Product Description:

The IL18050A2TRC4 is an ironless direct-drive linear motor coil sold by Kollmorgen within the IL Ironless DDL Motors series. Paired with its stationary magnet way, the coil produces thrust without belts or screws, making it suitable for pick-and-place stages, semiconductor steppers, and other axes that demand cog-free motion and tight position control. The ironless construction removes magnetic attraction forces, keeping the moving mass low so the stage can accelerate and settle quickly while minimizing conductive heat flow into delicate payloads. Because the moving coil contains no iron, the axis can maintain smoother low-speed travel with less disturbance from magnetic pull. This layout also supports precise positioning on applications where small motion corrections must remain stable and repeatable.

At the reference ambient temperature of 25 °C, the coil delivers a continuous linear thrust of 131 N, sustained by a winding current of 3.1 Arms. Electrical losses are governed by a phase-to-phase resistance of 6.4 Ω, while drive response is influenced by the line-to-line inductance of 2.25 mH. Thermal coupling to the machine frame is characterized by a thermal resistance of 0.419 °C/W, so steady-state temperature rise remains predictable when operating at rated load. The active copper section measures 302.8 mm long, 25 mm wide, and weighs 0.72 kg, which helps keep the moving assembly compact. This combination of electrical and thermal behavior supports stable continuous operation when the axis is mounted to a structure that can carry heat away effectively.

During short moves, the coil can apply up to 600 N of peak force when energized with a brief 14 Arms current pulse, giving the axis additional thrust for rapid indexing. The generated back electromotive force grows with speed according to a constant of 34.9 Vpk/m/s, a value the servo amplifier must accommodate during commutation and regeneration. Overall electrical loading is capped by a continuous power rating of 1140 W, and the magnet way adds 12.2 kg per meter to the axis while providing a 98.5 mm working gap height. Drive selection must account for both the voltage rise at speed and the short-duration current demand so motion remains controlled during aggressive acceleration. These operating conditions are important when the motor is used on fast linear stages that alternate between brief bursts of force and longer periods of continuous travel.