“I think the current idea of electric vehicle manufacturing does not break away from the traditional vehicle concept, which leads to no gap between the performance of electric vehicles and traditional fuel vehicles, and can not give full play to the advantages of electric vehicles, so it can not meet consumer demand very well.” Meng Qinghua, professor of the Institute of Mechanical Design and Vehicle Engineering, School of Mechanical Engineering, Hangzhou Dianzi University, said when talking about the increasingly popular Battery electric vehicle, From the characteristics and development trends of various driving technologies, the use of hub motor drive is considered the ultimate driving form of electric vehicles.
Since 2016, Meng Qinghua has shifted his research direction from traditional fuel vehicles to new energy vehicles driven by wheel hub motors. With the support of the Zhejiang Natural Science Foundation, he has conducted research on “Control Technology Research Based on Dynamic Modeling of Four Wheel Hub Motor Driven Electric Vehicles under High Speed Operating Conditions” and conducted research on high-speed stability control methods for independent wheel hub motor driven electric vehicles.
Nowadays, the vast majority of electric vehicle chassis still use traditional car chassis, retaining components such as transmission shafts, universal joints, and drive axles, which fails to fully utilize the various technical advantages that electric motor drive should have. Compared to this, the biggest feature of hub motor drive is that it eliminates the clutch, gearbox, and drive axle of the car, simplifies the transmission system of electric vehicles, and has a more compact structure, reducing the weight and energy consumption of the entire vehicle Improved range after one charge
Meng Qinghua introduced that research has shown that electric vehicles driven by wheel hub motors can reduce energy consumption by approximately 15% and increase driving range by 10% to 30%. At the same time, the application of wheel hub motors in electric vehicles can achieve the goal of small horses pulling big cars. However, in order for electric vehicles driven by wheel hub motors to truly go on the road on a large scale, stability and safety issues need to be addressed.
Focusing on the two core issues of safety and stability of electric vehicles driven by hub motors, Meng Qinghua’s research team has established a series of models for electric wheel dynamics, independent suspension dynamics, electric wheel tire burst, and vehicle dynamics after nearly three years of exploration. Based on this, research has been conducted on the characteristics of hub motors, parallel immune PID control algorithms, and simulation and experimental studies have been conducted.
It is worth mentioning that the hub motor parallel immune PID control algorithm proposed by the research group innovatively refers to the immune mechanism of the Biological system, and combines the advantages of the artificial immune algorithm to achieve the control function of the electric vehicle. The research results contribute to the improvement of power performance, handling stability, and comfort of hub motor driven electric vehicles under high-speed operating conditions, and further promote their industrial development.
(Source: Zhejiang Online)