Product Description:

The PMB33E-20116-00 is a brushless servomotor manufactured by Pacific Scientific and included in the PMB Brushless Servomotors series. As a permanent-magnet unit, it delivers closed-loop torque and velocity control for positioning axes, pick-and-place heads, and packaging spindles in industrial automation. The motor mates with electronic drives that supply sinusoidal current, and it reads commutation signals from an internal encoder to synchronize stator excitation with rotor position during startup and low-speed operation.

Within the motor frame classified as NEMA size 34, the housing accepts front-face mounting and keeps a 3.38-inch square flange for standard machine interfaces. The laminated core uses a stack length multiple of 3, which increases continuous torque without enlarging the footprint. When energized from 240 VAC drives, the phase windings can withstand a nominal stall current of 7.4 ARMS, so cabling and amplifiers must be sized accordingly. Power exits the stator through flying leads with AMP connectors, eliminating a terminal box and shortening the overall length. Rotor position and electronic commutation are supplied by a digital encoder with commutation, enabling startup without Hall sensors and supporting field-oriented control.

The feedback element resolves mechanical motion to 4096 ppr, giving drives 12-bit position data for tight velocity loops at low speed. Output torque reaches the load through a shaft machined with a square key, allowing couplings or pulleys to be locked without relying on friction fits. Because this is delivered as a standard motor, its mechanical dimensions and electrical pinouts follow the standard configuration used in the family. The model is identified as a PMB Series brushless servomotor and is intended for use with compatible Pacific Scientific drive amplifiers.