Product Description:

The PWM3624-5579-7-1 direct-current motor is manufactured by Pacific Scientific as part of the PWM Brushed Treadmill Motors series. It supplies regulated mechanical power for driven treadmill decks, light conveyors, and other speed-controlled loads in industrial automation. Its permanent-magnet field, polyester-impregnated armature, and large sealed bearings are combined to meet continuous duty cycles. Its pulse-width-modulated supply interface lets integrators vary speed without significant torque loss, while a rugged fused commutator withstands repeated high-current reversals.

This model is rated for operation from 120 VDC supplies and draws 20.9 A of armature current under full load, indicating the drive electronics must deliver steady low-ripple power to avoid brush sparking. At a base speed of 4000 RPM, the motor can deliver up to 3.0 HP when used with its external muffin fan. The forced airflow keeps winding temperature within limits during continuous duty. The totally enclosed fan-cooled housing carries a TEFC enclosure classification, so airborne dust from belt wear or facility debris cannot enter the frame. A polyester-impregnated armature, large sealed bearings, and constant-force brush springs further support long service life under cyclic acceleration.

When the auxiliary fan is not present, mechanical output falls to 2.75 HP, a figure that reflects the thermal margin available from natural convection alone. Torque is produced by a permanent-magnet field anchored on an anti-cog design, minimizing speed ripple at low velocities important for treadmill feedback loops. Stopping energy is absorbed through dynamic braking, enabling quick belt deceleration without relying on external clamps. The CONT duty rating is sustained at ambient temperatures up to 40 °C, and reliability is reinforced by a rugged fused commutator that alleviates arc damage during overload events.