Product Description:

The PY2A050A6 servo amplifier is produced by Sanyo Denki as part of the PY Super BL Servo Amplifiers series. It conditions drive power and command feedback between a motion controller and a matched brushless motor, allowing industrial equipment to regulate speed and torque without mechanical gearing. The main circuit accepts a three-phase mains input for operation with compatible industrial power systems.

The drive section can deliver up to 50 A of output current, providing the capacity needed to accelerate the connected mechanical load and support motor torque. Its power unit is rated for 200 VAC and includes a dynamic brake, so excess kinetic energy can be dissipated internally during rapid deceleration without external braking hardware. Closed-loop speed regulation spans a ratio of 1:5000, allowing the same motor to operate at low inspection speeds and then accelerate to full production speed while maintaining stable control. Internal carrier switching operates with 400 Hz frequency characteristics to reduce audible noise and torque ripple. A rush-current limiter caps inrush at 40 A, while the main line draws 23 A when charging the DC link.

Control electronics draw 40 VA through a separate service line, isolating the logic supply from the motor bus. Drive protection uses a current-limit input of ±2.0 VDC ±15%, allowing the controller to reduce torque when required by the process. Regenerative heat is absorbed by a built-in regenerative resistor, reducing the need for additional cabinet hardware. The amplifier does not provide a ready output signal. Real-time diagnostics are available through current and velocity monitor outputs; the current monitor produces 0.5 V at rated current, while the velocity monitor produces 0.5 V per 1,000 rpm, and both have a tolerance of ±20%. The amplifier housing measures 168 mm high and 135 mm deep, and it weighs 2.7 kg.