Product Description:

The PMA43N-01100-00 brushless servo motor is manufactured by Pacific Scientific as part of the PMA Brushless Motors series. Designed for closed-loop positioning duty in industrial machinery, it converts drive output into controlled rotational motion so packaging lines, dispensers, or gantry axes can move with repeatable accuracy. Its medium-frame construction allows integration into systems that require moderate torque without excessive footprint.

It delivers a continuous stall torque of 6.1 Nm, allowing the shaft to hold that load indefinitely without breaching thermal limits. During short accelerations it can reach a peak torque of 21.7 Nm, providing headroom for overcoming static friction or sudden load changes. The copper windings draw a nominal stall current of 3.8 ARMS, a figure the servo amplifier must supply while maintaining phase symmetry. Those windings are built for the 240-480 V AC voltage class, so the motor pairs with common medium-voltage drives for worldwide plant power grids. Dynamic response is influenced by a rotor inertia of 0.52 kg·m² × 10⁻³, balancing the need for rapid speed changes with smooth control loop stability. Together these electrical parameters define the thermal and dynamic envelope the application engineer must observe.

The square aluminum housing measures 115 mm on each side, corresponds to stack length 3, and brings the assembled unit weight to 7.6 kg. A factory-installed 24 V brake locks the smooth shaft when the drive is disabled, preventing back-driving on vertical axes and meeting safety holding requirements. Power enters through a 6PP 6-pin connector that exits the frame at a right angle, while a separate right-angle feedback port carries resolver signals to the controller. The resolver supplies absolute rotor position over the full speed range, and the absence of special design features simplifies maintenance and stocking of replacement units.