ETEL LMG15‑070‑3QC‑H11 Linear Motor

The ETEL LMG15‑070‑3QC‑H11 is a high‑performance linear motor designed for precision linear motion applications in industrial automation, semiconductor manufacturing, and machine tooling. As part of ETEL’s LMG series, this motor employs a direct‑drive, iron‑core design that delivers high force output, exceptional stiffness, and excellent dynamic response. It eliminates the need for mechanical transmissions such as ball screws, belts, or rack‑and‑pinion, resulting in zero backlash, high accuracy, and reduced maintenance.

This model provides a continuous force of up to 70 N (peak force significantly higher) and features a three‑phase, brushless design with high‑grade magnets. The motor is equipped with a built‑in Hall sensor or encoder interface for precise commutation and position feedback. It operates from a 300 VDC bus and is compatible with standard ETEL servo drives (DSB series).

The LMG15‑070‑3QC‑H11 features a robust, water‑resistant housing (IP54) and is designed for operation in moderate industrial environments. Its low cogging force and linear force‑current characteristic ensure smooth motion even at low speeds, making it ideal for high‑precision positioning tasks.

Technical Specifications

Coil assembly: 3‑phase, iron‑core. Continuous force: 70 N. Peak force: 200 N. Rated current: 5 A (peak 15 A). Motor constant: 14 N/√W. Thermal resistance: 0.8°C/W. Back EMF: 30 V/m/s. Inductance: 0.8 mH. Resistance: 0.3 Ω. Feedback: Hall sensors + incremental encoder (optional). Cooling: natural convection or air cooling. Protection class: IP54. Weight: 3.5 kg.

The motor includes a built‑in thermal sensor (PTC) for overtemperature protection. It is supplied with a standard magnet track length of 300 mm (customizable). The unit is designed for easy integration into linear stages and gantry systems.

Applications and Benefits

This linear motor is widely used in high‑precision applications such as wafer handling, laser engraving, dispensing, and 3D printing. Its direct‑drive design eliminates backlash and friction, enabling higher acceleration and deceleration rates. The high force density allows compact machine designs with improved throughput.

The motor’s simple construction (no moving cables or brushes) translates to low maintenance and long service life. The integrated feedback options simplify system integration and enhance control accuracy.

Installation and Commissioning

Install the motor by mounting the magnet track on the fixed structure and the coil assembly on the moving part. Ensure proper alignment and air gap (typically 0.5‑1 mm). Connect the power and feedback cables. Commissioning requires configuring the drive parameters (motor constants, commutation offset, current limits) using ETEL’s MotionWizard software. Perform autotuning to optimize control loops.

Reliability and Support

ETEL linear motors are built to high standards, with rigorous testing for electrical and mechanical performance. The LMG15‑070‑3QC‑H11 is backed by ETEL’s global service network and technical support.

Conclusion

The ETEL LMG15‑070‑3QC‑H11 linear motor offers exceptional force, precision, and reliability for demanding linear motion applications. Its direct‑drive design and robust construction make it an ideal choice for high‑performance automation systems.