Mitsubishi Electric HC-SFS352B HC-SFS Series AC Servo Motor

Description

Engineered for high-demand closed-loop positioning systems, the Mitsubishi Electric HC-SFS352B AC Servo Motor delivers a robust 3.5 kW power output combined with medium inertia characteristics. Operating within the MELSERVO-J2-Super system architecture, this motor is specifically optimized for applications requiring stable speed regulation, high-resolution feedback, and precise deceleration performance. The integrated electromagnetic safety brake ensures structural holding power during power-loss scenarios, protecting critical mechanical axes from unexpected gravitational drops or inertia-driven overtravel.

Key Features

• Medium Inertia Rotor: Provides ideal load-to-motor inertia matching for heavy-duty cyclical applications, preventing overshoot and mechanical resonance.
• Integrated Electromagnetic Brake: 24VDC spring-activated holding brake designed to lock mechanical axes securely when de-energized.
• High-Resolution Feedback: Equipped with a 17-bit incremental/absolute encoder providing 131,072 pulses per revolution for exceptional positioning resolution.
• Rugged Environmental Protection: IP65 rated body enclosure (excluding shaft-through and connector areas) engineered to withstand harsh industrial workspaces.

Applications

• High-speed gantry systems and heavy material handling transfers.
• Multi-axis CNC machine tool feed axes and industrial machining tables.
• Continuous-operation textile machinery and commercial printing presses.
• Automated packaging machinery requiring strict dynamic synchronized motion.

Technical Specifications

Connections and Interfaces

This servo motor features dedicated military-style MS round connectors for power and encoder connections, ensuring IP65 liquid resistance when mated correctly.

Empirical Engineering Insights

Alternative Models & Compatibility

The HC-SFS352B belongs to the legacy MELSERVO-J2S line and pairs natively with the MR-J2S-350A or MR-J2S-350B amplifiers. For migrations or system updates to contemporary lines such as the MR-J4 series, you must transition to the HG-SR352B motor and MR-J4-350A/B amplifiers. Direct physical drop-in replacements with newer controllers require specific adapter cables due to differences in encoder feedback protocols.

Application Pitfalls & Engineering Notes

Continuous high-cycle operation near rated torque generates significant heat. Ensure the motor is bolted directly to an appropriate heat-sink flange (minimum recommended aluminum surface area is 400mm x 400mm x 20mm) to avoid thermal overload faults (AL.30 or AL.46) on the associated amplifier drive. Avoid placing the motor in non-ventilated enclosures without active external cooling.

Commissioning & Wiring Tips

To suppress electro-magnetic interference (EMI) that may trigger feedback faults (such as AL.16 or AL.20), route the motor power cables and the encoder cables in separate, grounded steel conduits. Keep the distance between these lines at least 10 cm apart. When commissioning the brake, ensure it is powered via an isolated external 24VDC power supply with an independent surge-suppression diode rather than a PLC output directly.

Installation Guidelines