Explain the technology of automobile wheel hub motor
Wheel hub motor technology, also known as wheel-mounted motor technology, is characterized by the integration of power, transmission and braking devices into the hub, thus greatly simplifying the mechanical part of the electric vehicle. Wheel motor technology is not new. As early as 1900, Porsche first produced electric vehicles with front wheel wheel motors. In the 1970s, this technology was applied in mining trucks and other fields. For the hub motors used in passenger cars, Japanese manufacturers have carried out earlier research and development of this technology, and are currently in a leading position. International auto giants including General Motors and Toyota have also been involved in this technology. At present, domestic auto brands have begun to develop this technology.
For conventional vehicles, clutches, transmissions, drive shafts, differentials and even transfer cases are essential, and these components are not only lightweight, but also make the structure of the vehicle more complex, and also require regular maintenance and The problem of failure rate. However, the hub motor solves this problem well. Under the premise of meeting the current space requirements, the vehicles driven by the hub motor in the future can be made smaller in size, which will help people improve congestion and parking in the city. . At the same time, the independent hub motor is more flexible in driving the vehicle, enabling functions or driving characteristics that are difficult to achieve with conventional vehicles.
The hub motor just increases the unsprung mass to a large extent, and also increases the moment of inertia of the hub, which is detrimental to the handling performance of the vehicle. In addition, the working environment of the hub motor is harsh, facing the influence of water, dust, etc., and also has high requirements in terms of sealing. At the same time, it is also necessary to separately consider the heat dissipation problem for the hub motor.
At present, Ford Motor Company and auto parts manufacturer Schaeffler are jointly developing wheel hub motor drive technology, and they will use this technology to build the first "rear wheel drive" carnival.
