Product Description:

The EB-402-B-11 is an explosion-proof AC servo motor produced by Kollmorgen as part of the EB Explosion Proof Motors series. In industrial automation it couples to gearboxes, conveyors, or index tables, delivering regulated rotation while preventing ignition within hazardous atmospheres. By integrating with servo amplifiers, the unit translates command signals into shaft motion that supports coordinated multi-axis tasks on production lines. This arrangement supports precise motion in areas where flammable gases or vapors may be present. It is intended for hazardous-duty motion systems that still require accurate speed and position control.

Electrical characteristics at standstill describe the motor’s continuous workload. A back electromotive force constant of 67.2 VRMS/kRPM establishes the voltage returned to the drive per thousand revolutions and helps determine speed feedback scaling. To maintain its nameplate load, the motor draws 6.4 ARMS, producing a continuous stall torque of 6.78 N-m. Internal copper loss is influenced by a winding resistance of 2.6 Ohms, while inductance of 50 mH helps filter current ripple. The torque constant is 1.11 N-m/ARMS, linking command current to mechanical output. Static friction of 0.24 N-m must be overcome before motion begins, and viscous damping of 0.015 N-m/kRPM adds a proportional drag term at running speed. These values describe current response at low speed and while holding position.

During transient moves the drive may deliver a peak current of 18.8 ARMS, allowing the rotor to reach a momentary stall torque of 19.8 N-m without demagnetization. Normal operation centers on the rated torque of 7 N-m at a supply of 230 VAC. The lightweight rotor, with an inertia of 0.000323 kg-m², supports rapid acceleration and deceleration profiles required by pick-and-place paths. That quick response suits applications with frequent starts, stops, and direction changes. Heat produced in the windings travels through a thermal path rated at 0.48 °C/W, and the assembly reaches thermal equilibrium over a 22-minute time constant, which allows short duty cycles above nominal load when average dissipation stays within limits.