3. Develop mechatronic integration process
The drive motor system must meet the requirements of the powertrain integration, and support the serialization of the entire vehicle product and the scale of production. The development and progress of Toyota Motor's drive system THSII and Honda's IMA system fully demonstrate this. The THSII has been extended to a wide range of models including the Lexus, and the IMA has been deployed in a variety of models including the Civic and Accord. The integration of the vehicle drive motor system is mainly reflected in the continuous integration of the mechatronics integration of the motor and the engine, the motor and the gearbox, and the motor and the brake system. The development of hybrid engine and drive motor integration has evolved from structural integration to control integration to system integration. As the electrification ratio of automotive power is getting higher and higher, the electromechanical coupling powertrain system with different coupling depths makes the connection between the motor and the gearbox more and more tight. In the field of high-performance electric vehicles, the new design and development of the undercarriage system, braking system and gear train will enable the integrated integration of the motor and the power transmission. Mechatronics is not only the integration of technology, but also the integration of electromechanical structures. The continuous development of the mechatronics integration process requires that the gearbox manufacturer and the motor company cooperate with each other. It is compatible with the motor interface on the basis of the original traditional gearbox, and even designs a special mechatronic gearbox to combine the two.
4. Increase the integration and digitization of the control system
The degree of integration of vehicle electric drive control systems is also increasing. The integration of motor controllers (DC/AC), low-voltage DC/DC converters, and bidirectional high-voltage DC/DC converters is becoming a trend. High-speed, high-performance microprocessors enable electric drive control systems to enter the era of full digitalization. On the basis of high-performance, high-speed digital control chips, high-performance control algorithms and complex control theory are realized, which greatly improves the performance of the motor and its control system. At the same time, user-oriented visual programming, through code conversion and download directly into the micro-processing, continuously improve programming efficiency and debugability.
5. Develop electric drive system industrial cluster
At the same time as domestic technology development and research and development of samples have made breakthroughs, the motor system is moving towards industrialized multi-variety and small-scale large-scale production. At this stage, it is necessary to specifically solve the process and engineering problems of multi-variety and small-volume flexible production. The above figure shows the relationship between the cost of the drive motor system and the market demand. Large-scale production reduces the cost of a single set according to the ratio of 90-95%, so it is necessary to solve the problem of batch production capacity and quality system certification. In the future, there will be an independent new supplier of automotive electric drive systems in China, supporting electric vehicles and the traditional automobile industry, and a new industry for automotive electrical automation is gradually taking shape.