RS1A03AAW Sanyo Denki
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The Sanyo Denki RS1A03AAW is a servo drive from the R SANMOTION Servo Drives series with an amplifier capacity of 30 Amps and a mass of 1.0 kilogram. This model uses an IGBT PWM sinusoidal control system and features a built-in dynamic brake and regeneration process. It operates with a wire-saving incremental encoder type at a resolution of 2000 pulses per revolution.
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Product Description:
The RS1A03AAW is a servo amplifier produced by Sanyo Denki for the R SANMOTION Servo Drives series. It interfaces between a motion controller and a matched AC servo motor, delivering regulated current and voltage so the motor can follow position, speed, or torque commands in automated machines, pick-and-place stations, or packaging lines. The compact 1.0 kg housing contains encoder feedback and protective circuitry, streamlining cabinet layouts and simplifying maintenance. Its integrated design also reduces the number of separate components and connections required inside the control cabinet.
This model operates from a three-phase 200 V-class power supply and can supply up to 30 A of continuous motor current. A sinusoidal IGBT PWM control system shapes the output waveform, keeping motor vibration low while enabling a closed-loop bandwidth of 600 Hz. Within that bandwidth, the amplifier supports a speed control ratio of 1:5000, allowing accurate regulation from slow inspection speeds to full-rate production. Rotor position is returned through a wire-saving incremental encoder that provides 2000 P/R resolution, giving the drive fine command granularity without excessive cabling. The reference signal is a DC ±2.0 V speed command. Matching monitor points provide 2.0 V ±10% outputs for speed and torque, allowing the host controller to verify real-time operating conditions without dedicated transducers.
The control section can draw an inrush current of 40 A (O-P), while the main power stage peaks at 18 A (O-P) during energization; fuses and contactors must accommodate these brief surges. A built-in dynamic brake dissipates regenerated energy during rapid stops, while an integrated regeneration circuit returns excess power to the DC link during lighter decelerations. Line leakage is limited to 0.5 mA, supporting compliance with ground-fault requirements. The amplifier combines current regulation, feedback processing, and protective functions within a compact enclosure, reducing the external equipment needed for position, speed, and torque control.
