Product Description:

The MST530E-0010-FT-N0CN-NNNN is a frameless synchronous torque motor created by Bosch Rexroth Indramat for the MST Synchronous Torque Motors series. This direct-drive unit is intended for industrial automation axes that need high continuous torque at very low rotational speed. By eliminating mechanical gear stages, it can improve positioning accuracy and reduce drivetrain backlash. Its frameless form also allows the active motor components to be integrated directly into the machine structure instead of relying on a conventional housed motor and coupling assembly.

Under continuous duty, the motor delivers a rated mechanical output of 19.8 kW at a shaft speed of 90 rpm and a steady electromagnetic load of 2100 Nm. Electrical input at this operating point is limited to 64 A, and the torque constant of 32.80 Nm/A at 20 °C provides a predictable current-to-torque relationship. This operating range suits low-speed rotary axes that need strong continuous torque without reduction gearing. The housing diameter is 565 mm, and the single hybrid cable has an outside diameter of 25.5 mm with 16.0 mm² power conductors and 1.5 mm² control cores routed to the drive. A winding resistance of 0.59 Ω helps limit copper losses, and the cable layout allows direct connection without separate feedback lines.

For short-term overload, the motor can reach 4700 Nm, while the inverter may supply up to 212 A during acceleration or load shocks. This reserve supports brief peak-demand events while normal operation remains centered on the continuous-duty range. Thermal stability is supported by an internal cooling jacket that is 210 mm long, and it requires 9.5 l/min of coolant to control copper and lamination temperatures. The phase inductance is 7.5 mH, which helps smooth current transitions under vector control. The hybrid cable passes through the same jacket region, which helps reduce local heating around the conductors and insulation during sustained low-speed operation.