Sizing the motor across the supply rails
The SH32051P12A1200 is a SH3-series AC servo motor sized for a multi-voltage drive: 5500 W continuous at 400 V three-phase, 5200 W at 480 V three-phase, 4240 W at 230 V single-phase, and 2510 W at 115 V single-phase, so the same frame can be specified for global cabinet builds and 230 V retrofit lines without a substitution. Nominal torque tracks the supply: 31.9 N.m at 115 V single-phase, 27 N.m at 230 V single-phase, 17.5 N.m at 400 V three-phase, and 13.8 N.m at 480 V three-phase. Peak stall torque reaches 110 N.m across the 115–480 V envelope, with a continuous stall torque of 36.9 N.m — useful when sizing the drive current limit for short overload bursts.
Mechanical fit on the machine
Mounting is an international standard flange with a 205 mm flange, 180 mm centring collar taken to 4 mm depth, and four 14 mm mounting holes — a drop-in footprint for the standard 205 mm servo flange. The parallel-key shaft is 38 mm in diameter with a 10 mm key and an 80 mm shaft length, so coupling and pinion selection follows the usual SH3 shaft conventions. Shaft loading limits are part of the BOM decision: maximum axial force Fa is 740 N, and maximum radial force Fr drops from 3730 N at 1000 rpm to 2960 N at 2000 rpm and 2580 N at 3000 rpm. Belt drives and pinions at the high-speed end of the curve should be checked against these Fr values before the gearbox ratio is locked. Sealing is split by zone per IEC 60034-5: IP65 on the motor body and IP65 on the shaft bushing, with the housing rated IP67, so the assembly tolerates washdown and damp cabinet environments as long as the shaft seal and connector face are seated.
Drive side, encoder and electrical interface
Feedback is an absolute multiturn SinCos Hiperface encoder, which means the drive pairing must support the Hiperface protocol — Lexium 32 / Lexium 32i and the matching LXM drives are the natural fit for SH3 motors. Electrical connection is a straight connector, oriented along the motor axis rather than at an angle. The motor has 5 poles, stator resistance of 0.3 Ohm, stator inductance of 2.97 mH, and a back-EMF constant of 104 V/krpm at 20 °C. Torque constant is 1.75 N.m/A at 120 °C winding temperature, so current-loop tuning on the drive should use the hot Kt figure rather than the cold one to avoid an over-current trip at sustained load.
Thermal envelope and cooling method
Cooling is natural convection only — there is no integrated fan, so the cabinet layout must give the fin surface clear airflow and the mounting flange a conductive path to a heat-sunk surface where the duty cycle demands it. Hot-spot copper temperature is rated 130 °C, which sets the derating ceiling above the 120 °C torque-constant reference. Continuous output at 400 V three-phase (5500 W) is the rated operating point; pushing the motor into the higher single-phase figures (4240 W at 230 V, 2510 W at 115 V) requires the drive to deliver the matching current without tripping on I²t.
Sourcing posture for this BOM line
There is no L* successor on file, no PCN/EOL notice in the ledger, and no peer cross-reference — the part is specified as SH32051P12A1200, sizing reference SH32051P12A1200 (sizing key SH32051P12A1200) and shipped as a single unit per package. Compliance documentation (RoHS, REACH, UL, IEC) is not stated in this listing — the IEC 60034-5 sealing clauses are referenced for IP ratings, but no separate declaration pack is on file here.