Permanent magnet motor, as the name suggests: a motor with a magnetic core inside. It differs the asynchronous motor in the unique structure of the rotor, which has a high-quality permanent magnet pole.

It is characterized by: the power per unit weight is large, the overload current is large, but the speed is low. Suitable for low speed high torque, all two-wheel drives are mostly permanent magnet motors. Moreover, because of the magnetic core, the permanent magnet motor costs more.

Asynchronous motors permanent magnet motors are similar in structure, only there is no magnetic core, (remember the middle school textbook cutting magnetic field lines to produce current?) It is characterized by: it has no magnetic field when it is powered on, so it consumes electricity, only through a large amount of electricity can a magnetic field be generated. When it is fast, the speed can reach 15,000 RPM, which is a high-speed motor, high speed produces high power. However, it has low cost, strong overload capacity easy installation maintenance.

The power performance of electric vehicles is reflected in the two aspects of high speed 100 km acceleration time, which is determined by the motor output power, the motor output power is determined by the speed torque. Tesla uses an AC asynchronous motor, which can be driven by ultra-high voltage weak magnetic field to achieve a high speed of over 10,000 RPM. At the same time, it can drive the motor control system such as frequency converter. It can realize the motor's high torque operation at 600Nm, thus ensuring the Tesla motor's high power output, thereby improving the Tesla power performance, which is why Tesla loves the AC asynchronous motor.

Although the asynchronous motor costs less, but it consumes a lot of electricity, so the energy consumption is higher.