Product Description:

The PMB33C-10214-02 is a brushless servomotor manufactured by Pacific Scientific for the PMB Brushless Servomotors series. It functions as the torque source in closed-loop industrial axes, converting three-phase drive current into precise angular motion for feeders, actuated valves, and small palletizers. By integrating rotor position feedback and temperature monitoring inside a compact housing, the motor reduces the external components normally required to build a responsive, protected servo station. This configuration suits compact servo installations where feedback and thermal protection need to fit in limited machine space.

The mechanical form factor follows the NEMA Size 34 frame, giving a 3.4-inch square flange that mates with common gearboxes and slide mounts. A laminated core arranged in stack length 3 increases active iron and raises continuous torque without enlarging the footprint. A smooth round shaft supports clamp or set-screw couplings with minimal runout. All power, feedback, and thermal leads terminate as flying leads with MS connectors, so installation only requires mating circular plugs. The lead style also avoids a fixed terminal box, which can simplify cable routing in tight enclosures. At locked rotor, the windings draw 3.8 ARMS from a 240 VAC bus, and this value helps verify that amplifier peak ratings and wiring remain within allowable temperatures.

Motion integrity is maintained by an incremental encoder that resolves 2048 ppr, giving positional granularity of less than 0.2 degrees per edge at the shaft. The same device includes digital encoder with commutation tracks that supply three digital phase signals, enabling the amplifier to align stator fields immediately after startup and maintain smooth sinusoidal control at every speed. Because commutation signals are integrated with the feedback device, the drive receives both position data and phase reference information through the same motor assembly. A factory-installed PTC thermistor sits within the windings; when its resistance rises sharply near the design temperature, the drive can derate or shut down to prevent insulation fatigue. This arrangement reduces the need for separate external feedback and winding protection devices.