Solaris Tramino

Cutting, bending and connecting of the all steel construction of the car body is performed by Solaris using up-to-date laser-cutting machines, CNC-bending machines, CNC-milling machines and partially by welding robots. Weight optimized side wall and portal structures are being assembled from opened profiles. After welding, corrections and measurements are completed, the car body shells are sandblasted and primed, while the closed profiles receive a special interior protection.

The main roof elements are pre-fabricated aluminium-hardfoam sandwich structures, which are glued to the steel structures of the car bodies after pre-assembly of cabling and HVAC ducts. Likewise all windows as well as all outside sheeting are glued flush with the steel structure. The result is a straight exterior surface with a notably high level of quality.

The interior receives sound and temperature insulation before installation of easy-to-clean and visually attractive plastic elements. The whole underside of the tram is coated with a thick-layer elastic protection paint to ensure additional noise dampening. All materials used fulfill all relevant fire protection norms.

The five body sections are connected with three turning hinges and one turning-pitching hinge, which together with the secondary suspension ensure that the body structures are not loaded with torsion forces resulting from unsuitable track conditions.

In order to achieve effective heating and ventilation both passenger compartment and driver’s cabin are equipped with individual air conditioning systems. Additional fans and heaters, automatically controlled by the HVAC system plus a number of tilting windows contribute to a pleasant passenger experience.

Drivers enjoy individually adjustable seats and good visibility. All controls are easily accessible for drivers within the 5/95 percentile, with key functions grouped on touch-screens.

Classic axles, rubber-suspended wheels and externally-longitudinally mounted motor-gearbox-units of the motor bogies allow for a passenger compartment without steps. In combination with primary and secondary suspension, an extended life vehicle time plus good riding characteristics even on relatively bad tracks are guaranteed.

The mechanical connection of the bogies to the body shell underframes is accomplished by a traction rod, shock absorbers plus rubber end stops to limit the turning angle. This concept allows for a defined turning angle while keeping shocks and vibration away from the body shells.

Electro-hydraulic spring-loaded brakes, working as a parking brake, plus two magnetic rail brakes per bogie support the electro-dynamic brake system in critical situations.

In case of malfunctions the spring loaded brakes can be released either by the driver by actuating a push-button or by applying a hand pump locally. This allows for quick reactivation of the tram to avoid service disruptions.

Traction inverters, static converters, brake resistors, battery set, pantograph and fast switch are located on the roof of the tram. Each of the four 105 kW asynchronous traction motors is fed and controlled by an individual traction inverter module.

The Tramino Poznań is fully prepared for future installation of supercapacitors, which allow the amount of energy supplied from the overhead power supply to be reduced.

Traction equipment, doors, brakes, HVAC, lighting systems and control elements are connected by a CAN open bus system, which allows for efficient vehicle diagnostics.