Aerotech BA30-320 Servo Amplifier

The Aerotech BA30-320 is a servo amplifier for precise motion control in industrial automation. This compact, self-contained unit delivers 15 A continuous and 30 A peak output current across a 40–320 VDC range, with jumper-selectable operation for three-phase AC brushless or single-phase DC brush motors. The amplifier supports velocity, torque, dual-phase (brushless), and current command modes via ±10 VDC analog input, accepting quadrature encoder or tachometer feedback signals.

A 20 kHz IGBT power stage ensures reliable commutation, while complete electrical isolation - transformer-isolated control supply and opto-isolated drive, current, and fault signals - minimizes loop noise and safeguards against power-stage transients. Built-in protection covers under-voltage faults, over-current and over-temperature conditions, output short circuits, and DC bus overvoltage. The internal 5 VDC, 250 mA supply powers encoders and Hall Effect devices.

Optional shunt regulation (–S suffix models) manages elevated bus voltage and provides fuse-open shutdown capability.

Technical Specifications

• Motor Compatibility: Three-phase AC brushless; single-phase DC brush (jumper-selectable)


• Control Modes: Velocity, torque, dual-phase (brushless only), current command


• Power Stage: 20 kHz IGBT


• Continuous Output Current: 15 A


• Peak Output Current (2 seconds): 30 A


• Output Voltage Range: 40–320 VDC


• Command Input: ±10 VDC (velocity or torque)


• DC Bus: Up to 320 VDC operation


• Encoder Power Supply: 5 VDC, 250 mA


• AC Line Input: Direct connection

Key Features

• Transformer-isolated control voltage supply and opto-isolated signal paths


• Dynamic power limit circuit protects output transistors


• Current limit time-out circuit with programmable duration shutdown


• Protection: under-voltage (control and bias), RMS current limit, over-temperature, over-current, phase-to-phase and phase-to-ground short circuits, DC bus overvoltage


• External commutation capability


• Optional internal shunt regulator (–S models)

Feedback & Integration

• Accepts quadrature encoder or tachometer input


• Encoder signal converted to voltage representation of speed


• Isolated current feedback and fault signal paths

Typical Applications Precision motion control in industrial automation requiring DC-isolated amplification and multi-mode command flexibility.