Product Description:

The MAC025A-0-WS-4-E/040-A-0/WI651LV is an AC servo motor developed by Bosch Rexroth Indramat for the MAC AC Servo Motors series. The unit operates as a torque-controlled actuator in analog drive systems, transforming command voltages from velocity or current amplifiers into precise rotary movement for tooling, indexing tables, and material-handling equipment. Its compact stator layout and removable power connector support installation in automated machinery where space and accessible cable routing are important.

The stator uses the WS winding, which sets the phase resistance and inductance required for compatibility with MAC current controllers. Heat generated in the copper windings is removed by natural convection, so the motor does not require a fan or an external cooling circuit. The motor has a frame length of A, giving it a compact axial housing for installations with limited space. Its motor size of 025 provides a small mechanical envelope and low rotor inertia for rapid velocity changes. Power enters through a connector on side A, allowing the supply cable to run parallel to the motor shaft. This connector position also leaves clear access to the feedback connections at the opposite end of the housing.

The motor has no mechanical brake, so an external clamp or drive-generated torque must hold the axis when power is removed. Motion feedback combines tacho feedback with encoder data, allowing the controller to receive speed-proportional voltage and digital position information. The screwed-on sensor housing contains an incremental encoder with standard mounting, and its mounting pattern is compatible with corresponding MAC assemblies. The encoder provides position pulses that the connected controller can use for closed-loop motion regulation. The unit is classified as a motor for analog drives, with feedback scaling, Hall sequencing, and thermal sensor signals suited to conventional ±10 V controllers. These control signals allow the drive to regulate torque, speed, and position while responding to changing loads during machine operation.