Mitsubishi Electric HG-SR301BJ HG-SR Series AC Servo Motor

Description

Engineered for high-inertia industrial motion control, the Mitsubishi Electric HG-SR301BJ represents a robust AC servo solution designed to deliver precise torque and speed synchronization within demanding automation architectures. Incorporating a factory-fitted electromagnetic brake and a protective oil seal, this HG-SR Series motor is optimized for positioning applications requiring high torque at lower operational speeds. Its medium-capacity design makes it highly suitable for integration with MR-J4 servo amplifiers, ensuring seamless communication and high-resolution encoder feedback.

Key Features

• High-Inertia Capability: Ideal for applications with fluctuating loads or heavy-duty mechanical linkages.
• Electromagnetic Brake: Integrated holding brake configuration for secure position retention during power-off states.
• Industrial Protection: Outfitted with an integrated oil seal to safeguard internal windings against industrial fluids.
• Thermally Stable: Designed for continuous duty cycles under standard operating temperatures.

Applications

• Heavy material handling and gantry positioning systems.
• Metal processing and stamping press feed systems.
• Large-scale packaging and indexing machinery.
• Rotary table drives and high-torque machine tool axes.

Technical Specifications

Empirical Engineering Insights

Alternative Models & Compatibility

This unit is built to interface directly with Mitsubishi MR-J4 servo drive architectures. When substituting older HC-SFS series motors, verify amplifier firmware compatibility, parameter configuration adjustments, and shaft physical envelope clearances. Suffix "BJ" indicates a dedicated electromagnetic brake and an oil seal; standard "G" or non-brake variants are not direct plug-and-play drops without re-engineering the emergency-stop control loops and dynamic braking profiles.

Application Pitfalls & Engineering Notes

While the oil seal prevents lubricant ingress from gearboxes, continuous submersion or excessive splashing can compromise the sealing lip over extended operation. Ensure proper runout checks on the mechanical coupling to avoid radial or axial load concentrations that exceed the mechanical shaft bearing ratings, as excessive loading leads to premature bearing failure and high audible noise levels.

Commissioning & Wiring Tips

Always decouple the motor from the mechanical load during initial direction-of-rotation and encoder phasing checks. Run the motor's 24V DC brake supply on a dedicated, stabilized DC power line separate from the main controller logic power supply to prevent noise coupling and unexpected voltage drops that may cause brake chatter.

Installation Guidelines