
SAM Elektrische Antriebstechnik GmbH
Emotron VFX – Liquid-Cooled Frequency Inverter for Synchronous Torque Motors
The Emotron VFX in liquid-cooled configuration (LC) is the ideal drive solution for operating high-pole synchronous torque motors with permanent magnets. As the powerful core of modern direct drive systems, it combines precise control with a compact design and maximum efficiency.
Thanks to field-oriented vector control (FOC), the inverter delivers full torque from standstill – without gearboxes, without mechanical wear. Combined with a water-cooled synchronous torque motor, the result is a drive system that achieves the highest power density with minimal footprint. The overall system efficiency significantly surpasses conventional drive solutions using asynchronous motors and gearboxes.
The liquid cooling of the inverter enables compact installation even in confined control cabinets and demanding industrial environments – the IP54 protection rating reliably shields against dust and water spray. Mains harmonics are limited to THDi < 5 % by active front-end technology (AFE), avoiding costly overdimensioning of cables and transformers.
The PROFINET interface enables seamless integration into higher-level control architectures. Safety functions such as Safe Torque Off (STO) are included as standard. Available for power ratings up to the MW range, the system is suited for presses, extruders, mixers, shredders, and other heavy-industry applications where precise torque, high availability, and energy efficiency are decisive factors.




