Bosch Engineering presents a newly developed high-performance solution for batteries with voltages up to 800 V, further expanding the range of applications for construction equipment.
Designed for construction equipment, the 800 V system consists of the Bosch SMG230 electric motor and a high-efficiency inverter equipped with silicon carbide power modules. The motor is designed for system voltages between 400 and 850 V. In an ideal voltage and temperature range, it delivers continuous power of up to 200 kilowatts and torque of about 250 newton meters. In the short term, up to 550 newton meters of peak torque can be delivered.
With 800 V technology, power density has also been greatly increased. The new motor delivers up to 80 kilowatts more power than a similar 400 V machine with the same weight or, for the same performance, boasts more compact size and much less weight. The 800 V inverter with silicon carbide semiconductors, which has been tailored to the specific requirements of the SMG230, boasts an efficiency of more than 99 percent. The silicon carbide semiconductors in the power modules enable steeper switching operations, which means that significantly less energy is lost as heat.
Bosch Engineering’s electrification components for construction equipment are designed to be extremely robust, reliable and durable. The safety and diagnostic concpt is based on established automotive standards and has been adapted to the specific requirements of mobile machines. The compact dimensions allow easy integration even in tight installation spaces, which means that even existing device platforms can be converted with relative ease. In addition, Bosch Engineering assists its customers in integrating the drive system into their machinery and in the actual application of the system.
“The latest generation of our powerful electric drive system combines high power density, compact dimensions and optimal efficiency. As a result, even construction machinery with high power requirements and limited installation space, such as wheel loaders, can now be equipped with electric drives,” said Philipp Kurek, head of off-highway and marine solutions at Bosch Engineering. The increased overall efficiency translates into a reduction in the total cost of ownership (TCO) of the construction machine throughout its life cycle. Depending on the type of application, electrification thus also offers potential economic advantages over hydraulic drives.
In addition, Bosch Engineering’s electrification solution offers great flexibility in combination with Bosch Rexroth’s customized transmission solutions, such as the new eGFV9100 coaxial transmission.
