What is the commonly used drive motor for domestic new energy vehicles

Pacific Automotive Network's current mainstream drive motors are centralized, wheel-edge and hub-type three forms, are currently permanent magnet synchronous motor technology, the difference is only that the motor is mounted on the vehicle in a different location.

1, centralized drive motors: centralized drive motors are most similar to traditional axles, and must pass through transition parts when driving wheels, such as reducers, drive shafts and so on. At present, most of the low-speed electric vehicles are basically this kind of structure, mainly this kind of structure is the most simple and cheap. And these low-speed electric vehicles have a problem is generally omitted transmission. This brings a problem, that is, the start or hill climbing when the low torque is not enough; and then the relatively large size, transmission efficiency is not high and other shortcomings.

So many models simply use dual-drive motors to make up for the lack of power, which is why the proportion of four-wheel drive in new-energy vehicles is much higher than that of traditional cars, and also explains why many of those Internet-built vehicles debut models are mostly SUVs.

The mainstream of the current market is centralized drive motors + traditional axles, which is because of its structural characteristics, traditional axles can be matched with a little modification, so it can reduce the research and development of a very large.

2, wheelside drive motors: wheelside structure requires at least two drive motors, of course, may be more. The two drive motors are arranged on both sides of the axle, and drive individual wheels by means of side gearboxes and wheelside gearboxes to realize deceleration and torque increase. The wheelside motors may or may not require drive axles, which is where it differs from centralized drive motors.

But compared to the centralized type, the wheelside type on the chassis arrangement of the car is significant, especially in the case of rear axle drive, the traditional sedan because of a long driveshaft to the front transmission power to the rear wheels, will be due to the deformation of the body and the wheels between the movement of the body to produce a very much more impact, but the wheelside drive motor can be mounted directly on the side of the wheel, and therefore do not need to consider too much torsion resistance. This makes it possible to make the chassis very flat and the body more versatile.

3, hub drive motor: simply put, the hub motor is all things installed in the hub, such as drive motors, gearboxes, etc. in the hub directly drive the wheels, in fact, this is currently the most common form of drive, basically every family has a battery car after the drive wheel is this structure. Its biggest advantage is that the structure is compact, eliminating the differential, half shaft and variable device. At the same time, because of the less mechanical loss of these structures, the corresponding increase in transmission efficiency.

(Photo/writing/photo: Pacific car network Q&A caller)