Product Description:

The PWM3636-5574-7 brushed DC motor is built by Pacific Scientific as part of the PWM Brushed Treadmill Motors series. It is intended to deliver controlled rotational power to treadmill drive systems and other automated machinery that rely on electronic speed regulation. Within industrial automation, the unit offers a compact source of torque for belt-driven axes that must maintain fixed speed under load while accepting rapid set-point changes from a drive controller.

The motor is designed for a supply of 135 VDC; this voltage matches common treadmill PWM drives and sets the electromagnetic flux level in the permanent-magnet field. Under that excitation, the armature draws up to 18.8 A, a figure that determines conductor sizing and drive output ratings. Its mechanical output is rated at 3950 RPM, providing high belt surface velocity when coupled through the integral flywheel. At that speed, the shaft delivers 2.75 HP, so the drive can sustain user weight or process load without stalling. Current is commutated through angled brushes, a configuration that increases brush contact area and reduces sparking at the stated rotational speed.

The continuous operating profile is supported by a continuous duty rating, meaning thermal equilibrium is reached without exceeding winding insulation limits during long workouts or production cycles. A permanent-magnet, or PM, field eliminates the need for separate field power and simplifies speed feedback because flux remains constant across load changes. The flywheel measures 7 in in diameter; its inertia smooths the instantaneous torque variations that arise from step frequency changes and improves ride-through when mains voltage dips momentarily. Because the motor type is DC, speed control is accomplished by varying average armature voltage through pulse-width modulation rather than by altering supply frequency, allowing fine resolution and quick acceleration in automated equipment.

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