Product Description:

The EB-404-D-91-B3-001 is an explosion-proof brushless motor manufactured by Kollmorgen in the EB Explosion Proof Motors series. Its sealed frame allows the unit to operate inside hazardous-location machinery while driving pumps, agitators, or conveyors at controlled speeds. By combining flame containment with servo-grade response, the motor gives integrators a means to position or regulate loads accurately without introducing an ignition source to the surrounding atmosphere.

The electrical output characteristics start with a back-electromotive-force constant of 53 VRMS/KRPM, which indicates how much voltage the winding produces per 1000 rpm of shaft speed. During continuous duty, the winding carries 15 ARMS, a current level that matches process loads to thermal limits. The machine is rated for a line-to-line voltage of 230 VRMS, so compatible inverters must supply that magnitude for full performance. Under these conditions, the shaft delivers a peak torque of 37.50 N·m for short transients, while sustained motion takes place at the rated speed of 3700 RPM with a steady 11.50 N·m of torque. Complementary figures include a stall torque of 13.10 N·m, a direct-current resistance of 0.63 ohms that influences copper loss, and a 15 mH phase inductance that shapes current ripple. Maximum permissible line voltage is 250 VRMS, providing headroom for regenerative events.

Additional limits refine dynamic behavior. Output power reaches 6.00 HP, which ties mechanical work capability to thermal design. Acceleration bursts draw a peak line current of 45 ARMS, so the drive and conductors must tolerate that momentary load. The spring-applied brake uses a coil resistance of 27.37 Ohms and releases at 24 VDC, holding the shaft whenever control power is absent. A torque constant of 0.88 N·m/ARMS links commanded current directly to produced torque, allowing drive algorithms to calculate force with minimal latency.