Product Description:

The PMB33C-20116-02 is a brushless servomotor manufactured by Pacific Scientific within the PMB Brushless Servomotors series. Designed for closed-loop motion axes in industrial automation, the unit converts electrical input from a matching servo drive into controlled mechanical rotation and torque, enabling precise positioning of gantries, feeders, and indexing tables. By integrating electronic commutation with permanent-magnet construction, the motor delivers consistent speed regulation and rapid reversal without requiring external gearing or clutching hardware. This supports indexing duties that require quick starts, controlled stops, and repeatable bidirectional motion.

The nominal stall current at 240 VAC tops out at 3.8 ARMS, so the companion drive must supply that continuous phase current without entering foldback protection. Physical mounting aligns with the widely used NEMA Size 34 frame, letting the housing bolt to standard motor plates while maintaining shaft height consistency across machines. Power and feedback wiring exit the frame through flying leads with AMP connectors. This avoids proprietary plugs and keeps installation straightforward. Rotor position and commutation data come from a digital encoder with commutation, permitting direct sinusoidal current control and supporting accurate rotor phasing during startup.

Position accuracy is improved by the encoder's 4096 ppr resolution, giving the control loop fine incremental feedback for smooth velocity profiling. Thermal safeguarding is provided by an integral PTC thermistor, and the drive can monitor its resistance to limit current when winding temperature rises. This helps reduce the risk of excess heat affecting insulation and magnetic performance. Output torque is transmitted by a shaft machined with a square key, and a stack length multiple of 3 uses three laminated stator stacks to increase continuous torque density within the same frame.