Product Description:

The PMA54R-00100-00 brushless servomotor is manufactured by Pacific Scientific as part of the PMA Brushless Motors series. Designed for closed-loop industrial axes, the unit delivers controlled rotary motion to packaging, material-handling, and assembly equipment. Its resolver supplies rotor position feedback to the drive, and the smooth shaft supports precise coupling to reducers while avoiding the stress concentration associated with keyed shafts.

At the core of its performance envelope is a continuous stall torque of 13.5 Nm, which is the steady torque the motor can produce without overheating at zero speed. Current demand at that operating limit is 11.0 A RMS, so the selected drive must be able to supply that level of phase current during sustained holding conditions. The winding belongs to the 240–480 V AC voltage class, allowing the motor to operate on medium-voltage servo platforms without a step-down transformer. A motor body square of 142 mm sets the flange footprint and guides machine frame drilling patterns. Cabling exits through a right-angle connector, which helps reduce vertical clearance where space above the motor is limited.

For short acceleration periods, the motor can reach a peak torque of 41.0 Nm when the axis requires extra force for indexing or rapid speed changes. Dynamic behavior is also influenced by the rotor inertia of 2.49 × 10⁻³ kg·m², which gives the drive a moderate reflected load during tuning and speed transitions. Power conductors terminate on a 6-pin power plug, coded 6PP, so the power connection remains separate from the resolver feedback wiring. With a mass of 13.0 kg, the motor adds a manageable load to machine structures or moving axes. The motor is supplied without a brake, and stack length 4 is used for this build with no special design features listed.