What this PacDrive 3 ILM motor actually is
The ILM1401P21F0000: The part is a PacDrive 3 ILM servo motor with the drive stage integrated into the housing — one cable run, no separate amplifier cabinet, intended for high-speed packaging and material-handling machines on a Lexium/PacDrive platform. It is a 140 mm international-standard flange, four-hole mount with an untapped 24 mm shaft and a second shaft end omitted — the standard PacDrive 3 mid-frame form factor.
Torque envelope and the sizing decision it forces
The motor delivers 4.6 N·m nominal torque and 7.5 N·m continuous stall torque, peaks at 27 N·m stall, with the holding brake rated at 18 N·m — meaningful at rest only, sized for vertical-axis hold rather than dynamic braking torque. Continuous current is 4.7 A and 2.9 A rated line current, with a peak Irms of 18.8 A on the integrated drive — the loop must be sized to deliver that 18.8 A peak transient without tripping the drive stage on repetitive accel/decel cycles. Output power sits at 1450 W at the 3000 rpm nominal speed — pick this frame when the application needs that continuous mechanical horsepower, not when a smaller PacDrive 3 ILM stack will cover it without the thermal overhead.
Electrical constants the drive commissioning needs
Back-EMF constant of 108 V/krpm at 20 °C sets the bus voltage headroom the drive must hold — ke climbs with stator temperature along with the torque constant of 1.6 N·m/A, both measured at 120 °C. Stator resistance drops from 1.81 Ω at 20 °C to 1.26 Ω at 120 °C phase-to-neutral — the cold-loop resistance is what the drive sees at first enable, the hot value is what I²R loss is calculated from for the thermal balance. Stator inductance runs 19.1 mH phase-to-phase at 20 °C, falling to 9.55 mH phase-to-neutral at 120 °C — relevant to the current loop bandwidth and the switching frequency the integrated drive has to support.
Mechanical envelope, sealing, and shaft-side load
Length is 11.5 in (292 mm) with a key width of 1.6 in (40 mm) and a 50 mm shaft length — that 292 mm depth behind the flange is what determines whether a given machine's existing cut-out swallows the motor without a bracket redesign. Maximum radial force is 2210 N at 1000 rpm, 1760 N at 2000 rpm, 1530 N at 3000 rpm, with axial force capped at 0.2 × Fr — the radial figure derates with speed, so belt-driven loads get tighter as the line accelerates past the nominal rpm. IP65 sealing combined with natural convection cooling means the motor stands up to hose-directed washdown but dissipates heat through the housing surface only — enclosed cabinets without forced airflow will see the thermal envelope close in faster than a fan-cooled equivalent. Feedback is a single-turn absolute SinCos Hiperface encoder — the absolute position returns at power-on with no homing cycle, and the SinCos tracks high-resolution position for the servo loop without a separate incremental channel.