Product Overview
When a production line demands precise positioning and reliable torque, the Mitsubishi HG-KR73BJ brushless AC servo motor delivers consistent performance. This model from the HG Series integrates a 22-bit absolute encoder for accurate feedback and control. With a rated output of 0.75 kW and a voltage class of 200VAC, it suits a wide range of automation tasks.
Technical Specifications Breakdown
The HG-KR73BJ operates at a rated speed of 3000 rpm and can reach a maximum speed of 6000 rpm. It provides a rated torque of 2.4 Nm and a maximum torque of 8.4 Nm, enabling it to handle both steady-state and peak load demands. The motor draws a rated current of 4.8 Amps and supports a maximum current of 17 Amps, ensuring robust performance under varying loads. Its low inertia design allows quick acceleration and deceleration, critical for high-cycle applications.
Industry Applications
In packaging machinery, the HG-KR73BJ's low inertia and high torque enable rapid indexing and precise placement. For CNC machine tools, the 22-bit absolute encoder ensures repeatable positioning without homing cycles, reducing downtime. The IP65 rating and included oil seal make it suitable for environments with dust and coolant splash, such as automotive assembly lines.
Installation & Setup Guidance
Mount the HG-KR73BJ using its straight shaft to the load coupling. Ensure the motor is securely fastened to a rigid base to minimize vibration. Connect the power and encoder cables according to Mitsubishi's wiring diagram, verifying that the 200VAC supply matches the voltage class. The electromagnetic brake requires a separate control signal for engagement; test its operation before full production use.
Maintenance & Reliability
Regularly inspect the oil seal for wear, especially in dusty or wet environments. Check the encoder cable connections for tightness to prevent signal loss. The IP65 enclosure protects against water jets, but avoid direct high-pressure washdowns on the shaft seal. Periodically verify that the electromagnetic brake engages and releases smoothly. Following these steps extends motor life and maintains positional accuracy.
Compatibility & Integration
The HG-KR73BJ integrates with Mitsubishi servo drives that support 22-bit absolute encoders. It works seamlessly with MR-J4 series drives for high-speed communication. Confirm that the drive firmware matches the encoder resolution to avoid configuration errors. The motor's low inertia pairs well with high-response controllers in applications requiring rapid settling times.
Selection Guide & Purchasing Advice
Before ordering, verify that your application requires a 200VAC class motor with 0.75 kW output. Check the available shaft dimensions and mounting flange compatibility. SpareTechPLC stocks the HG-KR73BJ and can provide current lifecycle status and availability. Contact our team for assistance with matching this motor to your existing system.
Frequently Asked Questions
Q: What is the encoder resolution of the HG-KR73BJ?
A: The HG-KR73BJ uses a 22-bit absolute encoder, providing 4,194,304 counts per revolution for precise position feedback.
Q: Can this motor operate without the electromagnetic brake?
A: The brake is included for holding torque when power is off. You can disable it electrically, but for safety-critical vertical loads, always use the brake.
Q: What is the maximum cable length between motor and drive?
A: While not specified in the data, follow Mitsubishi's guidelines for encoder cable length to maintain signal integrity. Typically, keep runs under 50 meters.
Q: Is the HG-KR73BJ suitable for continuous duty?
A: Yes, with a rated torque of 2.4 Nm and rated current of 4.8 Amps, it is designed for continuous operation within these limits.
Q: What maintenance does the oil seal require?
A: Inspect the oil seal periodically for cracks or leaks. Replace it if contamination enters the motor housing. No lubrication is needed.
