ADP-055-18 Copley Controls
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The Copley Controls ADP-055-18 is part of the Accelnet CanOPEN Modules series and delivers a continuous output power of 0.32 kW with a peak output power of 0.92 kW. It supports a continuous current of 6 Adc, a peak current of 18 Adc, and operates with an HV input range from 20 to 55 Vdc. The drive features a current loop rate and PWM frequency of 15 kHz and includes an overtemperature trip at 70 degrees Celsius.
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Product Description:
The ADP-055-18 is a board-level servo drive produced by Copley Controls for the Accelnet CANopen Modules series. It interfaces with fieldbus motion controllers and converts their velocity, torque, or step commands into accurately regulated motor current, making it useful for distributed axes in packaging machines, gantries, or autonomous vehicles. By combining power stages, control logic, and diagnostics on one compact module, the drive removes the need for separate analog amplifiers and simplifies cabinet wiring in low-voltage automation.
The continuous output is rated at 0.32 kW, which the amplifier delivers by supplying up to 6 A DC of steady phase current through its H-bridge. For short acceleration bursts, a peak current of 18 A DC is available, increasing mechanical power to 0.92 kW for a one-second interval. The power stage draws from a DC bus that can range between 20 V and 55 V DC, allowing operation from battery packs or regulated supplies. A 2.5 kHz current-loop bandwidth, updated at a 15 kHz servo calculation rate, keeps torque-tracking errors low during fast motion profiles. The output transistors have 0.075 Ω of on-state resistance, limiting conduction losses and heat rise during continuous operation. These electrical characteristics allow the module to regulate motor current while responding quickly to changes in commanded torque or velocity.
Carrier switching occurs at a PWM frequency of 15 kHz, with a second-order ripple component centered on 30 kHz to push noise above the mechanical spectrum. The drive requires at least 200 µH of motor inductance so that current ripple stays within the controller’s regulation range. Step-and-direction inputs accept pulse trains up to 2 MHz, while the digital position loop closes at 3 kHz to refine final settling. Thermal protection disables the output when the heat sink reaches 70 °C, and an overtemperature flag is broadcast over the CAN network for coordinated shutdown. The current loop supports rapid command updates, while the position loop provides the slower correction needed to reduce residual positioning error. The thermal response protects the power stage when sustained current or inadequate cooling causes the module temperature to exceed its operating limit.
