Product Description:

The MST130E-0035-NS-N0CN-D303 is a frameless synchronous torque motor stator produced by Bosch Rexroth Indramat in the MST Synchronous Torque Motors series. As a direct-drive component, it is built to deliver high continuous torque at low speed so rotary tables, printing cylinders, or indexing heads can move without intermediate gearboxes in automated machinery. Because it is a frameless stator, it is intended to be integrated into the machine structure as part of a direct-drive axis.

Under rated operating conditions, the motor reaches 800 rpm while producing a continuous torque of 23 Nm, and this operating point corresponds to 1.9 kW of shaft power. That output is reached with a phase current of 3.5 A, reflecting moderate conductor loading within the 153 mm stack length. The electromagnetic design converts every ampere into torque with a constant of 6.60 Nm/A, so closed-loop controllers can map current setpoints directly to load demand. The three-phase winding has an electrical resistance of 15.1 Ω at 20 °C, and the back-EMF gradient is 0.340 V min⁻¹, which sets the drive-side voltage needed during acceleration. Copper losses leave the laminations as 0.22 kW of heat, and the 8.3 kg stator mass helps spread that thermal load over a reasonable surface area.

Transient demands are higher than the rated values: the motor can reach 950 rpm and deliver a peak torque of 65 Nm for short intervals. Meeting those bursts requires a supply current of 12 A per phase, yet the winding can accept that level because its thermal time constant is 15.0 min, so temperature rises gradually during intermittent overloads. At a complete stop, the magnetic circuit still develops 24.3 Nm, and the standstill current of 3.8 A helps the axis hold position without a mechanical brake. When combined with a matched encoder and inverter, the stator supports precise rotary motion in demanding production equipment.