SR Synchronous Servo Motors

Indramat SR Synchronous Servo Motors are permanently excited brushless servo motors designed for use with the fully digital Servodyn-D inverter system.

The SR series uses a sinusoidal e.m.f. design and includes an integrated resolver for commutation, speed feedback, and position control. Two NTC thermistors are built into the motor for temperature monitoring during operation. These motors use a compact flange-mounted design with smooth aluminum housings, plug-in connections for power and feedback, and installation pockets along the motor body for machine integration. The series provides IP67 protection except at the output side and is designed for natural convection cooling. Available options include holding brakes, keyed shaft versions, and an electronic rating plate that allows automatic inverter adaptation. SR motors can be installed in IM B5, IM V1, or IM V3 mounting positions when the required operating conditions are met, making them suitable for high-response servo applications that need compact construction, resolver feedback, and Servodyn-D drive compatibility.