Not only car drives are electrified. Public buses with electric drives have long been driving through our cities. Manufacturers such as Mercedes-Benz Trucks are testing battery-powered trucks in plant-connecting delivery traffic. In Sweden, near Lübeck, near Frankfurt and in the Black Forest, large-scale tests are being carried out with electrically powered trucks, which draw their electrical energy from overhead lines on longer stretches of motorway, similar to trains.
With their higher performance and torque than passenger cars, however, electrified commercial vehicle drives place high demands on electromagnetic compatibility during development. In addition, the larger dimensions of the drive components require new test concepts. The right solution for these challenges comes from Mooser EMC Technik GmbH in Ludwigsburg. They developed the eCHAMBER® for EMC tests on powerful electric motors, transmissions, inverters, clutches, output shafts and axles in commercial vehicles.
The dimensions and performance of the measuring chamber are specially designed for the dimensions of drives in buses and trucks. This means: drive and braking power of several hundred kilowatts, voltages of up to 1000 volts and currents of up to 500 amperes can be displayed without any problems. Successful customer tests on hybrid transmissions with several hundred kilowatts of power and several thousand Newton meters of torque for trucks with a total weight of more than 7.5 tons have confirmed the system concept.
All components of commercial vehicle e-drives could be easily tested for their electromagnetic compatibility. One of Mooser’s specialties is measuring the through-coupling of EMC interference through the drive train – from the electric motor through a mechanical transmission to the axles.
The eCHAMBER® is not only specially designed for commercial vehicle dimensions, but also designed according to the latest technical standards. For example, like all test facilities from Mooser, it meets the requirements of DIN EN ISO/IEC 17025. This standard is primarily concerned with the reliability and quality of methods. This ensures that Mooser determines technically competent laboratory results for all measurements relating to the topic of commercial vehicle EMC and thus ensures their international acceptance.
