Product Description:

The SO-4008-0000 is a compact brushless servo drive manufactured by Kollmorgen within the Silverline Brushless Servo Drives series. It regulates motor torque and velocity in automated machinery by converting low-voltage bus power into precisely timed phase currents. This control supports stable, repeatable motion in semiconductor handling stages, small gantries, and other applications that require responsive axis movement. The compact enclosure also allows the unit to fit on crowded backplates alongside power supplies, controllers, and related motion modules.

The drive accepts a DC input and protects the bus with an overvoltage trip at 41 VDC. During normal operation, it provides a continuous output current of 8 ADC, while acceleration and other short-duration demands can draw up to 16 ADC for two seconds. Output current is pulse-width modulated at 18 kHz, which reduces audible switching noise and limits current ripple in the motor windings. The current loop operates with a bandwidth of 2.5 kHz, allowing the controller to respond quickly when the mechanical load changes. The unit operates in current mode, enabling an external speed or position regulator to command motor torque directly. A minimum motor inductance of 250 µH is required to keep the current rate of change within the power stage limits.

Control wiring enters through a face connector that accepts a differential command signal of ±10 V. Three motor leads are energized in sequence through six-step electronic commutation, providing the phase timing required by a compatible brushless servomotor. The aluminum housing measures 8.00 inches long, 4.00 inches wide, and 2.31 inches deep, while its tallest point measures 1.96 inches. These dimensions permit installation where backplate area and cabinet depth are limited. The DC input architecture allows the drive to receive power from an external low-voltage bus rather than directly from an AC line. Its current-mode operation leaves the outer velocity or position loop in the host controller, while the internal current regulator manages rapid torque response at the motor.