Dynamic traction control

When it comes to controlling traction in electric motors, often only slightly resolved speed signals are available. This makes it more difficult to start on inclines, for instance. Thanks to integrated pulse multiplication, a high-resolution speed sensor from Lenord + Bauer enables much more dynamic control behaviour. Rolling detection, too, benefits from the greater number of pulses.

Speed sensor for traction control

Lenord+Bauer has developed a speed sensor for applications in which high demands are made on drive efficiency and driving comfort. In the GEL 2477, robustness and reliability have been combined with higher resolution. The energy consumption of the motor and the noise it generates can be reduced through torque ripple. This particularly pays off in situations where a high torque is demanded, enabling smooth start-up even under high loads or on inclines.

The company's sensors have proven their worth in traction systems of rail vehicles for decades. For traction control, the available force must be dosed very dynamically and sensitively in order to prevent the wheels from spinning. While standard speed sensors deliver one pulse per tooth, with the 2-channel sensor GEL 2477 the resolution of the internal analogue signals is increased by a factor of 2, 4 or 8 and a greater number of pulses is achieved. This allows a significant improvement in control accuracy even with smaller target wheels with few teeth. The proven HTL interface with square-wave signals has been retained, allowing the existing control systems to continue to be used without modification.
 

The GEL 2477 acquires the rotational speed and direction of rotation directly on the motor or gear. With a measuring range of 0 Hz to 25 kHz, it detects even the tiniest movements of the drive just as reliably as the maximum speed. The bearingless pick-up encoder is wear-free and long-lasting.

It is suitable for use wherever a robust yet high-resolution sensor is required. Areas of application in addition to traction control in rail vehicles include electric buses and industrial vehicles such as dump trucks and diggers.

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