Product Description:

The MST201C-0010-FT-N0CN-D303 is a direct-drive rotary motor produced by Bosch Rexroth Indramat within the MST Synchronous Torque Motors series. Designed for low-speed, high-torque axes, the unit mounts directly to the load so mechanical transmission stages are eliminated. In industrial automation it supplies controlled rotational force for indexing tables, extruders, or winding stations where smooth torque at very slow speeds is required.

At its continuous operating point the motor delivers 105 Nm of rated torque while turning at 120 rpm, yielding a mechanical output of 1.32 kW. To produce this workload the stator draws a 5.2 A rated current, so drive sizing can be matched to modest RMS current demand. The 3-phase windings exhibit 193.0 mH inductance and 22.6 Ω resistance at 20 °C; these values lead to low ripple current and ease of control when coupled to a sinusoidal servo inverter. A torque constant of 20.19 Nm/A sets the proportional relationship between phase current and developed torque, allowing precise open-loop feed-forward commands. The voltage constant of 1.020 V/rpm identifies the back-EMF that the inverter must counteract during motoring.

For intermittent or start-up events the motor can reach 250 Nm of maximum torque while the drive may supply up to 12.4 A of peak current. During a complete stop the magnetic circuit maintains 125 Nm of standstill torque, preventing uncommanded motion on vertical or high-inertia loads. Heat generated at these elevated load points is managed by an integral cooling jacket that requires 3.2 l/min of coolant flow; maintaining this rate keeps winding temperature within class limits. Power conductors are connected through AWG 16 leads, which satisfy current density rules for the specified peak values. With the voltage constant held at 1.020 V/rpm the drive must furnish only moderate bus voltage, so low-speed precision is possible without a gearbox.