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IGBT chopper drive equipment for TIMIS 2 tram

Technical Data  
Rail gauge 1000 mm
Maximum speed 60Km/h
Acceleration 1m/s2
Deceleraton 1,3m/s2
Input voltage 750VDC(+20%;-30%)
Car body length 26.008 mm
Car body width 2.373 mm
Car body height 3.196 mm
Weight 30.500 Kg
Seating 70+1
Standing 89(6 pers/m2)
Wheel diameter 680/600 mm
Gear ratio 5,63:1
Tractions motors 2 mot. tip TN 71
Caracteristics 150KW; 750VDC; 350A; 1650rpm
Traction control chopper with IGBT
Type 2xECH-150K-750
Input voltage 750VDC(+20%;-30%)
Output 150KW
Construction modular
Location at the back of tram
Cooling forced ventilation
  • - IGBT-technology
  • - no jerks when starting and braking
  • - combined regenerative and rheostatic brake
  • - control signal: receivers for fibre optics
  • - protections: overtension, shortircuit, overtemperature
Control unit analogic
Type SCCH-24
Construction DE electronic plug-in unit
Cooling natural convection
Supply 24VDC (+/- 20%)
Caracteristcs - control signals for IGBT: transmitter for fibre optic
Auxiliary power supply static converter
Type CST-5/750
Nominal output power 5KVA
Input voltage 750VDC(+20%;-30%)
Output voltage 24-30VDC adjustable
Maximum output current 180ADC

The tram is driven by two DC series excitation motors developing an active couple proportional to the current value through the motor. The current average value by the traction motors is assigned by the travel pedals and it is maintained at this value by the regulating diagram.

The equipment for the tram drive with the help of IGBT choppers progressively passes the supply means tension to the traction motors which transform it in a mechanic energy at the tram wheels at the same time being monitored by motors not to exceed the maximum permissible values.

By breaking, the current assignment is done by the braking pedal but the electronic plug-in unit maintains the current at this value by motors and the voltage in the intermediate diagrams is maintained within the permissible limits. In this regime the motors work as generators. The braking is regenerating if the circuit permits (trams are in running), otherwise the braking is rheostatic but also at a prescribed braking current.

The electronic control plug-in unit avoids the indecision that should appear by the simultaneous depressing of the two pedals (travel and braking) by the priority to the brake. After the braking pedal returns in “STOP” position the travel regime resume is possible by actuating the travel pedal.

The reverse of the travel (reverse travel) is done from the tram driver’s cab but only when the vehicle is stopped.In this regime the run maximum current is limited at 50% of the forward run current (the maximum speed of the tram for the reverse travel is 30 km/h).

For all the running regimes (forward travel, reverse travel, braking) the contractors of the electric mains are disconnected at a minimum current thus avoiding their wear.

Both traction motor drive choppers as well as static converter for auxiliary power supply are achieved in IGBT technology.