SR3642-4822-7-56HC-CU Pacific Scientific
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The Pacific Scientific SR3642-4822-7-56HC-CU is part of the Permanent Magnet DC Motors series and weighs 27 pounds. It delivers 1/2 horsepower at a rated speed of 1750 RPM, with a continuous torque of 18.0 pound-inches and a continuous current of 4.7 Amps. The motor features a TENV enclosure, a NEMA 56C frame, and operates at 90 VDC.
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Product Description:
The SR3642-4822-7-56HC-CU is a permanent-magnet DC motor produced by Pacific Scientific for the Permanent Magnet DC Motors series. The unit serves as a compact prime mover in industrial automation, turning direct-current energy from a regenerative or SCR drive into controlled rotary motion. It can run conveyors, mixing barrels, or small web-handling sections where tight speed regulation and quick torque rise are required. Its permanent-magnet design also supports responsive speed control during frequent starts, stops, and load changes under a compatible DC drive.
At a rated armature supply of 90 VDC, the motor reaches a nominal speed of 1750 rpm, matching systems that require constant surface speed. Continuous operation yields 18.0 lb-in of torque while drawing 4.7 A, delivering 1/2 HP through a 56C face mount. Electrical losses are limited by an armature resistance of 0.9 Ω, and commutation dynamics are shaped by an inductance of 3.8 mH, giving predictable current rise for the drive regulator. Four 3/8-16 UNC-2B mounting holes in the face simplify rigid coupling to gearboxes, and a 0.6250 in. shaft accepts a 0.188 by 1.38 in. key. With an overall length of 12.10 in., the motor fits installations where cabinet depth is limited.
For overload events, the armature can withstand 74.0 A momentarily, providing rapid acceleration of inertial loads. A torque constant of 4.2 lb-in/A allows the controller to predict output torque directly from commanded current, which supports stable closed-loop response. The totally enclosed nonventilated housing carries the TENV designation, so external airflow is not required for cooling and contaminants cannot enter the frame. This arrangement is useful in enclosed machine areas where open-vented cooling would be less practical. Service weight is just 27 lb, easing installation above floor level and reducing the structural load on mounting surfaces.
Frequently Asked Questions about SR3642-4822-7-56HC-CU:
Q: What is the rated voltage of the SR3642-4822-7-56HC-CU DC motor?
A: The SR3642-4822-7-56HC-CU has a rated voltage of 90 VDC, ensuring compatibility with standard DC supply systems.
Q: What is the continuous torque rating of the SR3642-4822-7-56HC-CU?
A: This motor provides a continuous torque output of 18.0 lb-in, making it suitable for consistent, high-torque applications.
Q: What is the rated speed of the SR3642-4822-7-56HC-CU motor?
A: The rated speed of the SR3642-4822-7-56HC-CU is 1750 RPM, allowing for steady and controlled operation in various setups.
Q: What type of enclosure does the SR3642-4822-7-56HC-CU feature?
A: The SR3642-4822-7-56HC-CU uses a Totally Enclosed Non-Ventilated (TENV) enclosure, offering protection against dust and contaminants without active cooling.
Q: What NEMA frame size is the SR3642-4822-7-56HC-CU designed with?
A: It is built on a NEMA 56C frame, ensuring easy mounting and widespread compatibility with standard motor equipment.
