Motor overview and key ratings
The BMI0703P26A is a three-phase BMI-series servo motor built for precise speed and position control in industrial automation. It delivers 2.9 Nm nominal torque and 3300 rpm at 400 V three-phase supply, with torque rated for 208 V and 480 V lines as well. Feedback is absolute single-turn SinCos Hiperface, providing position data on power-up without a homing cycle — a direct fit for drives supporting the Hiperface protocol. The 10-pole, 3-stack rotor design gives 25.6 mH stator inductance and 1.41 Nm/A torque constant at 20 °C, which sets the current-to-torque gain for tuning the drive loop.
Electrical and performance characteristics
Supply voltage range is 208…480 V three-phase, 50/60 Hz. Nominal output power is 900 W on 400 V or 480 V and 450 W on 208 V. Continuous stall torque is 3.4 Nm across the voltage range, with peak stall torque of 8.6 Nm regardless of line voltage. Continuous stall current is 2 A; maximum RMS current is 12.5 A across all three-phase voltages. The 3-second peak current is 6 A. Back EMF constant is 95.39 V/krpm at 20 °C, and stator resistance is 7.99 Ω — these values guide the drive's current loop and velocity loop tuning. Cooling is natural convection, so the motor relies on free air movement. IP65 rating allows installation in washdown and dusty environments without external protection.
Mechanical interface and mounting
Motor flange size is 70 mm (2.8 in) with an international standard flange pattern, centring collar diameter 60 mm and depth 2.5 mm. Shaft diameter is 14 mm (0.6 in), shaft length 30 mm (1.2 in), untapped, no second shaft end. Maximum radial force varies with speed: 730 N at 1000 rpm down to 400 N at 6000 rpm. Maximum axial force is 0.2 × Fr. Electrical connection is via a printed circuit board connector. Overall length is 300 mm (11.8 in), which includes the connector and shaft protrusion. Mounting holes are 5.5 mm diameter on the flange.
No successor or cross-reference is documented; the motor is the current offering in this frame size and feedback type.