Product Description:

The PMA55S-10100-00 brushless servomotor is produced by Pacific Scientific and belongs to the PMA Brushless Motors series. Designed for precision industrial automation, it translates electrical energy into tightly regulated torque for positioning tables, feeders, and light-duty presses. Its resolver supplies rotor position feedback to the drive, and the absence of an internal brake lets external mechanics or drive torque handle hold-in-place demands while reducing motor length and mass.

It delivers a continuous stall torque of 17.0 Nm, allowing the shaft to resist steady loads while maintaining rated temperature rise. For rapid acceleration or transient disturbances, the motor can reach a peak of 51.5 Nm, providing additional torque during indexing or punch cycles. Dynamic response is aided by the rotor inertia of 3.06 × 10⁻³ kg·m², and this moderate value balances quick speed changes with stable regulation. Supplying that torque requires up to 22.0 ARMS at stall, so the selected drive must support this current without derating. The winding is built for a 240–480 V AC bus, enabling use on common three-phase plant power and permitting long cable runs with minimal voltage drop.

The square frame measures 142 mm across the body, matching NEMA size conversions and simplifying mounting to existing gearboxes or plates. Stack length code 5 indicates the deepest lamination stack offered in this frame, which contributes to the rated torque output. Combined with internal iron and copper, the assembly weighs 15.0 kg, a value that affects handling and reflected load inertia. Cabling exits through a right-angle power connector that follows the 6PP six-pin pattern, keeping the cable bundle low to the machine envelope. A closed keyway shaft with the fitted key transmits torque positively, and the motor uses the standard PMA construction.