Product Description:

The PY2A050A4PF2S01 servo amplifier is built by Sanyo Denki for the PY Super BL Servo Amplifiers series. It accepts three-phase mains power, switches the power with a sine-wave pattern, and delivers regulated current to brushless motors so machine controllers can close a velocity loop without external power-conditioning hardware. In production lines or positioning tables, the amplifier’s speed-control interface allows real-time adjustment of motor speed to match process commands.

This model provides a continuous output of 50 A, giving sufficient current capacity for medium-frame servomotors. It operates from a 200 VAC supply and is intended for three-phase feeds commonly found in factory panels. During startup, the control section draws a surge of 40 A, while the power stage experiences 23 A of main inrush current; downstream protection devices must tolerate these short pulses. A sine-wave drive method minimizes torque ripple, and the dedicated speed-control interface accepts analog or pulse commands. The loop bandwidth reaches 400 Hz, so command changes are followed with limited delay. Velocity can be adjusted across a ratio of 1:5000, supporting both slow indexing and high-speed traverses from the same motor. For diagnostics, the current and velocity monitor terminals each provide proportional signals of 0.5 V ±20% that can be recorded through a controller’s analog inputs.

Excess kinetic energy is absorbed by an internal circuit rated for 1330 J, and a built-in regeneration resistor dissipates this energy without requiring an external module. Rotor feedback is interpreted at 6000 P/R, providing fine position information to the control loop. The amplifier weighs 2.7 kg, permitting cabinet mounting without heavy support brackets. Its sensor resolution supports precise velocity regulation across the available frequency response. The sine-wave power stage also reduces acoustic noise and promotes smooth motor operation at steady speeds.