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Article | December 20, 2013
Aerotech: High-power modular drive chassis in 19-in. rack-mount design
Aerotech’s Npaq 6U high-power drive rack uses plug-in amplifiers supporting both linear and PWM topologies to control brushless, DC brush, or stepper motors.
PWM amps provide up to 320 VDC operating voltage and 30 A peak current capability. Linear amplifiers provide up to 80 V and 20 A peak current for high power, low-noise applications.
Featuring high-performance, double-precision DSPs, the Npaq 6U performs both current loop and servo-loop closures digitally to help ensure positioning accuracy and rate stability. This processing capability allows the Npaq 6U to provide loop closure rates up to 20 kHz and to handle both digital and analog I/O processing, data collection, laser firing, and encoder multiplication tasks in real time.
Standard options include integrated encoder multiplication, per-axis brake control logic, I/O expansion, and integrated emergency stop circuitry. The Npaq 6U contains two configurable power supply sections rated at 600 W each to support a variety of motors with different operating voltages. When only one motor voltage is required, the power supply sections are joined together for even higher power capability. The Npaq 6U has a dedicated Ethernet port to communicate with third-party I/O modules for increased I/O count applications. It supports up to three axes of Position Synchronized Output (PSO) for precise synchronizing of external devices, over-voltage shunt controller, and external fans for high-power operation.
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