The reason that asynchronous electromotor winding damages reachs a processing technique

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The reason that asynchronous electromotor winding damages reachs count of processing technique classics, the three-phase asynchronous motor that uses on production, the electric breakdown that belongs to winding to burn out in the breakdown in moving is made an appointment with 85% , orgnaization etc breakdown is made an appointment with 15% , the reason with burned-out winding moves to be short of more or overload carries ground connection of travel, winding and winding photograph occasional circle a short circuit. It is to decide next, rotor attrition, break an account that waits for mechanical respect. The article emphasizes the breakdown matter that burns caustic from winding of electric machinery of electric angle analysis, offer corresponding processing technique. One, be short of move 1.

Breakdown phenomenon electric machinery cannot start, although carry for nothing,can rise start, rotate speed rises slowly, have buzz; Electric machinery fume is calorific, accompany have burn scorching. 2.

The examination tears open next electric machinery to carry a lid as a result, can see winding carries a ministry to have 1/3 or 2/3 extremely photograph winding or anxious or become nigger-brown. 3.

Breakdown reason and processing technique (1) loop of silk of frit of loop of electromotor power supply is contacted undesirable or suffer damage, cause fusing of silk of some photograph frit. (2) specifications of silk of frit of three-phase of loop of electromotor power supply is different, allow hidebound frit silk to be burned. Should according to electromotor power volume, change for the frit silk with identical norms. (3) the switch in loop of electromotor power supply (switch of lid of switch-disconnector, glue) the contact touching a head that reachs contactor is undesirable (burn or pine take off) . Repair is adjusted move, static touch a head, made contact is good. (4) some photograph lacks route. Fish breaks line point, join firm. (5) electromotor winding connects space empty solder, bring about a contact undesirable. Check electromotor winding jumper seriously and weld. 2, overload moves 1.

Electric current of breakdown phenomenon electromotor exceeds rating; Electromotor temperature rise exceeds rated temperature rise. 2.

Examination result electric machinery 3 groups of winding are all burn down; Bearing does not have grease or arenaceous wear attaint; Calm, rotor core photograph grinds, common says to sweep chamber. 3.

Breakdown reason and processing technique (1) when load is overweight, should consider to be decreased appropriately carry or change the electromotor with proper size. (2) exorbitant or power source voltage is too low, need to add stabilized voltage of outfit three-phase power source to compensate ark. (3) long-term and serious be affected with damp be affected with damp or mordant gas erode electric machinery, insulation resistance drops. Should according to particular case, undertake heavy repair or changing is the same as a capacity, those who be the same as norms close electromotor. (4) bearing is short of oily, dry grind or rotor machinery is different heart, bring about electromotor rotor to sweep chamber, make electromotor electric current exceeds rating. Answer to inspect bearing wear out condition seriously above all, if unqualified need to change new bearing; Next, clean bearing and infuse is right amount grease. Check electromotor to carry a lid next, if carry lid center aperture to cause rotor because of wearing away,differ heart, should undertake handling to carrying a lid or change. (5) orgnaization drive part malfunctions, cause electromotor overload and winding of burned-out electric machinery. Check the breakdown that mechanical part exists, adopt measure processing to solve, made roll is agile. 3, winding ground connection 1.

Sky of breakdown phenomenon electric machinery carries cannot start; Fusing of silk of frit of loop of electromotor power supply or switch tripping operation. 2.

Winding of notch of examination result stator and core have burn mark, have cupreous melting point; The winding inside groove and core puncture; Winding is derivative the line is cortical insulation attaint. 3.

Breakdown reason and processing technique (1) electromotor is when repair, a place of strategic importance enters bamboo wedge carelessly, make notch winding insulation is destroyed; Bamboo wedge year long ageing, insulation is undesirable. Should get offline by electric machinery craft chooses wedge of high grade bamboo, do good insulation processing. The attention when getting offline does not make lead of bamboo wedge cut. (2) to long-term be affected with damp be affected with damp or the electromotor that work in caustic gas, should change to close model electromotor. (3) open type electromotor cuts bits to enter because of metal or metal make winding insulation is destroyed inside electromotor. To this, should be all round electric machinery add fortify to protect a net or prevent fender. (4) rotor is balanced piece become loose or fall off, blow insulation of broken electromotor winding. Should will balance a readjust good position to be secured, handle good winding breakage. (5) to having lightning arrester or lightning arrester invalidation, should add set lightning arrester or lightning arrester of new desired result. 4, short circuit of winding alternate with 1.

Breakdown phenomenon electric machinery cannot start; Fusing of silk of frit of loop of electric machinery power supply or switch tripping operation; Electric machinery winding is fumy, have burn scorching. 2.

Many lead that checks place of short circuit of result alternate with is burned, there is cupreous melting point all round its. 3.

Breakdown reason and processing technique (1) to getting offline when the electromotor with cut of lead surface insulation or bad insulation of winding end ministry, answer to carry the wire of burn, the solder after clearing is good, wrap good insulation planish, after groove is being entered below, brush on insulating varnish and stoving. If cannot when repair, should press raw data rewind. (2) reach even the line between winding cite the bushing of the line must suit with the insulation grade photograph of electromotor winding, the insulated sleeve that connects a line should compare solder dot to grow 15 ~ 25mm. 5, winding circles a short circuit 1.

Breakdown phenomenon electric machinery is fumy in movement, local temperature rise is exorbitant, have burn scorching. 2.

Electric current of three-phase of examination result electromotor is lopsided; A few v/LIT all over the ground or a coil becomes bare wire. 3.

Breakdown reason and processing technique (1) burned-out a few v/LIT all over the ground or when a coil, if groove is full rate is not high, can undertake wearing circling repairing. (2) others refers to the 4th processing technique. Discover in time and eliminate electric equipment malfunction quickly, can prevent the happening of the accident, ensure production goes on wheels. To this, must be checked regularly according to the regulation and maintain electric facility, accurate judgement and the operational failure that treat electric equipment, reduce equipment accident loss, assure to produce on the rails.

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