Traction

Coolant Flow Rate

Monitoring coolant flow rate is critical for the safe and reliable operation of the traction chain. In many applications, differential pressure measurement at the inlet and outlet enables the reliable determination of coolant flow rate. The advantage of using a flow sensor is that a single sensor is sufficient and includes temperature measurement, offering benefits in integration cost and system design.

Pressure sensor

• Low temperature drift for precise measurement from ramp-up to full-load operation
• Usable at process and ambient temperatures up to 125 °C in nearly all liquid cooling circuits

Flow sensor

• Reliable, rugged calorimetric measuring method
• Mounting-position-independent measurement
• Integrated threshold generation on the flow value
• Integrated temperature sensor

Temperature Monitoring in Motors and Converters

Temperature sensor

• Superior accuracy for maximum motor efficiency
• Low drift providing high repeatability under every load condition
• Flexible mounting options to suit every application

Traction Control

Axle encoder

• High resolution for dynamic, precise speed measurement on the wheelset
• Bearingless design providing direct, backlash-free speed feedback
• Rugged, rail-compliant design (Category 3) for axle-end applications

Pantograph Contact Pressure Control

• Dynamic control of contact pressure on pneumatic pantographs
• High insulation resistance
• Various redundant design options through the use of two different sensor types (e.g. PP10R and PP20R)