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Four DC traction motors are supplied with 400 VAC out of the university’s three-phase electricity network via thyristor-controlled converters. The main braking is done with a combined regenerative/rheostatic brake that feeds the energy back into the power supply system for accelerating and/or powering the other vehicles.


The maximum power consumption of a vehicle is approximately 225 kVA.

The dual axle running gear sets are equipped with hard rubber tires which move on the two lower sections of the guideway and permit very low noise rates. They are guided by small side mounted wheels.

Heating for the running gear is not necessary because it is located weather protected inside the guideway beam.

Technical details of the propulsion system

Second Generation Propulsion System

The propulsion system of a vehicle consists of two independent, redundant units which in turn have two parallel connected motors. In case of failure of one system, the journey can be continued up to the final stop

Operating voltage
3 x 400 V, 50 Hz
Nominal power of motors
4 x 31,5 kW
Range of revolutions per minute
0..3290 U/min
Nominal torque
4 x 90 Nm
Nominal propulsive force
8,4 kN
Maximum propulsive forc
16,8 kN
Regular acceleration
1 m/s²
Regular deceleration
1 m/s²
Emergency deceleration
> 1,5 m/s²
Nominal speedt
13,9 m/s (50 km/h)
Positioning accuracy
± 3 cm
Noise level (measured at 50 km/h in 25 meter distance)
< 65 dB/A