AL2815-0000-0000-0001 by Beckhoff

The AL2815-0000-0000-0001 is a coil unit from Beckhoff's AL Linear Motors series. This moving-coil module belongs to the linear servo motor product range and generates direct thrust against a stationary magnetic plate, eliminating the need for mechanical transmissions in automation axes. A fixed 0.5 mm air gap separates the coil face from the magnets. The unit is supplied without connectors, allowing custom cable routing in compact machine frames.

During continuous operation, the coil produces 950 N of force while drawing 4.2 A. These ratings indicate the steady load that the axis can handle without exceeding the permitted winding temperature. The voltage constant is 107.48 V/m/s, linking back electromotive force to slider speed for drive sizing. A winding inductance of 120 mH influences current ripple under pulse-width modulation control, while the winding resistance of 15.2 ? contributes to predictable copper losses at rated current. The motor uses a normal winding configuration and has a power constant of 186 N/A, indicating the amount of force generated per ampere. Its maximum translational speed is 3 m/s, subject to the motor's electrical time constants and the servo amplifier's available voltage. The assembly contains 15 coils, weighs 5.9 kg, and uses natural convection because it does not have water cooling.

For short-duty operation, the motor can deliver a peak force of 2250 N with a corresponding peak current of 13.5 A, allowing rapid acceleration of light payloads. When the slider is de-energized, the magnetic circuit exerts an attraction force of 4150 N, so rigid guidance is required to withstand the magnetic load and maintain proper alignment. Mechanical integration is supported by the module's 130 mm width, which provides a clear reference for carriage and guide placement. The accompanying magnet track adds 10.5 kg of mass per meter, which must be considered when sizing the supporting machine structure. Natural convection requires sufficient open space around the coil housing to release heat during continuous high-load cycles.