Product Description

The SD-B4.140.020-05.000 permanent-field servomotor by Bosch Rexroth has an electronic PC board for conditioning its tacho and commutation signals. This motor should not be disassembled other than for the purpose of replacing the connectors and the tacho board. The product has a mass of 38 kg. This device is supposed to be connected only with special cables approved by the manufacturer. The unit does not support trailing cable operation for its tacho cable. It comprises a flange that is designed as per IEC 72-2 / DIN 42948 specifications. This motor has fixed ball bearings at its driving end.

The product incorporates a NTC thermostat that is evaluated by the connected inverter. This device is not intended to be mounted vertically with the shaft facing downwards. The unit uses the brushless tacho to determine the position of its rotor and to deliver velocity feedback. It encompasses permanent magnets designed using ferrite materials for the construction of the rotor. This motor related connections can be established only after ensuring that it is disconnected from the power supply.

The product has a peak torque that is thrice the nominal torque rating. This device portrays a special magnet configuration. The unit has a fully sealed construction. It is equipped with three phases. Its stator winding has low thermal resistance when compared to the motor surface. This servomotor has an electrical time constant of 11 ms at 20 °C. The product portrays a speed reference number of 020. This device is a standard motor without any customization. The unit uses right-angled or straight power and tacho plugs.