Product Description:

The PMB33E-00200-02 is a brushless servomotor built by Pacific Scientific and belongs to the PMB Brushless Servomotors series. Designed for integration into precision machinery, the motor converts drive amplifier output into controlled rotary motion for indexing, conveying, or coordinated multi-axis work. It uses electronic commutation to produce continuous torque without brush wear, which helps reduce routine service needs in automated production equipment. This arrangement also supports smooth speed control and repeatable response during frequent starts, stops, and position changes.

Power and feedback conductors exit the housing through flying leads that terminate in separate MS connectors, allowing connection changes without opening the motor body. The frame conforms to NEMA Size 34, providing a 3.38-inch square face while preserving the mounting pilot used by older stepper installations. When energized by a 3-phase amplifier, the motor develops a nominal stall current of 7.4 ARMS at a line potential up to 240 VAC. The drive must supply that current under locked-rotor conditions without exceeding thermal limits. Rotor position feedback is delivered by a resolver, which maintains reliable feedback in electrically noisy and high-temperature environments and supports stable velocity control.

The electromagnetic package uses a stack length multiplier of 3, increasing available torque over shorter stacks without changing the mounting pattern. Thermal protection is provided by an embedded PTC thermistor that rises sharply in resistance as winding temperature approaches its limit, allowing protective shutdown before insulation damage occurs. Mechanical coupling to gearheads or pulleys is simplified by a flat shaft, which provides secure drive engagement without a keyed interface. The motor’s compact frame, onboard temperature monitoring, and resolver feedback make it suitable for precise duty cycles that require consistent motion and dependable thermal supervision.