Traction motor for electric vehicle： induction motor, permanent magnet motor, who is the future direction?

In the era of fuel cars, we often hear the battle between natural inspirations and turbocharged engines. And in the era of electric cars, there is also a clear debate between electric motors. After the test of the market, there are two kinds of mainstream electric motors on the market at present, one is induction motor (also known as asynchronous ac motor), the other is permanent magnet motor.

Induction motor is a kind of motor which has the rotor rotation powered by magnetic torque created by the physical interaction of stator winding magentic field and the induction current generated rotor magnetic field.Tesla Model S and Model X are representatives of induction motor applications.

The permanent magnet motor mainly refers to the permanent magnet synchronous motor, and the biggest difference with the induction motor in structure is that the rotor is permanent magnet structure, rather than wound by the electric coil.

Which is better, the induction motor or the permanent magnet motor?

We use a table to visually compare the advantages and disadvantages of the two types of motors.

The large size and weight of induction motor is one of the main reasons for many automobile enterprises to give up the use, after all, this stage to achieve a higher range is the most important. But its acceleration performance is the reason for some automobile enterprises to choose it.

Who is the future?

Dual motor structure of induction motor and permanent magnet motor

In general, the permanent magnet motor has advantages over the induction motor.At present, the range of electric vehicles is still an extremely important indicator, and the high efficiency of permanent magnet synchronous motor can better improve the range.At present, the combination of induction motor and permanent magnet motor is also increasing. For example, tesla MODEL3 and NIO ES8 both adopt the dual motor structure of induction motor and permanent magnet motor.