Maintenance skills

Motor running or failure,can see,hear,smell,touch four methods to prevent and troubleshooting in

time,guarantee the safe operation of motor.A,see Observe the motor running process with and without

exception,the main performance for the following situation.1.The stator winding short circuit,may see

the motor smoke.2.The serious overload or short of motor phase operation,speed will slow down and

have a heavy "buzzing" sound.3.The motor run normally,but suddenly stops,will see the wiring loose

sparks;A portion of the blown fuse or stuck.4.If the motor vibration,could be gearing jammed or motor

fixed,loose bottom bolt,etc.5.If the motor inside contact point and forms a discoloration,burn mark

and stain,then there may be local overheating,electric vehicle motor poor contact or winding conductor joint burned,etc.Second,listen to the Motor should be a uniform and normal operation of the lighter

"buzzing" sound,no noise and special voice.If the noise is too big,including electromagnetic

noise,bearing noise, Ventilation noise,mechanical friction sound,all may be failure precursor or

failure phenomenon.For electromagnetic noise,if the motor send out the voice of high and low and

heavy,the reason may have the following kinds.(1) the uneven air gap between stator and rotor,the

voice of high and low and high and low time interval constant,this is so that the stator and rotor bearing wear and tear caused by a heart.(2) three phase current balance.This is by three-phase winding grounding,short circuit or poor contact,if sound is very depressing,explain motor serious overload or short shipment Line.(3) the iron core is loose.Due to vibration in the operation of the motor in the core fixed bolt looseness caused by loose core silicon steel sheet,making noises.2.The bearing noise,should often listen in the motor running.Monitoring method is: will the screwdriver end to resist bearing installation site,the other end,close to the ear can hear To the bearing running

noise.If the bearing is working well,its sound is continuous and tiny "rustling" sound,does not have

the change of high and low,and metal.If appear the following Several kinds of voice is not normal.

(1) bearing operation "creak" sound,this is metal,generally for bearing caused by lack of oil,should be apart bearing charging right amount of grease.(2) if there "pumping mile",this was the voice of the ball rotates,generally for dry or lack of oil,grease can be loaded with a moderate amount of

grease.(3) if there "raise price" or "creak" sound,for the bearing inner ball irregular movement of

sound,this is the inside of the bearing ball or motor long-term need not,embellish Grease caused by

the drought.3.If the drive mechanism and transmission mechanism continuous instead of high and low sounds,processing can be divided into the following kinds of situation.(1) periodic "snapped" sound for belt joint is not smooth.(2) periodic "drumming sound for loose coupling,or between the pulley and shaft and key or keyways wear cause.(3) uneven clash,as the wind leaf fan cover cause

collision.Three,smell By the smell of the smell of motor diagnosis,and can also prevent failure.If

found to have special smell of paint,the internal temperature of the motor is too high;If found to

have heavy the smell of burnt food or coke Smell,may motor fan be insulation breakdown or winding has been burned.Four,touch Touch the temperature of the motor areas can also determine the cause of the problem.In order to ensure safety,application in hand over hand to touch an electric shock around

motivation shell,bearing parts,if found Temperature anomaly,the reason might be the following.1.Poor

ventilation.Such as fan,air duct jam,etc.2.The overload.Cause excessive current and the stator

winding overheating.3.The stator winding interturn short circuit or three phase current balance.4.The

frequent start or braking.Around 5.electricalmotor1.blogspot.com If the bearing temperature is too high,it may be caused by bearing damaged or short of oil.