Bosch Engineering unveils 800-volt electric drive for tractors
The 800-volt drive system comprises the Bosch SMG230 electric motor and a highly efficient inverter featuring silicon carbide power modules. The motor is designed for system voltages between 400 and 850 volts and achieves a continuous power of 188 kilowatts with approximately 250 newton metres of torque.
It can deliver up to 550 newton metres of torque for short periods. Bosch states that the 800-volt design increases power density, providing up to 80 kilowatts more than a comparable 400-volt system of the same weight, or reduced weight at equivalent power.
The inverter uses silicon carbide semiconductors that enable faster switching and reduced energy loss in the form of heat. Bosch reports an efficiency level above 99 per cent for the inverter. The safety and diagnostic system is based on established automotive standards, adapted for mobile machinery. Bosch Engineering provides support for system integration and application development in agricultural vehicles.
The supplier stresses that the electric drive can be integrated into existing machine platforms. Moreover, it can be applied to purely battery-electric systems for small and medium agricultural vehicles or as part of hybrid solutions for larger machines.
According to Bosch, the drive system can be combined with transmission solutions from Bosch Rexroth, including the eGFV9120 coaxial gearbox, which is also on display at the trade fair in Hanover, Germany. The company also states that the design allows improved overall efficiency and reduced operating costs.
“Our powerful new electrification solution combines high power density, compact dimensions, and optimum efficiency. Its impressive flexibility makes it the perfect choice for the electrification of all types of agricultural machinery,” said Philip Kurek, responsible for off-highway and maritime solutions at Bosch Engineering.
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