7 5 The motor brake can t be opened, but it still rings so loudly, how to deal with it

First of all, you must be clear about why your phone does not turn on.

There are two kinds of problems with the phone not turning on: hardware or software, and system. If there is an external force, such as being dropped, pressed, flooded, overheated, etc., it must be a hardware problem.

If you have some software, delete some system files, or can't boot after flashing, this is generally a software or system problem. Understand the problem** problem and solve it. There are two situations in which the phone does not turn on, and the solutions are as follows.

The phone is on and responds but can't be turned on normally:

This is the most common situation where your phone won't turn on. When the phone is turned on, there is a vibration and sound, but the screen is dark; After the mobile phone is turned on, it has been stuck in the logo interface and cannot enter the operation interface; There is also the fact that the mobile phone can enter the normal interface but there is no response when you click on anything, etc., which is the most common manifestation of abnormal boot.

First things first: check your phone's battery. The reaction when the phone is turned on proves that the battery is still working, and in addition to the aging of the battery and water ingress, the battery problem can be ruled out.

If the battery is aging, you can try it with the same type of battery, and if it can be turned on normally, then replace it with a battery; If it is water, turn on the device when the water has not yet dried, it will cause a short circuit in the battery, and the phone will only run for a while, and the battery will be damaged due to a short circuit, you can wait for a day or two for the phone to completely dry and change the battery.

Then: check your phone screen. Under the destruction of external forces, the screen fails, especially some mobile phones themselves are soldered, which is particularly prone to "fake not booting" caused by the screen.

Although only a slight fall, but the mobile phone screen is no longer responsive due to the disconnection of the line, at this time you can tap the phone, a few more shots, if the mobile phone screen will flash from time to time, this proves that the mobile phone is only a certain line of problems, you can disassemble the machine after finding the disconnected solder joint to re-weld, or go to the repair point for repair. Especially when the phone vibrates and sounds normally when it is turned on, but the screen does not respond. This is especially the case for consideration.

Again: Check if you can enter recovery, consider flashing. Both of the above are hardware problems, but the phone can't be turned on completely normally, because there are many software or system problems.

If the phone is just stuck in the logo screen or can not be operated when booted into the interface, then check whether the phone can enter recovery, press and hold the power button + volume down key, if the phone enters the following screen, and can move the cursor by moving the volume + and - keys of the mobile phone, then the phone can be solved by flashing.

There must be a road before the car reaches the mountain, and Toyota brakes can't brake.

In most cases, the cause of the "buzzing" occurs on a mechanical hinge. This phenomenon occurs when the bearing characteristics are not good, or when the tightness is not suitable. The key role of the motor is to form the driving torque, when acting as the power unit of electrical appliances or various mechanical equipment.

In addition, it should be noted that whether it is a brushed electric vehicle motor or a brushless electric vehicle motor, its excessive input current will basically interfere with the performance index. The voltage of the motor is supplied with the help of a regulator.

Introduction:

As the electronics in the regulator get older, the current fed into the motor increases. Therefore, it is important to check the regulator and replace the regulator at a certain time. Lubricate the gears, bearings and their speed-reducing parts of the electric vehicle motor on time, and replace the regulator if the gears and bearing jackets are worn too much, the anti-vibration plates are deformed, and the spring characteristics are reduced or broken.

Pay attention to charging the electric vehicle battery from time to time, so that the battery can maintain a good voltage, prevent the motor from heating due to the lack of voltage, and accelerate the aging of the electric vehicle motor.

Hello, the motor buzzes when the electric car steps on the brakes, there are two possibilities, the first possibility is normal, because the motor is energetic when decelerating and stepping on the brakes, so the sound is made The second situation is that the motor may have a problem with the abnormal motor, you need to determine which situation it belongs to?

Abnormal; Because of the failure of the brake line, the brake is not powered, so that the motor is overloaded with this sound.

This is mainly due to the friction problem of braking.

Of course, it's not normal, and the brake pads should be replaced with new ones.

What's going on with the three-phase motor with brakes that only rings and doesn't turn, the three-phase motor doesn't turn and only buzzes for the following reasons: 1. Power supply problems, lack of phase causes the motor to fail to start. 2. The motor cannot be started due to excessive load.

3. Stuck by dragging machinery. 4. The rotor circuit of the winding motor is open and disconnected. 5. The position of the internal head of the stator is wrong, or there is a broken wire or short circuit.

Solution: The first way: the power cord needs to be checked, mainly to check the wiring and fuse of the motor, and whether there is any damage to the line.

The first two types of complaints: the situation will be unloaded after the motor is unloaded and started without load or half load. The third type:

The situation is estimated to be due to the failure of the dragged instrument, unloading the dragged instrument, and finding the fault from the dragged instrument. Fourth: Check the connection of each contactor of the brush, slip ring and starting resistor.

Hello! There are several possible failures:

1. There is a phase loss fault in the power supply of the motor. (Detect whether the three-phase voltage is normal) 2. The motor winding is damaged. (Detected by multimeter DC resistance method) 3. The motor bearing is damaged and the chamber is scanned.

4. Brake device failure.

It is recommended to carefully inspect each part and troubleshoot before powering on to ensure the safe operation of the equipment.

Hope it helps!

1.If the sound is very brittle, it means that the brake is energized to start, which means that the brake is a loss of power brake, and the brake is good.

2.If the brake starts but the motor does not run, the problem is described upstairs, and it should be tested according to what was said upstairs, or contact the manufacturer directly, or it may be solved.

It may be that it is still in the state of braking, and if it is not lacking, it must be disassembled for inspection.

1. The motor is out of phase.

2. The brake device is not opened.

If the motor is good, it will not start after powering on. It can be judged as a lack of phase of the power supply. Because the stator winding of the three-phase asynchronous motor is introduced into the three-phase alternating current with a phase difference of 120 degrees and the current intensity changing according to the positive curve, the rotating magnetic field is formed.

The rotor rotates under the pull of a rotating magnetic field. If a phase is missing. The magnetic field of the stator windings will only form a fixed pulsating magnetic field.

The rotor cannot be pulled to rotate. So the motor doesn't start.