Motor ratings across supply voltages — what the numbers mean for your drive selection
The SH32052P12F2000 is a three-phase servo motor from the SH3 series, rated for 7900 W continuous power with a peak stall torque of 220 N.m (1947.2 lbf.in) across 115...480 V three-phase supplies. The nominal torque and speed shift with the input voltage: at 400 V three-phase you get 38.1 N.m at 2000 rpm; at 480 V three-phase it delivers 28.4 N.m at 2400 rpm. This voltage-dependent curve means the same motor frame serves different speed-torque envelopes depending on the drive's DC bus — a single-phase 230 V input yields 56 N.m at 1000 rpm, useful for lower-speed high-torque applications without a gearbox. The continuous stall torque is 64.9 N.m (574.4 lbf.in) across the three-phase range, and the motor carries a holding brake rated at 80 N.m (708.06 lbf.in) — enough to hold a vertical load at standstill without servo current. The brake is engaged when power is removed, so the load stays put during a power loss or emergency stop.
Encoder feedback and mechanical integration — what fits where
The motor ships with an absolute multiturn SinCos Hiperface encoder, giving single-turn and multi-turn position data over a serial link plus analog sine/cosine tracks. This encoder type is common in high-performance servo drives from多家 brands (Lenze, SEW, Kollmorgen) — the Hiperface protocol is an open standard, so the motor mates with drives that support the interface without a separate feedback converter. The straight connector and the rotatable right-angled connector are both included, letting you route the cable out the back or to the side depending on the cabinet layout. The flange is an international standard 205 mm (8.07 in) pattern with a 14 mm mounting hole diameter and a 4 mm centring collar depth. The shaft is 38 mm diameter, 80 mm long, with a parallel key 10 mm wide. The overall length is 454.5 mm (17.9 in). This matches the IEC standard frame size for motors in this power class — it bolts directly to a standard gearbox or machine frame without adapter plates. IP protection is split: the motor body is IP65, the shaft bushing is IP54 without a shaft seal ring, and IP65 with the seal ring fitted. For washdown environments (food processing, pressure washing), specify the shaft seal ring option — the IP65 motor body alone does not seal the shaft exit. The cooling is natural convection, so no external fan or coolant lines are needed; derate the continuous torque if the motor is enclosed in a tight cabinet without airflow.
Electrical parameters and thermal limits — sizing the drive and cabling
The stator resistance is 0.3 Ohm and the inductance is 2.95 mH — these set the electrical time constant and the current ripple at the drive's PWM frequency. The torque constant is 2.52 N.m/A at 120 °C copper temperature, and the back EMF constant is 161 V/krpm at 20 °C. The maximum continuous current (Irms) is 96.8 A, which is also the 3-second peak current rating. This means the drive must supply 96.8 A peak for acceleration and deceleration, and the cable cross-section must handle that current without exceeding the motor's 130 °C copper hot-spot temperature.