How to deal with the ignition of the carbon brush of the generator, and what is the reason for the b

It can be excluded from the following points:1Check whether the length of the brush is too short to reach the lifeline, resulting in too little pressure and the brush cannot touch the slip ring; 2.

Check whether the pressure of the spring finger is appropriate, if it is too small, it will cause the skipping brush to discharge; 3.Check the surface finish of the slip ring, if it is too hairy, it will increase the contact resistance of the brush, resulting in large sparks; 4.Check the rotor electrical to ensure that the resistance is normal and there is no short circuit between turns; 5.

Check whether the oil gap of the bearing is too large, resulting in a large runout of the brush on the slip ring when the rotor rotates, and check whether the radial runout on the surface of the slip ring is too large. The brush is bounced to produce sparks; 6.In addition, whether the brushes are consistent with the previous ones, the brushes have requirements for conductive current and friction speed.

Precautionary measures. 1. Carbon brushes and slip rings should be inspected every day, and the main inspection items are:

1) The wear length of the carbon brush does not exceed 2 3. When the wear length of the carbon brush exceeds 2 3 (i.e., the top of the carbon brush is in the same plane as the top of the brush grip), it must be replaced.

2) There is no spark in the carbon brush. When the carbon brush first starts to spark, it is necessary to find the cause and eliminate it in time.

3) There is no offset slip ring phenomenon on the carbon brush, and there is no cracking on the edge of the carbon brush.

4) The carbon brush braid is well connected with the brush holder and the carbon brush, and there is no heat and touch the brush.

5) There is no jumping, shaking or jamming of the carbon brush in the brush grip.

6) Regularly use a DC clamp meter to measure the current sharing of each carbon brush, use an infrared thermometer to measure whether the carbon brush is overheated, and replace it in time if there is any abnormality.

7) The spring pressure is normal, and there is no deformation and fracture. Under normal circumstances, the pressure of each carbon brush should be uniform and stable, and its unit pressure is usually between 1 1kg and 2 5kg, and the uneven pressure difference between each carbon brush should be within 5.

8) The distance between the brush grip and the slip ring is in line with the specified value. The distance between the generator brush grip and the slip ring: mm, the distance between the main excitation brush grip and the slip ring: 2 4 mm.

9) The surface of the slip ring should be free of discoloration, overheating and uneven wear, and the surface temperature of the slip ring should not be greater than 120.

10) There is no fouling on the brush grip and brush holder. If there is a lot of dirt, it should be swept with a brush or purged with compressed air.

Whether the generator is DC or AC, if the carbon brush of the DC generator is ignited, it is a short circuit in the coil in the electrical area, and it is good to find the place where the short circuit is separated! If the alternator carbon brush is ignited, the carbon brush is not good to replace, and it is possible that the copper ring in front of the carbon brush is too dirty, so it is good to sand it with sandpaper.

Summary. Hello, according to your problem, provide the following help, the factors that cause the heating of the carbon brush 1, the dispersion of the resistance of the carbon brush increases, so that the resistance of the carbon brush heats up. 2. Carbon swipe card resistance.

After the carbon brush is energized, the brush body expands, and it is easy to get stuck in the brush grip; Some carbon brushes will produce obvious jamming on the upper edge of one side of the brush grip and the lower edge of the other side due to vibration, brush grip is not perpendicular, etc., these forms of resistance, the current can still be measured with a clamp meter, which is easy to be misled. At this time, the carbon brush has failed, resulting in an increase in the current distributed by the other carbon brushes and an increase in heat generation. 3. The pressure of the carbon brush is reduced.

Although it is a constant pressure brush grip, there is a difference in the pressure of each spring. The pressure is small to a certain extent, the contact is unstable, the contact pressure drop increases, and the heat generation increases significantly. At the same time, due to the insufficient spring pressure, the contact surface between the brush grip and the carbon brush is lengthened, which increases the friction resistance of the side of the carbon brush, and the carbon brush is blocked in the grip.

4. The contact surface of the carbon brush forms an air film. The carbon brush operates at the maximum allowable speed, and it is easy to produce air film and runout on the contact surface, and the current flowing through the carbon brush is unstable. The groove and grinding on the surface of the slip ring are larger, and the contact surface of the carbon brush can destroy the air film.

However, the opening of the groove reduces the actual contact area of the carbon brush. 5. The formation of slip ring oxide film is too thick, the contact resistance of the carbon brush increases, and the excitation current is shunt.

What is the reason for the generator to burn carbon brushes.

Hello, according to your problem, provide the following help, the factors that cause the heating of the carbon brush 1, the dispersion of the resistance of the carbon brush increases, so that the resistance of the carbon brush heats up. 2. Carbon swipe card resistance. After the carbon brush is energized, the brush body expands, and it is easy to get stuck in the brush grip; Some carbon brushes will produce obvious jamming on the upper edge of one side of the brush grip and the lower edge of the other side due to vibration, brush grip is not perpendicular, etc., these forms of resistance, the current can still be measured with a clamp meter, which is easy to be misled.

At this time, the carbon brush has failed, resulting in an increase in the current distributed by the other carbon brushes and an increase in heat generation. 3. The pressure of the carbon brush is reduced. Although it is a constant pressure brush grip, there is a difference in the pressure of each spring.

The pressure is small to a certain extent, the contact is unstable, the contact pressure drop increases, and the heat generation increases significantly. At the same time, due to the insufficient spring pressure, the contact surface between the brush grip and the carbon brush is lengthened, which increases the friction resistance of the side of the carbon brush, and the carbon brush is blocked in the grip. 4. The contact surface of the carbon brush forms an air film.

The carbon brush operates at the maximum allowable speed, and it is easy to produce air film and runout on the contact surface, and the current flowing through the carbon brush is unstable. The groove and grinding on the surface of the slip ring are larger, and the contact surface of the carbon brush can destroy the air film. However, the opening of the groove reduces the actual contact area of the carbon brush.

5. The formation of slip ring oxide film is too thick, the contact resistance of the carbon brush increases, and the excitation current is shunt.

I hope my answer can help you.

The brushed motor burns the carbon brush, which is usually caused by the use of the motor for too long or the motor is overloaded, and the following are the specific reasons and solutions:

1.Time problem: the brush motor burn carbon brush has been used for too long, the brush charcoal has been worn out, and the treatment method needs to replace the motor carbon brush.

2.How to use: If there is too much load or too high speed, which causes burning, the treatment method needs to replace the new burn-resistant load motor or use a motor of appropriate specifications.

3.Motor quality problems: the product quality is not up to standard or the production process is poor, the conductive strength of the brush is not enough, it is easy to burn, and the treatment method needs to replace the motor with better quality.

The above are a variety of reasons for the burning of carbon brushes in motors, which need to be improved in terms of avoiding too long use, reducing load, and selecting high-quality motors to maintain the long service life of the motor. If you encounter a problem that cannot be solved, please consult a professional for advice.

Brushed motors are a type of motor that uses carbon brushes and brushes to transfer electrical energy, and they are commonly used in devices such as robots, home appliances, and automobiles. If the motor burns carbon brushes, it may cause the motor to run late, unstable or even stop completely. The following are the reasons that may cause the brushed motor to burn the carbon brush:

1.Poor contact between the carbon brush and the energized part: If the carbon brush does not properly contact the collector ring or brush of the motor, high heat will be generated, which will burn the carbon brush.

2.Carbon brush damage: Due to long-term wear and tear or poor quality of carbon brushes, they may crack or decompose, causing the current to deviate, thus burning the carbon brushes.

3.Damaged motor chip: If the motor chip fails, the motor will not rotate normally, and the current will become unstable, thus burning the carbon brush.

4.Overload use: When the motor needs to be overloaded, its current will increase, which will increase the wear of the carbon brush until it burns out.

In order to avoid burning the carbon brushes of the brushed motor, maintenance and maintenance can be carried out regularly to ensure that the carbon brushes are in good contact and fully lubricated. In addition, the load on the motor should be reduced and overloaded should be avoided to prolong the service life of the carbon brushes.

The carbon brush of the brush motor is a very important part, and the role of the carbon brush is mainly as follows:

1.An external current is applied to the rotating rotor through a carbon brush.

2.The Shizuno Bi Attack charge on the large axis is introduced into the earth through the carbon brush.

3.Guide the Dasong brother shaft to the protection device for rotor grounding protection and measure the positive and negative voltage of the rotor to the ground.

4.Change the direction of the current.

What is going on with the serious ignition of the carbon brush of the DC motor It is inevitable that the carbon brush of the motor will contact with the commutation pole, and it is normal for some weak sparks to be generated because of the uninterrupted sliding friction. But sometimes, especially just after the new carbon brush spark will be relatively large, the carbon brush wear will be accelerated, and the rotor will be burned in serious cases, some friends think that the spark is a problem with the stator, in fact, otherwise, from Yongkun Motor's experience in developing motors for many years, it will generally not be a problem with the stator. If the orange is not still very big, then there is a little possibility, and it is possible that the carbon brush you replaced is not tightly integrated with the slip ring of the armature, and you can adjust the pressure of the carbon brush to see.

Causes and solutions for excessive sparks of carbon brushes (1), the use of non-original carbon brushes, the carbon brushes are hard or the grade does not meet the requirements Solution: replace the original carbon brushes (2), the spring pressure on the motor carbon brush is uneven, dust-free sand wall grinding machine Solution: Properly adjust the spring pressure to keep the pressure of each carbon brush balanced (3), and the brush grip is loose Solution:

Tighten the brush grip bolt tightly, so that the brush grip and the commutator surface are parallel (4), the brush grip is too far away from the commutator surface Solution: Adjust the distance from the brush grip to the commutator, generally 1 3mm (5), the carbon brush and the commutator are in poor contact with the dust-free sand wall machine wall grinder Solution: Xi'an moving company ** prompts that the carbon brush may be worn too short, and the contact surface of the carbon brush is grinded or replaced with a new carbon brush (6), and the carbon brush and the brush grip are not properly matched Solution:

It can not be too tight or too loose, to ensure that the brush can slide freely in the brush grip when it is hot, and if it is too tight, you can use sandpaper to sand the carbon brush appropriately, and if it is too loose, you should replace it with a new carbon brush. (7) The mica between the pieces of the commutator is not cleaned, and the remaining mica is removed with a hand broach, and the solution is as follows: the mica between the pieces of the commutator is prominent, and the center position of the commutator (8) and the brush frame is not the right for the dust-free sand wall machine wall grinder; Workaround:

Move the brush holder, select the best position of the spark (9), and short-circuit the reversing pole coil; Solution: Rewind the coil (10) and short circuit the armature winding, Solution: Disassemble the motor, check the armature winding, find out the open circuit with a millivoltmeter, and rewind it if it cannot be welded.

If the conditions are not met, replace the armature with a new one. If none of the above problems are true, it may be caused by the following factors: 1. The bearing is worn and the starting current is large.

2. The contact area between the carbon brush and the rotor is small. 3. The pressure of the carbon brush is small, and there is no full contact with the rotor.

The ignition of the carbon brush of the motor may be a problem inside the motor and needs to be dealt with in time to avoid damaging the motor or causing greater danger. Here are some ways to deal with it:

1.Stop using the motor. If the carbon brush of the motor is ignited, the use of the motor should be stopped immediately to avoid greater safety problems caused by the fire.

2.Remove the motor and replace the carbon brushes. Disassembling the motor and replacing it with a new carbon brush is the fundamental solution to avoid ignition of the carbon brush of the motor.

The replacement of carbon brushes needs to be operated according to different brands and models of motors, and it should be noted that the exact same model as the original carbon brush should be selected when replacing carbon brushes.

3.Check the line. Sometimes the carbon brush ignition of the motor is also related to the wiring, so you can check whether the wiring of the motor has a short circuit or poor contact, and if so, it needs to be repaired or replaced.

It should be noted that for large electric banquet machines or high-voltage motors, the removal and replacement of carbon brushes needs to be operated by professional technicians, and should not be disassembled or replaced without permission.