Suburban trams are typically high-floor LRVs, accessible via platforms at stops. Since the distance between stops is longer, the trams can run at higher average speeds, making selfventilated cooling concepts more favorable than with inner-city trams.
Trams operating in suburban areas often run on separate tracks – away from other traffic such as cars and buses – where there is less pollution. An open cooling concept can therefore be used, in which the rotor losses are more effectively dissipated.
The high floor solution provides a more generous space envelope for the motor and gearbox, making it possible to use less complex components.
For suburban trams operating on separate tracks, ABB offers open traction motors, which allow for a more demanding mission profile, a more compact motor – or both.