Product Description:

The SR3632-8292-7-56HC is a brush-type permanent-magnet DC unit produced by Pacific Scientific for the Permanent Magnet DC Motors series. Within an automation cell, it couples to gear reducers, conveyors, or small winding stations to provide adjustable rotary motion controlled by a matched DC drive. Because the magnetic field is supplied by permanent magnets, the motor avoids separate field excitation and lowers overall power consumption in continuous-duty equipment.

It operates from a rated supply of 90 VDC, which is the nominal armature voltage for steady-state operation under load. At that voltage, the drive produces 1/3 HP of mechanical output while maintaining a shaft speed of 1750 RPM, a common base speed for belt-driven machinery. Continuous conduction is supported at 3.5 A armature current, and at this level the motor generates 12.0 lb-in of torque for continuous duty within the thermal limits of its Totally Enclosed, Non-Ventilated housing. The SCR-rated commutation design matches phase-controlled rectifier drives, while a resistance of 1.8 Ω across the armature windings limits inrush current and supports stable current regulation.

When rapid acceleration is required, the motor can accept 71.0 A for short intervals, allowing high breakaway torque before returning to continuous conditions. Torque rises in direct proportion to current because the electromagnetic constant is 3.9 lb-in/A, so control loops can predict output with simple linear scaling. The armature’s electrical dynamics are shaped by an inductance of 6.6 mH, which filters the current pulses inherent in phase-angle controllers. On the mechanical side, a rotor inertia of 5.0 lb-in² moderates speed changes, reducing overshoot in position-regulated axes while keeping response time acceptable in typical conveyor or indexing applications.