DC- Chopper

Robust and wear-free retrofit solution for light rail vehicles with DC motors

Technical Description

The DC-chopper was developed to offer a retrofit solution for trams and light rail vehicles with DC-motors with a high degree of flexibility and as little development effort as possible.The developed topology allows to realize all switchovers from driving to braking as well as at the change of driving direction with a wear-free modern semiconductor technology. The series resistor typically required for braking from high speeds is also controlled electronically.

The control of the power electronics and the drive control are done by modern control hardware from three-phase drives and include all operating and service functions according to state of the art, e.g. skid protection, acceleration control, fault memory, diagnosis.The separation into two single compact converter modules allows both modernization at device level and replacement of the individual converter modules within the existing device container.

Highlights

Significant reduction of LCC costs due to wear-free topology without contactor switching in motor circuits
Stepless armature current control and field weakening with separate actuators
Integrated brake actuator
Integrated filter capacity
Designed for typical performance of a traction bogie
Highly dynamic skid protection
Integrated acceleration control
Modern service and diagnostic software

Technical Data

Overhead line voltage (nominal)	DC 600/750 V
Armature current, max	850 A
Field current, max	850 A
Brake adjuster	Integrated
Series resistor switch	Integrated, electronic controlled

Communication	CAN
Control voltage	DC 24 V according to EN 50155

Communication und control

Mechanical Data

Dimensions (L x B x H)	620 mm x 600 mm x 300 mm Stator regulator 620 mm x 470 mm x 210 mm Field regulator
Weight	64 kg Stator regulator, 46 kg Field regulator
Cooling	Forced air cooling
Ambient temperature	-40 °C … +50 °C (vehicle environment)