Product Description:

The PY0A050A0GFBP01 servo amplifier is built by Sanyo Denki within the PY Super BL Servo Amplifiers series. As a key interface between a motion controller and a Super BL brushless motor, it receives low-level velocity or torque commands and modulates the DC bus into three-phase output that drives the motor’s windings. The device therefore enables precise position, velocity, and torque regulation in industrial robots, SMT platforms, and high-speed packaging lines.

At full output, the power stage delivers a continuous 50 A to the motor phases, so cabling and busbars must be sized for that steady-state current. During power-up, the control section draws a peak of 40 A, and the switch-mode supply inside is rated for 40 VA to support logic, gate drives, and fans. Closed-loop bandwidth is specified by a frequency characteristic of 400 Hz, allowing the amplifier to track rapid command changes without overshoot. Speed regulation is augmented by a wide velocity control range of 1:5000, while load disturbances are held within ±0.1% of the set speed. A current monitor jack outputs 2.0 V ±20%, and a separate velocity monitor provides 2.0 V ±10%, enabling oscilloscope diagnostics during tuning.

Protective hardware manages both transient energy and braking tasks. A main inrush limiter caps the startup surge at 18 A, after which the dynamic brake can absorb 1800 J and then transfer excess heat to an external resistor rated at 60 W with a resistance of 20 Ω. When the brake is released, it does so after 24.0 ms, keeping shafts stationary long enough for commanded stops to settle. Long-term speed fidelity remains stable despite ambient temperature changes, with a velocity temperature drift of ±0.5% and a bus voltage fluctuation sensitivity of ±0.1%. The metal chassis weighs 4.4 kg, permitting cabinet mounting without heavy support brackets.