Dynamic and efficient traction control

For traction control in electric motors, often only low-resolution speed signals are available. This makes starting on inclines, for example, more difficult. A high-resolution speed sensor from Lenord+Bauer enables significantly more dynamic control behaviour thanks to integrated pulse multiplication. The roller burnishing detection also benefits from higher pulse numbers.

Lenord+Bauer has developed a speed sensor for applications in which high demands are placed on drive efficiency and driving comfort. Robustness and reliability have been combined with higher resolution in the GEL 2477. By using the wear-free sensor, the energy consumption of the motor and its noise development due to torque ripple can be reduced. This pays off especially in situations where high torque is required. Even under high load on inclines, jerk-free starting is possible.

The company's sensors have proven themselves in traction systems of rail vehicles for decades. In traction control, the available power must be dosed very dynamically and sensitively in order to prevent the wheels from spinning. While commercially available speed sensors supply one pulse per tooth, the GEL 2477 2-channel sensor uses the high resolution of the internal analogue signals to increase the output pulses by a factor of 2, 4 or 8 compared to the input frequency.

Even with smaller gears with few teeth, the control accuracy can be significantly increased. The proven HTL interface with square-wave signals has been retained so that the existing controls can continue to be used unchanged. Commercially available speed sensors can be replaced without mechanical adaptation of the flange pattern.

The bearingless pick-up sensor detects the speed and direction of rotation directly at the motor or at the gearbox. With a measuring range of 0 Hz to 25 kHz, it detects the smallest movements of the drive just as reliably as it detects that the maximum speed has been reached.

It is suitable wherever a durable and at the same time high-resolution sensor is required. In addition to traction control in rail vehicles, applications include electric buses and industrial vehicles such as dump trucks and excavators.