Dust explosion-proof motor

 Y2 series 0.75kW (1HP) AC Motor for Speed Control
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 
4. low noise and vibtration 
It refers to the shell design and manufacture according to the prescribed conditions, can prevent the dust ac electric motor into the motor shell or cannot completely prevent dust to enter, but it into the quantity does not interfere with the safe operation of the motor, and internal dust accumulation is not easy to produce fire danger, when using, also won't cause around with explosive dust mixture explosion of the motor. Its features are: (1) the shell has high sealing, in order to reduce or prevent dust acmotor2.blogspot.com into the enclosure, even to enter, it into the quantity also not form fire danger. (2) control the shell top surface allow temperature does not exceed the prescribed temperature group. At electric generator present, has been used in national food reserve of mechanized equipment. The national standard of dust explosion-proof electrical equipment for GBl2476.1-90 dust explosive environment with explosion-proof electrical equipment.

From abnormal vibration of asynchronous motor and how to determine the cause of the problem in his voice?

AC induction cooling fan motor
Specifications
1.Customised
2. good quality

3. 20 years manufacturing experience

Asynchronous motor produce abnormal vibration and abnormal sound mainly has two aspects of mechanical and electromagnetic. Mechanical reasons: (1), motor blades damage or tighten screw loose blades, blades and the blades into cover, clattering sound produced by it with the weight of the sound, the big small; (2), due to the improper bearing wear or shaft, motor rotor eccentricity caused serious when will make, rotor rub, make the motor produces severe vibration and electric fan motor uneven scratches. (3), motor due to long-term use of the anchor bolt is loose or not foundation, thus the electromagnetic torque of the motor under the action of abnormal vibration; (4), long-term use of the electric motor 12v 500w motor due to a lack of lubricating oil in the bearing inner formed in mill run or bearing steel ball is damaged, therefore make the hiss of the motor bearing interior an exception or purr. Electromagnetic reasons: (1), the normal operation of the motor suddenly appear abnormal sound, in the load running speed decreases significantly, while a low along the roar, may be unbalanced three phase current, the heavy load or single phase operation; (2), the normal operation of the motor, if the stator and rotor winding short-circuit fault ac induction motor 110kw or squirrel cage rotor broken bar when electric are high when low buzz. 

Y series totally enclosed protect Asynchronous motor
Specifications
1. 20 years manufacturing experience
2. 12 months guarantee
3. low noise and temperature rise

4. high starting torque

The fuselage vibration. (1), due to long-term lack of oil running of motor bearing, friction losses increase bearing overheating. In addition, when the motor running, the oil too much or too thick will also cause bearing overheating; (2), when the replacement of lubrication, due to the lubricating oil mixed with hard grain impurity or bearing cleaning uneven net, make bearing wear and overheating, even may damage the bearing; (3), due to improper assembly, fixed end cover wholesalemotor.blogspot.com screw tightness is differ, in a straight line between the two bearing center is unbalanced or bearing outer ring. The bearing rotation is not flexible, adds load after growing friction and heat; (4), belt too tight or motor and were not in a straight line with mechanical shaft center, and thus can increase the bearing load and heat; (5), bearing improper selection or poor quality, such as bearing internal and external ring rust, individual steel ball is not round, etc.; 6, in the operation of the motor bearing damaged, resulting in bearing overheating.

Three-phase no-load current of 2.5 0.75 KW motor, what reason be

Y2 series electric motor wholesale
Specifications
1. effiency: IE2 and IE1
2. 20 years manufacturing experience
3. 12 months guarantee
4. low noise and vibtration
There are two 0.75 KW... Grade 4... 380 v... The motor.. No-load current is between 2.3 to 2.6... Work environment textile... 'a lot... Rated current of the motor is only 2.2... Normal no-load current is www.dongfeng- motor.com around 1.6... Time machine completely under the condition of no load over current... Due to the current big. So high temperature sharply born... Will soon.. Overheating damage... Please say the reason... thank you Problem complement: I thank two answer first... Disease, spare parts and together, the two are not normal before.. In a few years later. You'll find the bad one current is increased. [. Repair of the motor are friends. Eliminate offline ribbon..] ... Until now, with or without load... Motor current is bigger... Last year when the motor current in 2.0 A... Now 2.4-2.5 A... Motor ac motor shaft sleeve inside and outside in good condition... Have not completed... Don't go... Just electric pilot time to run the old hot... Often the temperature in fan cover the 60-80 degrees... Wiring is right... Are the normal installation...