Product Description:

The PMA57R-00100-00 is a brushless servomotor manufactured by Pacific Scientific within the PMA Brushless Motors series. This rotary unit is intended for closed-loop industrial automation where precise torque and speed control are required to drive indexing tables, gantries, or packaging axes. The design combines a frameless permanent-magnet rotor with stator windings sized for medium-to-high power ranges, giving the motor a compact form for demanding motion systems. It is suited for applications where stable servo response and accurate positioning are required during repeated start-stop operation.

The motor delivers a continuous stall torque of 22.0 Nm, indicating the sustained mechanical load it can hold without exceeding thermal limits. For short acceleration bursts, it can reach a peak torque of 69.0 Nm, allowing fast cycle starts without oversizing the frame. A nominal stall current of 11.0 ARMS indicates the drive’s continuous current requirement, while the winding is intended for a supply range of 240-480 V AC to match common three-phase servo amplifiers. Dynamic response is supported by a rotor inertia of 4.21 kg·m² × 10⁻³, which helps balance responsive speed changes with stable motion under varying loads.

The housing forms a square that measures 142 mm across, simplifying mounting to metric or imperial plates. Overall mass is 19.0 kg, so moving-axis assemblies must account for the added load during support and motion control. The power connector exits in a right-angle orientation, which helps route cables in shallow enclosures or tight machine spaces, and the feedback device is a resolver that supplies analog sine-cosine signals to the controller. The unit ships without a brake, uses a smooth shaft for direct clamping couplings, accepts a 6-pin 6PP power plug, and carries a stack length code of 7 for its laminated core depth. These features support straightforward mechanical integration where compact cable routing and analog feedback are preferred.