As the power and energy equipment of electric vehicles, electric vehicle motors will cause very serious problems once an air pumping failure occurs, causing the electric vehicle to be unable to drive normally, or even dangerous accidents due to air pumping problems during driving. Therefore, when you find that the motor cannot be used normally, you must stop it for maintenance in time, and do not use motors with hidden faults. So what is the cause of air pumping in the motor? And how to solve it?

　　1. Electric vehicle motors used for higher production cannot be directly exhausted to the atmosphere. If the atmosphere is directly exhausted, the pressure difference between the suction port and the exhaust port will be too large, which will overload the high-slip motor.

　　2. When using electric vehicle motors, it is necessary to have a backing pump. When using the backing pump to draw the pressure in the system to a certain range, this can avoid overloading.

　　3. As the rotor of the electric vehicle motor continues to rotate, the sucked gas is sucked into the space between the rotor and the pump casing from the air inlet, and then discharged through the exhaust port. Therefore, when the top of the rotor rotates around the edge of the exhaust port and the space is connected to the exhaust side, because the gas pressure on the exhaust side is higher, some of the gas rushes back into the space, causing the gas pressure to increase suddenly. As the rotor continues to rotate, the gas is vented.

So when the electric car motor pumping failure, it means that the internal parts of the motor has a serious failure, need to timely overhaul operation, to avoid the aggravation of the failure situation, or will eventually lead to the motor can not provide power energy, resulting in electric vehicles can not drive, to the user to bring trouble.