Product Description:

Pacific Scientific manufactures the PMA57R-01100-00 in the PMA Brushless Motors series. The unit is categorized as a brushless servomotor intended for closed-loop industrial axes that benefit from sustained torque and high peak capability. It converts electrical power into rotary motion and integrates naturally into systems that use resolver feedback and AC servo drives.

At rated conditions, the motor can maintain a continuous stall torque of 22.0 Nm, providing the holding or low-speed driving force required for tensioning or indexing duties without overheating. For dynamic events such as acceleration, it can reach 69.0 Nm of peak torque, giving a more than three-to-one reserve above the steady-state level. The copper windings draw a nominal stall current of 11.0 ARMS, which indicates the inverter current rating needed for continuous operation. Those windings are designed for a 240–480 V AC supply class, so the same frame can be powered from either 240 V or 480 V three-phase systems. A rotor inertia of 4.21 × 10⁻³ kg·m² balances quick speed changes with load matching, and the 142 mm square body with stack length code 7 establishes the mechanical envelope. A smooth shaft simplifies coupling, and resolver feedback allows the controller to maintain precise position loops even at low speed.

Additional attributes focus on installation and axis holding rather than output performance. A 24 V spring-applied brake is mounted at the rear to hold the axis when power is off. Power and feedback cabling exit through a right-angle connector arrangement, and the power leads use the 6PP six-pin format used on medium-current motors. With a mass of 19.0 kg, the assembly supports mounting on vertical plates without auxiliary supports while remaining manageable during installation. The motor follows the standard PMA frame geometry used across the series.