Because the motor is separated from the wheels and there are no tires on the outer layer, the heat dissipation efficiency of the motor can be greatly improved. Therefore, even if it is high-speed and long-distance, it will not easily drop the speed.
One different: different driving methods
The hub motor is usually installed inside the hub drum of the rear wheel, and the coil is directly installed inside the wheel. After the power is turned on, the motor converts electrical energy into mechanical energy, which drives the rear wheel to rotate, thereby driving the vehicle forward. Simple and crude but effective.
The central motor usually drives the rear wheels through a chain or gear drive to drive the entire vehicle forward. Normally, a central motor with the same power can amplify the output torque with the help of a mechanical structure.
Because the wheel hub motor is directly mounted on the wheel, some heat will inevitably be generated during the operation of the motor. Due to the tire package on the outside, when the temperature rises to a certain level, the motor will continue to "lower frequency" when it continues to run In other words, the speed cannot be improved, so the electric motor with a wheel hub motor usually cannot be high speed for too long, and is not suitable for long-distance operation.
Because the motor is separated from the wheels and there are no tires on the outer layer, the heat dissipation efficiency of the motor can be greatly improved. Therefore, even if it is high-speed and long-distance, it will not easily drop the speed.
Because of the installation location, the wheel hub motor is subjected to greater pressure during rear shock absorption, and frequent vibrations are also detrimental to the motor. Too strong vibrations can also damage the motor. If you want to increase the power of the wheel motor, the requirements for the material of the vehicle and the rocker arm are higher.
The center of gravity of the center-mounted motor is in the middle of the vehicle. Because the motor does not directly contact the ground, it is transmitted to the motor through a shock absorber during vibration. The power of the central motor can be very large.
In comparison, a seemingly perfect mid-mounted motor is not completely without disadvantages, and the biggest disadvantage is of course "expensive". In low-speed commuting, electric vehicles with wheel hub motors are more suitable and cost-effective. The mid-motor electric car is born for sports. After all, from the performance of the whole car to the structure, it is almost the existence of a motorcycle. Its speed and driving feeling are close to that of a motorcycle.
Senlan Z1 pole-engraved luxury version, in addition to using a high-power (1500W, 72V / 26Ah) mid-mounted motor, also used a lightweight high-strength cradle frame on the vehicle structure, thickened the center rear shock, racing Level front and rear disc brake systems, etc. In the transmission mode, the most efficient belt transmission is also used. Its transmission efficiency can reach more than 94%. It has a constant transmission ratio and smooth transmission. This also makes the handling performance of the vehicle very good.