Product Description:

The GADSA02LA22 servo amplifier belongs to the G Sanmotion AC Servo Amplifiers series from Sanyo Denki. It converts a DC bus into sinusoidal phase currents that propel a matched servo motor, delivering precise speed, torque, and position control in automated assembly, packaging, and pick-and-place equipment. The unit sits between the motion controller and motor windings, monitoring feedback while modulating power.

An amplifier capacity of 20 A indicates the instantaneous switching limit of the power stage, while a continuous output rating of 3.1 Arms indicates the thermal current it can supply indefinitely. For short accelerations, the drive permits a peak current of 12.0 Arms, providing extra torque headroom without tripping protection. The internal bus draws up to 0.8 kVA from the facility supply, and the velocity loop maintains regulation across a range of 1:5000. Current is generated by an IGBT-based sinusoidal PWM control system that minimizes ripple, and overvoltage category III insulation allows direct connection to industrial mains. Command data arrives through an analog or pulse input interface, and an external regenerative resistor can be added when energy returns to the bus. The minimum accepted external braking resistance is 17 Ω. A sinking-type GPO issues status signals, and the STO function operates without a delay circuit for immediate torque removal.

The amplifier supports servomotors rated up to 400 W and tolerates reflected inertia as high as 10 times the motor rotor inertia, so modest load mismatches do not compromise loop stability. Mechanical durability is supported by a shock rating of 20 m/s² and a vibration tolerance of 6 m/s², allowing cabinet installation on moving gantries or press lines. When regeneration occurs, the drive logic automatically enables the external resistor. The sinking GPO can signal brake-energy events to a system controller.