Product Description:

The 8MSA3M.R0-K6 is a three-phase synchronous motor produced by B&R Automation as part of the 8MS Three Phase Synchronous Motors series. It is intended for closed-loop axis control in packaging machines, pick-and-place gantries, and other automation cells that demand compact drives with direct resolver feedback and medium dynamic torque. The motor belongs to size 3 with length code M, allowing installation where constrained axial space must still accommodate moderate power output.

At its continuous operating point, the unit delivers 0.63 kW of mechanical power at a rated speed of 6000 rpm while drawing 1.4 A from the drive. The medium relative rated torque is 1.3 Nm at standstill, supported by a stalled current of 1.67 A. Acceleration peaks are handled by a torque constant of 0.78 Nm/A, enabling a momentary shaft load of 5.2 Nm when the inverter supplies a peak current of 7.2 A. Electrical performance is supported by a 21.5 mH stator inductance that restrains ripple and by a back-EMF constant of 47 V per 1000 rpm. These values help match the motor with current-regulated inverters and indicate the thermal margins of the stator laminations.

The winding resistance measures 12.7 Ω, and together with an electrical time constant of 1.69 ms, it supports fast current rise for positioning profiles up to the motor’s maximum acceleration of 80000 rad/s². Heat generated by copper losses is dissipated through self-cooling, giving a thermal time constant of 30 min, so continuous duty can be achieved without external fans. Rotor position feedback is supplied by the integrated BRX resolver, which has ±1 angular-minute non-linearity and ±10 angular-minute precision for accurate axis control. During installation, the shaft may be pressed axially with up to 200 N without compromising the bearings. The size 3, length M housing keeps a compact footprint while maintaining medium torque capability for multi-axis assemblies.