Product Description:

The Bosch Rexroth Indramat MST130C-0300-NS-N0RD-NNNN is a frameless stator section offered within the MST Synchronous Torque Motors series. Integrated into rotary tables, winding stations, or tool changers, the unit supplies direct electromagnetic torque without gearboxes, allowing precise angular positioning while reducing maintenance linked to belts or reducers. The laminated core and windings are matched to compatible drive controllers, enabling closed-loop control through sinusoidal commutation. Because torque is produced directly at the axis, the drive train can avoid backlash from reduction components and respond cleanly to small command changes. It uses permanent-magnet excitation to generate smooth sinusoidal torque and attaches to the machine housing by a press-fit outer diameter.

At its continuous operating point, the motor outputs 2.14 kW of mechanical power while spinning at 3000 rpm. These values correspond to a rated electromagnetic torque of 6.8 Nm. Delivering this output requires a phase current of 5.3 A, and the drive permits short bursts up to 26.6 A for acceleration or shock loads. The winding resistance is 1.6 Ω, and the voltage constant is 0.103 V/rpm, so the controller can account for copper loss and back EMF during current regulation. These values help the connected inverter select suitable bus voltage and current sensing for stable current regulation.

Because the design relies on natural convection, enclosure fans are unnecessary and the standard encapsulation protects the winding varnish from vibration. During stall, the frame can hold 12.5 Nm of torque with only 8 A of stator current, a capability supported by its 1.28 Nm/A torque constant. Internally, copper and stator iron release 0.17 kW of heat, and the laminated stack weighs 5.9 kg. This thermal mass produces a 47.0 min time constant that helps slow rapid temperature swings during intermittent duty. That behavior is useful on indexing applications that alternate between short moves and dwell periods.