What is the difference between an electric car hub motor and an electric bicycle hub motor?
Compared with electric bicycle hub motor, automobile hub motor has higher power and torque. The biggest difference is on the control system. Bicycles are two wheels, but the car has four, to solve the problem of speed and synchronization problems, this is the biggest problem.An electric bicycle with a hub motor can have electromagnetic resistance when riding without electricity, and an electromagnetic clutch can be reduced by using an on-off mechanism. A clutch mechanism can also be used to adjust the gear to speed ratio.
Advantages of the motorOmit a large number of transmission parts to make the vehicle structure simplerFor the traditional vehicle, clutch, gearbox, transmission shaft, differential and actuator are essential, and these components not only light weight, so that the vehicle structure is more complex, there is also need regular maintenance and failure rate problem. But the wheel motor is a good solution to this problem. In addition to the simpler structure, vehicles with hub motors can achieve better space utilization and drive efficiency.Folding can achieve a variety of complex driving methodsBecause of the characteristics of a single wheel motor with independent wheel drive, so whether or four-wheel drive drive form precursor, after it can be easily realized, AWD drive in wheel motor vehicles is very easy. At the same time can pass around the wheel hub motor at different speed or even reverse similar implementation of differential tracked vehicle steering, greatly reduce the turning radius of the vehicle, under special circumstances can almost achieve the steering (but now wear on the vehicle steering mechanism and the tire is large), is very valuable for special vehicles.
Easy to adopt a variety of new energy vehicles technologyMany new energy models are powered by electricity, so the wheel motor drive has come in handy. Whether it is a pure electric and fuel cell electric vehicles, or extended range electric vehicle, can be used in wheel motor as the main driving force; even for hybrid models, can also be used as motor starting or rapid acceleration of the power, it is the use of a machine. At the same time, many technologies of new energy vehicles, such as braking energy recovery (i.e. regenerative braking), can also be easily implemented on hub motor drive models.Disadvantages of hub motorsIncreasing the mass of the spring and the rotating inertia of the hub affect the handling of the vehicleFor ordinary civil vehicles, the relatively lightweight materials, such as aluminum alloy, are used to make suspension parts to reduce the quality of the spring and to improve the response speed of suspension. However, the wheel motor increases the quality of the spring more greatly, and at the same time increases the rotary inertia of the wheel hub, which is disadvantageous to the control performance of the vehicle. However, this is not the biggest drawback, considering that electric vehicles are mostly limited to walking instead of driving power.
