Product Description:

The EB-406-A-11 is an explosion-proof AC servo motor produced by Kollmorgen within the EB Explosion Proof Motors series. It is designed to deliver closed-loop torque and speed control in hazardous industrial zones where flammable gases may be present. This allows motion systems such as mixers, conveyors, or pumps to operate safely behind rated enclosures.

At a continuous stall torque of 17.6 N·m, the motor can hold a load without overheating while drawing a steady 9.5 A RMS. Its back electromotive force constant is 113.0 Vrms/kRPM, which indicates the voltage required from the drive as speed rises. The phase inductance is 42 mH, which helps moderate current ripple from the inverter, and the winding resistance is 1.70 Ω, contributing to thermal losses. Nominal operation occurs from a line supply of 230 Vrms. Position feedback is handled by a resolver, giving analog sine-cosine signals that are well suited to rugged, high-temperature service. A torque constant of 1.87 N·m/A RMS links command current to delivered torque, while the low rotor inertia of 0.000929 kg·m² supports rapid acceleration cycles. The 165.00 mm mount bolt circle aligns with standard NEMA frames, and the overall length of 386.0 mm fits legacy equipment layouts.

For short bursts, the motor withstands 48.5 N·m of peak torque by accepting up to 27.3 A RMS. Rated speed is 1700 rpm, and this operating point yields a shaft output of 2.9 kW. This overload capacity allows machines to clear jams or accelerate inertial loads without requiring a larger drive. The explosion-proof housing supports continuous-duty use in Class I Division 1 environments. Despite its flame-tight housing, the unit weighs 21.5 kg, which helps keep installation manageable.