In September 2020, UAES[Robert Bosch China's joint venture]'s first self-developed electric bridge product EAU100 was successfully rolled off the Taicang plant, which marked the start of mass supply of UAES's first electric bridge customer project. The maximum output power of this product is 105kW and the peak torque is 2,200NM.
What is EAU?
EAU is a bridge platform product independently developed by UAES for the Chinese market. It adopts an integrated design and highly integrates the drive motor, power electronic controller and reducer to provide a more compact product solution. EAU adopts a platform design concept, peak power covers 80-200kW, efficiency exceeds 93%, and can be configured with electronic parking function. It has a three-layer functional safety architecture with a functional safety level of up to ASIL D. At the same time, it introduces several new functions design.
Excellent performance, safe and reliable
EAU adopts a modular design, applying the latest controller technology, UAES self-packaged power modules, and self-developed pin motor platform. After a systematic development and design method, the performance of the electric bridge is greatly improved to meet the requirements of various levels of models. Performance requirements. In terms of efficiency, through the optimization of the system scheme and the improvement of the control strategy, the use of frequency conversion, overmodulation and other technologies have further improved the efficiency of the electric bridge. The maximum efficiency of the product exceeds 93%, which helps increase the vehicle's mileage and reduces battery pressure.
From the initial stage of development, the NVH design simulation and optimization are carried out from the system level, and the noise is controlled through software means such as harmonic injection to ensure that the bridge has excellent NVH characteristics throughout the entire speed range.
EAU relies on the UAES functional safety development system, adopts a three-layer functional safety architecture, and can support up to ISO26262 ASIL D safety level requirements. Through the cooperation of software and hardware functions, chip monitoring, emergency power supply and other design methods are adopted to ensure that the vehicle can still be in the designated safety mode under extreme conditions (such as collisions, loss of low-voltage power supply, etc.), thereby ensuring the safety and torque of the vehicle. High voltage safety.
Fit the market, powerful function
EAU fully considers the needs of the Chinese market and has upgraded its products during the initial stage of development, introducing a number of new features, including:
The integrated electronic parking system, whose control part is integrated in the motor controller, and the actuator integrated in the gearbox, supports customers' independent selection.
Integrating the thermal protection function of key components of the electric bridge, by establishing thermal models of power modules, motors, reducers and other components, online real-time calculation of device temperature, realizing dynamic derating protection, and ensuring the safe output of the drive system.
Support big data remote diagnosis function.
Support remote refresh etc.
More advantages, more benefits
Compact design, smaller volume, easy for customers to design the vehicle front and rear drive envelope design.
Modular design supports customers to choose or customize electric bridge products of different power levels according to different power requirements of the vehicle.
Lightweight design, EAU100 weighs 59kg.
Equipped with CAN FD and high-speed CAN communication to meet the different needs of customers for CAN electrical architecture
Localized project team, quick response to customer project batch production progress
UAES's EAU platform can provide services for various levels of vehicles based on products of different powers. At the same time, United Electronics will continue to iterate based on market and customer needs, provide customers with high-quality products and services, and lead China's automotive drive technology.