Speed-torque envelope and supply voltage dependency
The SH31402P11F2200 is a three-phase, 5-pole servo motor with a nominal speed that shifts with the supply — 750 rpm at 115 V single phase, 1500 rpm at 230 V single phase, 3000 rpm at 400 V three phase, and 3600 rpm at 480 V three phase. The pole count (5) is uncommon; it means the motor's base speed at a given electrical frequency differs from a standard 4-pole machine, so the drive's pole-pair parameter must be set to 5, not 4, or the speed feedback loop will be mis-scaled. Nominal torque drops as voltage rises: 164.6 lbf.in (18.6 N·m) at 115 V single phase down to 85.9 lbf.in (9.7 N·m) at 480 V three phase. The torque constant is 1.47 N·m/A at 120 °C copper temperature, so the drive's current limit directly sets the usable torque ceiling. At 44.1 A RMS maximum current, peak stall torque reaches 531.9 lbf.in (60.1 N·m) across the 115–480 V three-phase range — enough for aggressive acceleration, but only for the 3-second I²t window the drive allows.
Holding brake and mechanical interface
The integrated holding brake delivers 203.6 lbf.in (23 N·m) static torque — this is the Z-axis or vertical-load brake that keeps the load stationary when power is removed. It is not a dynamic braking resistor; the brake engages mechanically on de-energization and must not be applied while the motor is rotating above a few rpm, or the friction lining wears prematurely. Shaft is 0.9 in (24 mm) diameter with a parallel key, 2.0 in (50 mm) shaft length, 0.3 in (8 mm) key width. The motor flange is 5.5 in (140 mm) with a 0.1 in (3.5 mm) centring collar depth and 0.4 in (11 mm) mounting holes. Mounting follows the international standard flange pattern — the centring collar registers the motor concentric to the load, and the parallel key transmits torque. Maximum radial force on the shaft bearing drops with speed: 2240 N at 1000 rpm, 1780 N at 2000 rpm, 1550 N at 3000 rpm. A belt-driven or overhung load at 3000 rpm must not exceed 1550 N radial force, or bearing life shortens. Maximum axial force is 300 N.
Encoder feedback and electrical connection
Encoder is an absolute single-turn SinCos Hiperface type — single-turn means absolute position within one revolution, no battery backup needed for position at power-up within the first turn. The SinCos analog tracks allow high interpolation resolution (typically 2^12 to 2^16 counts per revolution), but the drive must support the Hiperface protocol. The rotatable right-angled connector lets the cable exit in four orientations, useful when the motor is mounted in a tight cabinet corner. Stator inductance is 3.855 mH and stator resistance is 0.6 ohm — these values set the electrical time constant and influence the drive's current-loop tuning. Back EMF constant is 101 V/krpm at 68 °F (20 °C), so at 3000 rpm the motor generates about 303 V line-to-line back EMF. The drive's DC bus must be high enough to overcome this back EMF plus the IR drop at full current.
Environmental sealing and thermal management
IP65 on the motor body and shaft bushing, IP67 on the housing — the motor is washdown-rated on the housing, but the shaft bushing is only IP65. In direct-spray food-and-bev or washdown zones, the shaft seal is the ingress point; a shaft cover or labyrinth seal may be needed for sustained IP67 exposure. Cooling is natural convection — no external fan, so the motor relies on its own surface area and the mounting flange to dissipate 3.9 kW continuous power. Ambient temperature must stay below the 266 °F (130 °C) copper hot-spot limit.