Product Description:

Bosch Rexroth Indramat designed the MDD090B-N-020-N2M-110GA0 for use in tightly regulated positioning loops on machine tools, packaging lines, and other automated axes. As a member of the MDD Synchronous Motors series, this motor works with digital drive controllers in modular servo systems. Size code 090 and length code B indicate the mechanical envelope that fits established mounting patterns, while an integrated multi-turn absolute encoder provides position data without homing. That combination suits applications that need repeatable starts, stops, and position correction under changing loads. The motor is supplied without a blocking brake, and a shaft seal is fitted to help limit lubricant escape during continuous duty.

During operation, the motor supplies 7.2 Nm of continuous torque at standstill, so closed-loop drives can hold loads without additional clamping devices. When commanded speed reaches 2000 rpm, the stator frequency and rotor magnets remain synchronized, providing predictable velocity regulation. Mechanical alignment is simplified by a 110 mm centering diameter that seats the flange concentrically to the machine frame, and the rotor uses standard balancing to limit vibration over the full speed range. Power and feedback conductors exit on Side A, which helps simplify cable routing inside compact cabinets. This arrangement keeps the cable entry on one end of the motor, which can be useful where surrounding machine space is limited.

The electrical interface uses a keyed connector that mates directly with drive cables, and position data are transmitted through digital servo feedback (DSF), allowing the controller to modulate current in microseconds. The keyed interface also helps prevent incorrect cable orientation during installation. The motor has a plain shaft in a standard single-ended configuration, and the shaft end on side B is left unmachined to reduce overhung mass. The standard housing uses finned aluminum for convective cooling and is compatible with the motor’s rated thermal load. Its external fins promote passive heat dissipation during normal operation.