PRD-B040ASIC-62 Kollmorgen
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The Kollmorgen PRD-B040ASIC-62 is a servo drive in the PD Servostar Servo Drives series featuring a SERCOS control interface and resolver feedback. It offers a peak output current of 18 Arms for 500 milliseconds with a rated output current of 6 Arms, and operates with a PWM frequency of 8 kHz. The unit uses external 24 VDC logic power and features protection thresholds for undervoltage at 90 VDC, overvoltage at 430 VDC, and overtemperature at 80 degrees Celsius.
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Product Description:
The PRD-B040ASIC-62 servo drive is manufactured by Kollmorgen for the PD Servostar Servo Drives series. Designed as a compact axis amplifier, it converts a fixed DC bus into phase-aligned pulses that control motor torque in automated machinery. By executing real-time current, velocity, and position loops inside the housing, the drive relieves the PLC of high-speed processing tasks and maintains consistent motion accuracy on conveyors, gantries, and tool heads.
The drive communicates with higher-level motion controllers through the SERCOS fiber-optic ring, so parameter downloads and synchronous setpoints reach the power stage with deterministic timing. Inside the unit, the current loop closes every 62.5 µs, allowing rapid suppression of ripple caused by back EMF. An external 24 VDC supply keeps the logic circuits active during main power outages, preserving fieldbus links and fault history. Continuous motor duty is supported by a rated phase output of 6 A rms, and closed-loop algorithms limit drift to 0.01% of the commanded speed over extended production runs. Position corrections refresh every 500 µs, while velocity adjustments refresh every 250 µs. Both corrections are generated from an 8 kHz pulse-width modulation signal that produces a sinusoidal drive waveform.
The commutation table operates at frequencies up to 400 Hz, providing adequate electrical frequency for high-speed, low-pole motors without loss of phase resolution. For transient demands, the inverter can deliver 12 A rms for two seconds or 18 A rms for 500 milliseconds, giving machinery additional thrust for acceleration and recovery from shock loads. Rotor position enters the control loops through a resolver, enabling absolute feedback even after a power cycle. Thermal sensors disable the power stage at 80 °C to prevent damage from excessive heat. DC-link monitoring triggers an overvoltage fault at 430 V and an undervoltage fault at 90 V. These protective thresholds prevent operation outside the permitted voltage and temperature ranges while allowing the control loops to maintain accurate commutation during normal service.
