Product Description:

The MST130A-0200-FT-N0CN-D303 is a frameless synchronous torque motor stator produced by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. Designed to be built directly into the machine housing, it eliminates belts or gearboxes and applies drive force right at the axis hub. Such direct-drive arrangements are common in indexing tables, roll feeders, and winders where high positional repeatability and smooth low-speed rotation are mandatory for process quality. By offering a hollow interior for the rotor and bearing arrangement, the stator keeps the overall envelope simple while giving designers freedom to route services through the center.

The stator delivers a nominal mechanical output of 1.88 kW at a rated speed of 2000 rpm with 9 Nm of continuous torque. At that operating point, the drive controls loop current to 7.5 A, while the copper winding presents 2.5 ohms of resistance at 20 °C, which contributes to conduction losses that the cooling jacket must remove. A torque constant of 1.2 Nm/A links drive current linearly to produced torque, making feed-forward control straightforward for indexing moves and tension regulation.

Thermo-encapsulation of the coil package improves vibration strength and directs liquid coolant across the stator surface so short bursts up to 15 Nm can be handled without thermal drift. During these overload events, the inverter may supply as much as 16 A, extending dynamic headroom for rapid starts. Even with this capability, the stator adds only 2.4 kg to the axis structure, helping keep servo responsiveness high. Ten pole pairs create the low electrical frequency needed for torque production at modest speeds, and the power leads exit in a line through the stator end for simplified cable routing. No integrated encoder is provided, so external feedback must be installed to close the position loop.