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Popular keywords: EPS stator automatic line, rotary motor stator automatic line, automobile blower brushless line, automobile brushless cooling fan motor automatic line, servo motor automatic line
FAQ
Many friends ask if brushless DC motors are easy to burn out? In fact, compared to the brush motor, without the limitation of carbon brushes, it reduces the failure rate, but if it is not used properly, or mechanical problems, etc., it will also burn out or all kinds of small faults, so how to prevent the motor from burning out? What are the common prevention methods?
1. Keep the brushless DC motor clean
During the operation of the motor, there shall be no dust, water and debris within 3 meters of the air inlet. Avoid entering the motor to form a short-circuit medium, or damage to the wire insulation, resulting in a short circuit between the boxes, and burn the motor, to ensure that the motor maintains a safe and stable working condition in long-term operation.
2. Ensure that the brushless DC motor runs under rated current.
The main reason for motor overload operation is that the dragging load is too large, the voltage is low, or cause the driven machinery to stagnate, if the overload time is too long, the motor will absorb a large amount of active power, the current will increase rapidly, and the temperature will also rise, it is easy to burn the motor. Therefore, to ensure that the motor in the rated current work, but also pay attention to check the operation of the transmission, coupling and gear drive concentricity.
3. Pay attention to check the temperature of brushless DC motor
Daily check the temperature of the motor's bearings, stator, casing and other parts, especially for motors without voltage, current, frequency monitoring and overload protection, pay more attention to monitoring the temperature rise. If the temperature rise is found to be too high, stop the machine immediately for inspection.
4. Observe whether the DC brushless motor has vibration, noise and odor.
If the motor vibration, connected to the load part of the non-concentricity will also become high, increase the motor load, motor overload will burn the motor, need to frequently check the motor end cover, ground bolts, bearing gland, etc. whether loose, once the problem is found , must be resolved in a timely manner.
5. Ensure the normal operation of the starting equipment
Generally speaking, the good and bad starting equipment determines whether the DC brushless motor can start normally, such as starting equipment phase start, contactor contacts arc, fire, etc. For example, if the contactor contacts are not clean, the contact resistance will increase, resulting in maintenance network heating, burn contacts, thus burning the motor. Therefore, always pay attention to the cleanliness and tightness of the starting equipment, the electrical control cabinet should be located in a dry, ventilated, easy-to-operate location, and should be regularly removed from the dust.
In fact, the brushless DC motor is still not easy to burn out, we have to pay attention to is to do a good job of routine maintenance, found problems, timely solution to ensure that the motor runs normally.
Brushless DC motors are widely used, especially in aerospace, aeromodeling, new energy vehicles, intelligent office equipment, power tools, household appliances and other industrial applications, some friends for brushless motors are not very well understood, do not know the advantages and disadvantages of brushless DC motors, is not suitable for them, the following Hohui briefly introduce it to you! I hope it can help you!
Brushless DC motor advantages:
1. Remove the traditional brushed mechanical commutation, using electronic commutation, fully enclosed structure, more reliable performance, lower failure rate.
2. The external characteristics are better, it can output more torque under low speed operation, and it can provide larger starting torque.
3. Smaller no-load current, wider speed range, can run at full power at different speeds.
4. Smaller size, higher power, stronger overload capacity.
5. Long service life, maintenance free.
Disadvantages of brushless DC motor:
1. There is a slight vibration when starting at low speed, speed up, the frequency of phase change will be larger, the vibration phenomenon is reduced.
2. The control requirements are higher than the brush, but also more complex, the price is also higher.
3. Easy to form resonance, can be adjusted to reduce.
The above are the advantages and disadvantages of brushless DC motor, in any case, relative to the brush is still quite advantageous, is still in the continuous research and development, I believe that the future potential.
Some friends in the use of DC brushless motor, found that it can not start, can not be energized, a moment also do not know what is the reason, more headache, then in the end what is the reason can not start it? Hopwise simply give you an analysis! I hope it can help you!
1. It is possible that the power supply voltage is insufficient, the voltage is too high and unstable, or the circuit may have poor contact, loose or detached connectors, or even short circuits, or the wire sheath may be damaged, causing the DC brushless motor to fail to start. 2. The load of the DC brushless motor is too large, exceeding its own load torque, resulting in the inability to start. 3. If there is a problem with the Hall element, it can also cause the DC brushless motor to fail to start. 4. The control circuit of the controller is not connected or underconnected, resulting in the motor being unable to start. 5. Demagnetization or demagnetization of the magnetic steel in the motor rotor can lead to unstable magnetic field and also affect motor startup. 6. The DC brushless motor rectifier may be worn, burned out, or contaminated with oil, as well as the magnetic field coil may have an open circuit or short circuit, which can cause the motor to fail to start. The DC brushless motor cannot be started without power, and must be checked in a timely manner, otherwise it will affect work efficiency. Based on the above reasons, troubleshooting and repair can be carried out to ensure the normal use of the motor.
Brushless DC motors are widely used, many places have to use it, some friends in the purchase of brushless motors, they are more worried about its service life, in fact, this is also the majority of people are more concerned about, then what are the factors affecting the service life of brushless DC motors? Hohui briefly introduce it to you!
Due to the fact that DC brushless motors often have to bear a relatively large load and maintain operation, the lifespan can be roughly considered from the factors of the motor itself, human operation, and environmental factors. Here is an analysis: 1. The factors of DC brushless motors themselves: 1. The bearing is an important part of motor operation, and without carbon brushes, the bearing becomes a relatively vulnerable part of DC brushless motors, Bearings with good quality generally have a longer lifespan, and the rotor magnetic steel demagnetizes. The longer a DC brushless motor is used, the magnetic properties on its magnetic steel will gradually disappear. 3. Problem with stator coil. Generally speaking, the aging time of the motor coil is more than 10 years. During normal use, it is important to maintain the coil temperature not too high and ensure good heat dissipation to increase the coil's service life. 2、 Due to human operation factors, the technical level of personnel operating the motor varies during use, resulting in incorrect operation of the motor. For example, the motor stops as soon as it starts; Overload start; And startup during faults, which can damage the brushless motor and affect its service life. 3、 Environmental factors: Brushless motors should be used in ventilated, dry, non corrosive gases, and normal air temperature and pressure environments. If there are corrosive gases and high humidity in harsh environments, they are easily affected by the environment and can damage the electrical and mechanical performance of the motor. The design life of a general brushless motor is 20 years, but the actual service life is generally not reached. So in general, brushless motors require a major overhaul every 10 years. Of course, if the motor is well maintained, its service life can be extended.
In recent years, the hair dryer market has changed a lot, a variety of net red fan endless, favored by the majority of young people, can be said to be the daily home or travel must bring products!
Net red wind dryer since it can be called "net red", there must be its advantages, the new high-speed wind dryer, with a professional 100,000 rpm DC brushless motor, high-speed rotation, wind volume is greater, from the inside to the outside of the fast blow dry hair, reduce the damage to the hair at the same time, the noise is small, to give a person a comfortable sense of experience.
When it comes to high speed air blower, what are the characteristics of matching DC brushless motor? How about the stator winding design program? Hopwise briefly tell you about it!
1, high-speed wind turbine with professional research and development of DC brushless motor, can be high-speed operation, the speed can reach more than 100,000 rpm, the wind volume is sufficient;
2, high-speed wind turbine brushless DC motor is very small, tiny motor, tight structure, making the overall capacity of the wind turbine is smaller, good to carry, especially convenient for traveling;
3, high power, lower noise, departure feeling more comfortable;
4, brushless motor is stable and durable, almost no maintenance, easy and convenient.
High-speed wind turbine brushless motor stator winding process:
Most of the wind turbine motors are small stator, mostly using this micro-small internal winding program design, especially the majority of 6 slots, wire diameter 0.12mm or so, with a hook and pin type internal winding machine to complete the winding work, because of the large output demand, so it is also commonly used six-station high-speed internal winding machine, easy and convenient.
Six-station high-speed internal winding machine features:
1、Winding 6 stators at the same time at high speed, the winding speed can reach 1000r/min;
2、Precision lining up at the same time of high speed winding, 4-36 slots unlimited change;
3、The number of turns can be more than 500 turns;
4、The equipment chassis adopts 8mm square tube welding process to ensure the stability of high-speed operation.
What are the characteristics of high-speed air blower brushless motor? How is the stator winding design program? The above has made a brief introduction, I hope these tips can help you!
Carbon brush motor is also known as the traditional brush motor, and brushless motor, the use of the two are relatively wide, each has its own advantages, but compared to the brushless motor or have more advantages, the industry is also more detailed, can be used in some special industries, so what is the difference between carbon brush motor and brushless motor? Hopefully, it can help you! Hope it can help you!
The differences between the two are mainly analyzed from the following five aspects: 1. Parameter indicators: Compared to brushless motors, in addition to common parameters such as weight, size, voltage range, and no-load current, there is also a KV value parameter, which is an important parameter for brushless motors and is often mentioned in aviation model brushless motors. 2. Scope of application: Brushless motor control is relatively complex and commonly used on more precise products. Due to the absence of commutation sparks, it can also be applied in some special industries; Brushed motors are commonly used on some conventional products. 3. Service life: Due to continuous friction of the carbon brush, it will cause wear and tear, so the service life of the brush motor is not long and it is often necessary to replace the brush; Brushless motors are different, they can work continuously for tens of thousands of hours, free from maintenance, and are easy and convenient. 4. Usage effect: The brushless motor adopts digital frequency conversion technology, which has strong control performance and can quickly achieve an increase in speed, even from a few to tens of thousands of revolutions; After starting the brush motor, the speed is relatively stable and difficult to adjust. 5. Maintenance: The carbon brush motor needs to be replaced frequently, otherwise the motor will have problems; Brushless motors have a long service life, which can be more than 10 times that of brush motors. They do not require daily maintenance, but their structure is relatively complex, making maintenance more troublesome than carbon brush motors. The above are the five major differences between carbon brush motors and brushless motors. After reading the above introduction, do you all understand? Only by fully understanding these basic knowledge can we have a clearer understanding of the performance of various motors.
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