Mitsubishi MR-J3-11KB AC Servo Drive

The Mitsubishi MR-J3-11KB is a high-power AC motion servo drive engineered for demanding industrial automation. This 11 kW unit delivers robust performance and precise control for heavy-duty applications. It is a key component of the reliable MELSERVO MR-J3 series from Mitsubishi Electric.

Core Electrical Specifications

• Manufacturer & Model: Mitsubishi MR-J3-11KB AC Servo Drive/Amplifier.
• Rated Output: 11000W (11 kW) with a high rated current of 68 A.
• Supply Voltage: 3-phase 200-230 VAC input (200V class).
• Input Type: Designed for 3-phase input (3P) industrial power.
• Control Method: Sine wave PWM and current control for smooth, accurate operation.
• Communication: High-speed SSCNET III/H optical network interface.

Performance & Protection Features

• Operating Modes: Supports precise positioning mode among other control modes.
• Cooling System: Forced ventilation cooling ensures thermal stability under heavy loads.
• Protection Functions: Overcurrent shut-off, regeneration overvoltage shut-off, motor overheat, and encoder fault protection.
• Ambient Temperature: Reliable operation in temperatures from 0 to +55 °C.
• Physical Weight: Robust construction with a weight of 14.56 lbs (6.61 kg).
• Application: Ideal for large presses, heavy material handling, and high-power CNC machinery.

Packaging & Shipping Details

• One Mitsubishi MR-J3-11KB Servo Drive unit.
• Complete installation manual and technical documentation.
• All necessary mounting hardware.
• Fast global shipping via FedEx, UPS, and DHL services.

Professional FAQ

• What types of industrial machines require an 11kW servo drive?

This drive is designed for very high-power applications such as large metal forming presses, heavy-duty injection molding machines, large industrial robots, and the main spindle or feed axes of large-scale CNC machining centers.

• How does the SSCNET III/H interface benefit this high-power system?

The fiber-optic SSCNET III/H network provides ultra-fast, noise-immune communication. This is critical for 11kW drives in synchronized multi-axis systems, ensuring real-time command updates for precise coordination and high-speed response.

• Why is encoder fault protection important?

If the encoder cable is damaged or disconnected, the drive loses critical feedback on motor position/speed. This protection immediately faults the drive to prevent uncontrolled motion (a "runaway" condition), which could cause machine damage or safety hazards.

• What does "regeneration overvoltage shut-off" protect against?

During rapid deceleration, the motor generates energy that raises the DC bus voltage. This feature shuts the drive off if the voltage exceeds a safe limit, protecting the drive's capacitors and power components from damage caused by excessive regenerative energy.

• What are the installation requirements for the forced ventilation cooling?

Ensure the drive is mounted vertically with the specified clearance (typically above and below) as per the manual. This allows the internal fan to effectively draw cool air in and exhaust hot air out, preventing thermal overload.

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