Product Description:

The AMP-055-18 is a DC servo drive module produced by Copley Controls for the Accelnet CANopen Modules series. It converts low-voltage bus power into modulated current for brushless or brushed motors while exchanging motion commands and diagnostics over the CANopen fieldbus. Packaged in a 196.3 mm × 99.1 mm × 29.7 mm housing, the unit is intended for space-constrained axes in mobile robots, pick-and-place tools, and other distributed automation systems where tight electronic integration is required.

The module has a maximum bus voltage of 55 V DC and a minimum bus voltage of 20 V DC, allowing operation from regulated supplies or battery strings without additional conversion. During rapid acceleration, the amplifier can deliver a peak output of 18 A DC for one second, while continuous current is limited to 6 A DC to maintain safe junction temperatures. The output impedance is 0.075 Ω, so most of the bus energy reaches the motor instead of being lost as heat. A required 200 µH load inductance protects the H-bridge from current spikes. Switching occurs at a 15 kHz carrier frequency with a 30 kHz ripple component to minimize audible noise and torque ripple.

An analog command converter with 12-bit resolution enables precise torque or velocity setpoints. The module provides 11 optically isolated inputs for limit switches, homing sensors, and user events. Its pulse-width modulation frequency helps reduce audible motor noise when the drive is mounted near operating personnel or sensitive equipment. The module weighs only 0.43 kg, making it practical for lightweight carriages, articulated arms, and mobile platforms where added mass can affect acceleration and positioning. Its compact housing also allows the drive to be installed close to the motor, which can shorten power wiring and simplify integration within distributed motion systems.