Three-phase SH3 servo — 1700 W continuous, 11 Nm torque curve
The SH31401M11A1100 is a three-phase servo motor from Schneider Electric's SH3 series, delivering 1700 W continuous power and a continuous stall torque of 11.1 Nm across the 115...480 V three-phase range. Nominal torque varies by supply: 11 Nm at 115 V single phase, 10.95 Nm at 230 V single phase, 10.6 Nm at 400 V three phase, and 10.4 Nm at 480 V three phase. Peak stall torque reaches 27 Nm over the same voltage band. Nominal speed follows the same pattern — 375 rpm at 115 V single phase, 750 rpm at 230 V single phase, 1500 rpm at 400 V three phase, and 1800 rpm at 480 V three phase — so the motor's speed-torque envelope shifts with the available line voltage.
Encoder, cooling, and environmental sealing
The motor carries an absolute single-turn SinCos Hiperface encoder, providing position feedback without a homing cycle on power-up — a time-saver on multi-axis lines where the controller expects absolute position at boot. Cooling is natural convection — no fan, no filter, no periodic cleaning schedule. The IP65 rating covers both the motor body and the shaft bushing per IEC 60034-5, so the unit withstands washdown and airborne particulates without an external shroud.
Mounting flange, shaft, and mechanical interface
The motor flange size is 140 mm (5.5 in) with a centring collar diameter of 130 mm and 11 mm mounting holes — a standard international flange pattern that mates with common gearboxes and mounting brackets. Shaft diameter is 24 mm (0.9 in) with a parallel key and 50 mm shaft length; the key width is 8 mm. Maximum radial force at the shaft is 1930 N at 1000 rpm, derating to 1340 N at 3000 rpm — a load limit to check when coupling to a belt or direct-drive load. Maximum axial force is 300 N; the centring collar depth is 3.5 mm. Electrical connection uses a rotatable right-angled connector or a straight connector — the rotatable option helps route the cable in tight cabinets.
Electrical parameters and thermal limits
Stator resistance is 5.3 Ω, stator inductance is 88.55 mH, and the torque constant is 2.78 Nm/A at 120 °C copper temperature. The back EMF constant is 193 V/krpm at 20 °C, which sets the voltage ceiling at high speed. Continuous stall current is 4 A; maximum RMS current is 10.8 A. The motor has 5 poles and a hot-spot copper temperature rating of 130 °C — the thermal limit for the winding insulation class.