St manufacturer of Italy France Semiconductor Co., Ltd. provides vehicle specification level MCU to Huawei


In mid May, Huawei first supplied motor controllers to the euniq series of SAIC’s mass-produced models, which attracted the attention of people in the automotive electronics industry. The motor controller provided by Huawei can adjust motor torque and output control with high accuracy of 3%. After the joint adjustment of SAIC Maxus and Huawei, the acceleration performance of euniq series pure electric version models is less than 5 seconds at 0 ~ 50km / h. Excellent performance comes fromMCU of vehicle gauge levelAs well as Huawei’s technology in motor controller.


The successful supply of SAIC euniq series of mass production vehicles shows that the layout of Huawei’s in vehicle machine system was started long before Huawei and St announced cooperation. Italian French semiconductor MCU manufacturer with strong strength in the field of automobile chips was already a partner of Nissan, Audi and Sila at that time, which was required by Huawei. From making motor controller scheme for SAIC to now, Huawei and STMC have completed a complete cooperation work of vehicle specification level MCU.


Where is the breakthrough of MCU microcontroller technology?


Huawei chose to cooperate with Italian French semiconductor in the field of vehicle control instead of domestic MCU manufacturers. The key reason is that at present, there is no original vehicle size MCU manufacturer that can achieve mass production in this field. At present, the MCU in the motor controller is made by foreign manufacturers, because the requirements for the drive motor controller of the whole vehicle are too strict. According to the current level of domestic vehicle specification level MCU, we can not find the MCU supplier of the whole vehicle drive motor.


The strict performance requirements of MCU are mainly related to the working conditions of the drive motor controller. The drive motor controller plays a pivotal role in connecting the high-voltage components in the distribution of high-voltage electricity, and also connects with other controllers such as the body controller, so as to realize the communication and contact of the key control system of the vehicle. In the aspect of electric signal conversion, the electric control MCU can realize the AC / DC bidirectional conversion and frequency conversion, change the DC power of the battery into AC drive motor, and some vehicle models also need to be able to convert AC to DC when braking, so as to reverse charge the battery. In addition, the controller realizes the high-low conversion of motor speed through frequency conversion.


In a word, motor controller is the high-voltage power distribution hub, core power control and conversion unit of new energy vehicles, which is related to vehicle power and power safety. The motor controller has various functions, complex design, and to meet the harsh working conditions required by the vehicle factory. It can be imagined that this has put forward great requirements for the calculation power and reliability of the driving motor MCU.


Generally, the design life of MCU controller at vehicle gauge level is 15 years or 200000 km. The reliability of automotive electronics is the primary consideration. Under the condition of ensuring reliability, the balance between reliability and MCU calculation force is re integrated.


In the vehicle drive motor controller, it involves more complex multi-channel can bus and more information processing of other controllers. In addition to safety and reliability, it also requires higher computing power of MCU, which requires higher computing power core and more advanced manufacturing technology. In this respect, there is a big gap between domestic manufacturers and foreign manufacturers. Huawei and Italian French semiconductor manufacturers cooperate in the layoutAutomobile MCUHowever, for domestic MCU manufacturers, there are many challenges to occupy a place in this field.