Deutsch English TSA Traktionssysteme Austria GmbH Products Rail Road Service Technology About us References Newsroom Career You are here: Home Cooling concepts COOLING CONCEPTS Our cooling concepts are as individual as our customers Since electric motors offer extremely high power and torque density (compared to classic industrial motors), cooling plays a key role in keeping machine temperatures low and ensuring a long lifetime. TMW: Liquid cooling The motors are totally enclosed and cooled by a water jacket, located on the stator’s outer surface. The coolant is usually a mixture of water and antifreeze. The motors may be equipped with an additional inner air circuit to provide rotor cooling. Liquid cooling is also common for permanent-magnet synchronous motors as well as for asynchronous machines. Pros: Noise level kept to an absolute minimum (no fan) Cooling continues even when the vehicle is not in motion No ingress of dirt or water Low maintenance Cons: Additional installations for cooling circuit required (pipes, pumps, heat exchanger) Limited power density due to low rotor cooling TMF: Air-cooled, open design, forced ventilation Airflow is provided by an external blower, usually situated inside the vehicle and guided to the traction motor via air ducts. The cooling air enters the interior of the motor, directly cools the winding head, then flows through axial cooling holes in the stator and rotor’s sheet metal package to the other side, cools the winding head again and finally leaves the machine through a grid. Pros: Highest possible airflow and direct cooling to allow maximum power density Cooling is independent of actual motor speed, hence, airflow can be controlled depending on actual motor temperature Cons: External blower required Air ducts need additional space TME: Air-cooled, open design, self-ventilated Airflow is generated by a fan directly attached to the motor’s shaft. The cooling air enters the interior of the machine through coarse metal-sheet filters, is drawn over the winding head and through the stator and rotor holes (similar to the forced ventilation concept), passes the fan and leaves the motor in radial direction. Pros: Simplest and cheapest cooling concept, no additional installations required Direct cooling of windings and rotor Cons: Due to fan noise, maximum motor speed is limited Poor cooling at standstill or low speed Intrusion of water and dust Metal filters require maintenance (cleaning) You want to have the best traction drive for your vehicles? Get in touch! Traktionssysteme Austria GmbH Brown-Boveri-Str. 1 2351 Wiener Neudorf Austria +43 (0) 2236 8118-0 +43 (0) 2236 8118-237 office@tsa.at www.tsa.at About us Contact Career Newsroom Downloads Products Traction Motor Traction Alternator Gearbox Traction Drive Home Contact Downloads Imprint Privacy policy Privacy settings We use cookies on our website. Some of them are essential, while others help us to improve this website and your experience. Essenziell Statistiken Marketing Externe Medien Accept all Save Individual privacy settings Cookie-Details Privacy policy Imprint