer Industrie-elektronik Ges.m.b.h.

Bernecker + Rainer Industrie-elektronik Gesellschaft M.b.h.

Elmar Bohatsch

Johann Eder

Alois Holzleitner

Christian Schneider

Harald Unterberger

Engelbert Gruenbacher

August Huber

Bernd Lutz

Roland Scharinger

In order to reduce the cabling complexity of an electric motor having an encoder, an electric motor which can be connected to a control unit in order to receive an actuating signal from the control unit has an encoder port which is designed to receive an encoder signal from an encoder. Furthermore, the electric motor has a signal port which is designed to transmit the encoder signal to the control unit.

Arrangement of an electric motor having an encoder

To utilize and protect a mechanical load torque range of a servo drive in combination with a pump, a control unit is given a target system pressure as a reference variable and an actual system pressure as a control variable. An electric motor torque acting on a pump of the servo drive is specified by the control unit to an electric motor of the servo drive, a volume flow at the hydraulic load is generated by the pump, by which a mechanical load torque sets it at the electric motor and the actual system pressure is produced in the hydraulic load via the volume flow. A dynamic system variable of the hydraulic system is transmitted to the limiting unit. The limiting unit limits the motor torque transmitted by the control unit to the electric motor as a function of the value of the system variable.

Hydraulic system with servo drive and hydraulic load and control unit for the hydraulic system

The different electrical components and cables arranged in the B flange of an electric motor can be installed only with difficulties and are complicated and time-consuming due to the restricted space conditions in the B flange. In order to improve this, it is proposed to recess the B flange'sfront sidefacing away from the electric motorat least in sections with respect to an imaginary surface normal to the longitudinal axisof the electric motorin the direction toward the motor housing, and to shape the B flange cover'sfront face resting against the B flangein a mirror-inverted manner to thereby improve the accessibility to the inside of the B flange

Electric motor with integrated electrical components in the B flange

Growing community of inventors

Braunau am Inn, Austria

Elmar Bohatsch