Product Description:

The SR3642-4982-84-7-56HC-CU is a permanent-magnet DC motor produced by Kollmorgen within the SR and SRF Permanent Magnet Motors series. Classified as a totally enclosed, nonventilated motor rated for use with a silicon-controlled rectifier, it is intended for continuous operation on precision conveyors, metering pumps, and other industrial axes where compact speed control is required. In an automation cell, the motor converts regulated DC input into steady rotary motion, allowing a compatible drive to maintain the commanded velocity without the airflow requirements associated with an open-frame design.

The motor sustains a shaft load with a continuous torque of 18.0 lb-in while drawing a continuous armature current of 2.6 A. These values establish the steady operating point after the winding temperature has stabilized under a constant load. The rated speed is 1750 rpm, allowing the connected drive to provide a controlled speed-torque response over the permissible load range. A rated supply of 180 VDC supports full output without field weakening. The continuous torque, armature current, rated speed, and supply voltage can be used to select suitable gearing and feedback components without exceeding the motor’s thermal limits.

The motor has an output rating of 0.5 HP, providing a direct comparison with fractional-horsepower gearmotors used in similar machinery. During acceleration, the armature can handle a peak current of 40.0 A for momentary overloads that occur when moving high-inertia loads. The torque constant is 7.6 lb-in/A, linking the controller’s commanded armature current to the torque delivered at the shaft. An armature inductance of 16.2 mH moderates current ripple from silicon-controlled rectifier drives and helps reduce brush arcing during commutation. The armature resistance is 3.3 Ω, which affects the initial startup current and contributes to copper losses as current passes through the winding.