Lei Jun has repeatedly stressed that the core competitiveness of Xiaomi Automobile is intelligent, but the first patent exposed after the establishment of Xiaomi Automobile Technology Company was a product that "improved motor safety".
Recently, some media found in Tianyan that Xiaomi Automotive Technology Company issued a patent called "control method, device and readable storage medium of multiphase motor", which is also the first patent released after the establishment of Xiaomi Automotive Technology Company.
Sky Eye Check shows the first patent for Xiaomi cars
The patent introduction shows that in the case of phase-deficient fault of the multiphase motor, the current position of the rotor is obtained, the target area to which it belongs is determined, and the multiphase motor is controlled according to the corresponding control strategy of the target area, which can realize the fault-tolerant control of the motor on the basis of changing the hardware structure without additional devices, thereby improving the reliability of the electric drive system.
Overall, this is more like an innovative software applied to motors.
In fact, most of the drive motors of electric vehicles use permanent magnet multiphase DC motors, where "phase" refers to the number of coil groups inside the motor, and "lack of phase" refers to the phenomenon of power failure in one or several sets of coils, similar to the lack of cylinders on fuel vehicles.
As for the "lack of phase" there are many reasons, such as extreme poor contact, electronic control system false break insurance, etc., and once the motor is out of phase, the output power of the light will decline (lose power), and the heavy will directly burn the motor.
Unexpectedly, the first patent of Xiaomi Car was actually to solve this problem, it seems that inside Xiaomi Car, the extremely small safety risk must also be treated with caution!