AX2001 by Beckhoff

Beckhoff's AX2001 is a single-axis servo inverter in the AX Digital Servo Drives series. The unit converts three-phase supply energy into controlled current for small and medium synchronous or induction motors used in pick-and-place stations, packaging lines, and general factory automation. Integrated signal conditioning lets the drive accept both differential step-and-direction commands and analog references, allowing a PLC or motion controller to control speed, torque, or position without additional converters. Built-in regeneration handles surplus kinetic energy within the specified power range.

The analog interface samples command signals with a 14-bit resolution, allowing fine torque or velocity increments. Each channel is refreshed every 62.5 µs, supporting tight control loops in high-speed machinery. The interface tolerates an input span of ±10 V across an impedance of 20 k?. Motor windings are driven with up to 3 A RMS during short acceleration bursts, while continuous operation is limited to 1.5 A RMS. The 1.01 output-current form factor helps keep copper losses low. The permissible load inductance ranges from 25 mH to 150 mH, allowing the same amplifier to work with compact servo motors or higher-inductance torque motors without instability.

Quiescent electronics consume 15 W, and losses rise to 30 W when the axis delivers its rated load of 1 kVA. During deceleration, the internal brake resistor can absorb 80 W continuously. A separate brake output supplies 2 A to operate the motor holding brake at standstill. The voltage drop between the DC link and motor terminals is limited to 5 V, helping the motor maintain torque at low speeds. The digital step-and-direction input accepts frequencies up to 1.5 MHz, allowing the AX2001 to track rapid command streams without missing pulses.