Description

The HC-KFS23K-S49 is a high-performance AC servo motor manufactured by Mitsubishi Electric as part of its HC-KFS Series,designed for precision motion control in demanding industrial automation environments.Rated at 2.3kW with a maximum speed of 3000 RPM,this compact yet powerful servo delivers high torque,rapid response,and exceptional positional accuracy.Featuring a 22-bit absolute encoder and built-in safety compliance,the HC-KFS23K-S49 is engineered for seamless integration with Mitsubishi’s MR-J3 and MR-J4-TM series amplifiers,making it a trusted solution in CNC machining,robotics,semiconductor handling,and automated assembly systems.

Application Scenarios

At a precision medical device manufacturing facility in Germany,a robotic pick-and-place cell experienced positioning drift after power cycles,leading to rejected batches of micro-components.The root cause was traced to incremental encoders in the existing servo system,which required homing on startup.Engineers replaced the motors with HC-KFS23K-S49 units,leveraging their battery-free multi-turn absolute encoders.After integration,the robots retained exact position data even during unplanned outages,eliminating homing routines and reducing cycle startup time by 18 seconds per cycle.The HC-KFS23K-S49’s high torque-to-inertia ratio ensured smooth,jitter-free motion during delicate placement tasks,improving yield rates by 27%and demonstrating its critical role in high-precision automation.

Parameters

Main Parameters Value/Description

Product Model HC-KFS23K-S49

Manufacturer Mitsubishi Electric

Product Category AC Servo Motor

Rated Output Power 2.3 kW

Rated Torque 1.45 Nm

Maximum Torque 4.35 Nm(3x rated,short-term)

Rated Speed 3000 rpm

Maximum Speed 3000 rpm(mechanical limit)

Encoder Type 22-bit Absolute Encoder(14-bit multi-turn)

Voltage Class 200V AC(compatible with 200–230V systems)

Flange Size 50 mm(compact design)

Shaft Configuration Keyed shaft with brake option(S49 variant includes brake)

Brake Type Spring-applied,electrically released(24VDC)

Insulation Class Class F(155°C)

Protection Rating IP65(dust-tight,protected against water jets)

Cooling Method Natural convection

Mounting Orientation Any

Compatible Amplifiers MR-J3-20B,MR-J4-TM20B,and higher

Certifications CE,UL,cUL,RoHS,SIL 3(system-level with safe torque off)

Note:S49 suffix indicates integrated electromagnetic brake for holding applications.

Technical Principles and Innovative Values

Innovation Point 1:Battery-Free Absolute Multi-Turn Encoder

The HC-KFS23K-S49 features a 22-bit high-resolution encoder with 14-bit multi-turn capability,eliminating the need for backup batteries.This ensures position data is retained during power loss,reducing maintenance and enhancing system reliability—especially critical in lights-out manufacturing.

Innovation Point 2:High Torque-to-Inertia Ratio for Dynamic Response

With a rotor inertia optimized for rapid acceleration,the HC-KFS23K-S49 achieves faster settling times and tighter control in high-speed applications.Its 4.35 Nm peak torque allows quick response to load changes,ideal for indexing tables and robotic joints.

Innovation Point 3:Integrated Electromagnetic Brake(S49 Variant)

The built-in brake engages automatically on power loss,securely holding loads in vertical or safety-critical axes.Designed for high cycle life,it enhances safety and energy efficiency by reducing amplifier holding current.

Innovation Point 4:Industrial-Grade Environmental Protection

Rated IP65,the HC-KFS23K-S49 withstands dust,coolant spray,and oil mist common in machine tool environments.Its rugged construction ensures long service life even in harsh production floors.

Application Cases and Industry Value

A CNC machining center in Michigan upgraded its Y-axis feed drives from older 1.5kW servos to the HC-KFS23K-S49 to meet tighter tolerances on aerospace components.The increased torque and stiffness reduced vibration during high-speed contouring,improving surface finish from 1.6µm to 0.8µm Ra.Combined with Mitsubishi’s vibration suppression tuning,the HC-KFS23K-S49 extended tool life by 35%and cut scrap rates by 22%,delivering a rapid ROI and validating its performance in high-precision metalworking.

In a packaging line in Japan,a horizontal form-fill-seal machine required faster indexing without compromising seal accuracy.By replacing legacy motors with HC-KFS23K-S49 units on the sealing jaw axis,the line speed increased from 60 to 78 cycles per minute.The absolute encoder ensured perfect phase alignment after every stop,eliminating misaligned seals.Maintenance teams reported zero encoder-related faults over 18 months,highlighting the HC-KFS23K-S49’s durability and operational consistency.

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