Tesra Model3 released performance data display, its standard version of 100 kilometers acceleration time is 5.6 seconds, with respect to the 100 kilometers of the teeng 400 for 14 seconds, enough for 8.4 seconds, the highest speed 209 km / h, far more than Teng 150 km / h of the potential 400, which is critical to the ultimate driving experience on the highway, Tesla Modle3 has such a high power performance, closely related to its three-phase induction motor.
1, why is Tesla use three-phase induction motor?
Electric vehicle dynamic performance is embodied in two aspects of the maximum speed and 100 kilometers, which is determined by the motor output power, and the motor output power is determined by the speed and torque, Tesla uses three-phase induction motor, the three-phase communication asynchronous motor, The high speed of over 10,000 revolutions can be achieved by ultra-high voltage and weak magnetic drive, and the motor can be achieved by driving the motor control system such as drive inverter, thereby ensuring the high power of the Tesla motor, thus Improve Tesla power performance (this article is original, cats and car debut, please indicate please indicate).
2, three-phase induction motor?
Although the three-phase induction motor has a large output power, there is also an advantage of working temperature difference, but there are also three major levels of insufficient, first in high-speed operation, there is a rotor fever, waste energy and heat dissipation, which is for electric vehicle life and Safe driving brings adverse effects; followed by the torque after the motor speed will fall rapidly, so accelerated performance in 100km excellence, but acceleration performance in 100km, it will be greatly reduced. This is also Tesla no propaganda than 100km acceleration. The reason for the time; re-needed to increase objects such as drive controllers and inverters, not only increase motor cost and energy consumption, will increase motor volume and weight; there is a rumor that Tesla after China With the advantage of China's local rare earth resources, permanent magnet synchronous motors will be used in the Chinese market to achieve energy saving and weight loss.
3. Is the switching magnetic resistance motor?
China's local production of electric vehicles represented by Teeng 400, using permanent magnet synchronous motors, it can achieve light, energy consumption and safe driving goals, but the highest speed and 100 km accelerate in output power, It is far inferior to Tesla, while in complex environments such as high temperature, vibration and overcurrent, the permanent magnet motor is easily damaged, and most of the rare earth resources required by the permanent magnet material belong to China, the permanent magnet motor is only China has a market, and European Japan has more tend to use a switching magnetic resistance motor.
The switching magnetic blocking motor stator and the rotor are stacked by ordinary steel silicon wafers. There is no winding on the rotor, and the stator is equipped with a simple centralized winding. It has simple and robust, high reliability, light quality, low cost. High efficiency, low temperature rise, easy maintenance, etc. also have the controllability advantage of the DC speed control system, which can be applied to a variety of harsh environments, which is ideal for electric vehicle drive motors, but the noise caused by torque fluctuations. The problem needs to be solved. Read the full story
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