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What should I do if the Roots blower motor is too hot and the current is too high, causing it to burn_ Roots Blower

Source: Roots blower manufacturer Released on: December 7, 2021 Hits:

preface:

Today, the after-sales customer service received a call from the customer. The fan customer said anxiously, "The motor is burned out. What's the matter with this situation? I used to use a fan from another Roots fan manufacturer to match the motor
The motor is often burned out. What is the reason for this! What's wrong with my usual operation? Please give us some advice. Otherwise, the motor often burns out, which is also a resource
What a waste! "
We take this event to popularize the cause of motor burnout to all customers who use Roots blower. Pay more attention in your future operation and use. Please read carefully:

1、 Motor phase failure operation

This is the killer of three-phase asynchronous motor. When the motor operates normally, the three-phase load is symmetrical, so the three-phase current is basically balanced and the size is the same. If the motor loses phase (any of the three-phase windings
The phenomenon of one phase disconnection is called phase loss), the vibration of roots blower will become larger, there will be abnormal sound, the speed will drop, the current will increase, and the motor temperature will rise sharply, which will cause the motor to burn out
The motor will burn out in ten minutes at most.

2、 Bearing damage

Due to the continuous operation of Roots blower for a long time, the temperature rise of the motor body is too high, and the bearing is not filled with grease in time, resulting in bearing oil shortage until the bearing is damaged, shaft bending, belt fracture, etc
The phenomenon causes the friction between the stator and rotor (commonly known as bore sweeping) to cause a sharp rise in the core temperature, burn the slot insulation and turn to turn insulation, and cause the winding turn to turn short circuit or "blasting" to the ground from the surface. In serious cases, the stator core

Reverse groove, dislocation, shaft wear, end cover scrap, etc.

What to do if the Roots blower motor is burnt out?

3、 Overload burning will be caused when the air valve is closed

The air valve is not opened or the amount of opening is not enough after Roots blower is started. Under this condition, the operating temperature of roots blower motor rises sharply until the air outlet is burned or the air valve is recovered
When the Roots blower is not shut down in time, the temperature of the motor body will rise sharply until it is burned out. If the protection function is normal (add appropriate thermal relay)
, generally does not occur. However, it should be noted that the thermal relay cannot be verified, the protection value is not very accurate, the model selection is not appropriate, and the manual setting is automatic reset, so it needs protection
Sometimes, it often does not work, or after several times of protection, the real reason is not found, and the protection value is artificially raised. To disable the protection.

4、 Be affected with damp

The insulation reduction caused by water ingress or moisture of the distribution cabinet or motor is also a common cause of damage, but there is no way to protect it. Only pay attention to and shake the insulation regularly during use. Before the motor explodes, dry
It can be solved by re dipping. Especially for the motor driven by frequency converter, be more careful about this item, otherwise it may be burned together with the frequency converter.
The above is the reason why Roots blower motor often burns out. Do you understand? If you have any questions, please consult the website customer service, and we will answer them one by one. Please continue to pay attention, and we will continue to update!
Word tag: Roots blower
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