The motor has a lot of abnormal noise, what is the problem?

1. The bearing is faulty, causing abnormal noise in the electric vehicle motor.

If the motor bearing of the electric vehicle fails, it will cause the gap to become larger, and the motor will not operate normally, resulting in abnormal noise. For this kind of problem, the general solution is to replace the new bearing, which can solve the problem of abnormal noise of the electric vehicle motor.

Second, the magnet is loose and falls off, causing abnormal noise in the motor of the electric vehicle.

If the magnets inside the electric vehicle motor are loose and fall off, the performance of the motor will be reduced, and when the motor is running, it will make noise. For this kind of problem, the general solution is to re-bond the magnet, which can solve the problem of abnormal noise of the electric vehicle motor.

3. Axial movement, causing abnormal noise in the motor of the electric vehicle.

If there is axial movement inside the electric vehicle motor, then when the motor is running, it will shake and make noise. For this kind of problem, the general solution is to add an appropriate amount of washer in the axial direction, so that the problem of abnormal noise of the motor can be solved to a certain extent.

Fourth, the rotor is swept, causing abnormal noise in the motor of the electric vehicle.

If the rotor of the motor and the stator are not concentrified, the local gap will be smaller, and friction will occur, causing sweeping, which will bring the problem of abnormal noise from the motor. In this case, the general solution is to readjust the rotor and stator, and the problem can be solved.

In short, if there is a problem of abnormal noise in the electric vehicle motor, it must be solved as soon as possible. If you can't solve it yourself, it's best to go to a repair shop for repairs. Of course, strengthening the maintenance of the motor can reduce the occurrence of such problems to a certain extent.

If the motor is abnormal and you want to deal with it, you should also remove the motor and go to the repair place to check it to see what is the cause? If it doesn't work, you can also change it.

One is to check whether the fan wheel is loose, and the other is to disassemble the front and rear end covers to check whether the bearing is due to lack of oil and aging, which are all causes of abnormal noise.

The reasons for the abnormal noise of the electric vehicle motor are as follows:

1. The electric vehicle motor will buzz when it starts, that is to say, the electric vehicle has torque, and the speed of torque is also related to the power of the motor.

2. There is a problem with the controller of the electric vehicle, the electric vehicle controller is used to control the internal motor of the electric vehicle to stop, start, drive, forward and backward, speed and protection, the most important thing is that the controller can change the motor driving current under the control of the handlebar, so as to realize the adjustment of the motor speed of the chain, it can be said that the controller is broken, then the motor will also buzz.

3. If the Hall wire of the electric vehicle motor is damaged, if it is broken, it will lead to mismatch, incorrect data transmission, and a buzzing will occur at this time.

4. Another reason is that we often walk on the waterway, or the electric car is rainy, which will lead to water ingress into the motor of the electric vehicle, after all, the motor is easy to enter the water, and the water is easy to rust, and the motor buzzing will occur at this time.

The solution to the abnormal noise of the electric vehicle motor

If there is a problem with the controller of the electric vehicle, it is necessary to directly replace it with a new controller, and it cannot be repaired, because it cannot be repaired. If the Hall wire of the electric vehicle motor is damaged, the Hall wire cannot be repaired, but can only be replaced, after all, it is an important part, in order to eliminate hidden dangers or directly replace it. If the motor of the electric vehicle is flooded, it can be directly disassembled for drying.

1) Fault phenomenon.

The starter has an abnormal impact sound at the moment of starting.

2) Cause of failure.

a.The tooth top defect cannot be gnawed properly.

b.The starter is not properly installed, and the tooth side clearance is too small.

c.The buffer spring is too soft or broken.

3) Fault diagnosis.

If there is an impact sound when the starter switch is pressed, it means that the starter drives the pinion to mesh. At this time, use the hand crank to place the crankshaft.

Turn an angle, and then press the starter switch to test. If the impact sound disappears and the engine can be started to work at this time, the meshing end of part of the gear of the flywheel ring gear is broken. If the crankshaft turns at any angle and the driving pinion can not be engaged, it is possible that the starter fork stroke or electromagnetic switch stroke is too short, resulting in high-speed rotation of the driving pinion before it is engaged.

In addition, if the starter fixing bolt or clutch fixing bolt is loose, there may also be an impact sound. The fault can be identified by observing whether the starter housing is shaking when the starter switch is turned on.

When the starter starts, there are often metal friction sounds and impact sounds, which are easily thought to be made by the starter driving gears and flywheels, and the two sounds are mistaken for tooth beating. The metal friction sound emitted when the starter slips is very similar to the sound of tooth striking, and it is difficult to accurately identify it without actual diagnostic experience. The method of distinguishing the slipping sound of the starter and the sound of the teeth is introduced as follows

a.The starter drives the pinion slippage more often when the car is cold, especially in winter; Whereas, when the car is hot, it rarely happens or is none. Tooth punching occurs both hot and cold, but sometimes the crankshaft with a slight motor will disappear temporarily.

b.At the moment when the starter starts, if the starter slips, the blades of the pump fan will have a slight movement, but the teeth will not have this phenomenon.

c.When the starter slips, only the metal friction sound of the starter spins out the drive gear clutch, although the sound is louder but not strong, and the metal friction sound made when the teeth are beaten, which is both loud and strong.

d.When the starter is removed from the car for inspection, it will be found that there are no traces of metal wear on the front edge of the slippery gear teeth; The front edges of the punched teeth and flywheel teeth have obvious traces of metal wear.

1. The capacitance has become smaller, and the running torque of the motor fan is insufficient.

3. The motor may be out of phase (it may be that the incoming power supply is loose, the coil is burned, etc.) 4. The fan blades are a little deformed.

First: new energy vehicles:

There are four main types of new energy vehicles: hybrid electric vehicles (HEVs), pure electric vehicles (BEVs), fuel cell electric vehicles (FCEVs), and other new energy vehicles.

At present, countries around the world have begun to implement a comprehensive ban on the sale of fuel vehicles, such as the Netherlands and Norway will officially ban the sale of fuel vehicles in 2025; Germany and India will officially ban the sale of fuel vehicles in 2030; China will completely ban the sale of fuel vehicles in 2035; The United Kingdom and France will officially ban the sale of fuel vehicles in 2040, and so on.

Second: unmanned vehicles

Driverless cars can make travel safer. The latest news, the first batch of L4 passenger cars in China jointly built by Apollo (Apollo) and FAW Hongqi have also completed Changsha road tests. Up to now, the road test mileage of L4 autonomous vehicles has exceeded 2 million kilometers; Google's driverless cars have also completed more than 1.3 million miles of on-road testing in autonomous mode.

Although "unmanned cars" are still in their infancy, it is believed that after a comprehensive breakthrough in technology in the near future, it will shine.

Third: the miniaturization of single-seat cars:

With the increasing prominence of problems such as "traffic congestion and parking difficulties" in the city, there is no doubt that medium and large cars (five-seater, seven-seater) have occupied too much urban road resources and parking lot resources. The "Renault Twizy" displayed at the 89th Geneva International Motor Show in 2019, as the smallest all-round urban commuter car, may be a typical representative of the future development of automobiles tending to "single-seat miniaturization".

Fourth: the interconnection of all things in automobiles

The interconnection of all things in automobiles will take cars as the core carrier, through human-vehicle interaction, and the interconnection of all things, so that cars will become smarter and smarter, and give cars a certain "sense of sight, hearing, touch", and even part of human emotions. Cars are no longer cold means of transportation, but our intimate companions and friends.

To sum up, the future development of automobiles is inseparable from the new "four modernizations" (new energy, unmanned driving, single-seat miniaturization, and interconnection of all things), and automobiles will also evolve from human vehicles to human close friends.