The Allen-Bradley 1391B-ESAA22-AQB Servo Drive, part of the B Series, is a precision-engineered single-axis AC servo controller ideal for optimizing performance in machine tool and electronic equipment applications. It features a robust 300V DC power bus with transient voltage protection and an integrated shunt regulator, designed to enhance motor operation by providing up to 300% peak current capacity and 30% more torque without loss. Capable of converting a 3-phase, 50/60 Hz input into a versatile AC voltage output, this controller ensures precise speed regulation and current control for AC servo motors with 1326 permanent magnets, available in consistent package sizes with 15, 22.5, and 45A RMS ratings.