Burnt high pressure fan motor, is a high pressure blower using commonfault process. Caused by motor burnout are: motor phase, motoroverload, caused by mechanical failure etc..

By the statistics, the three-phase asynchronous motor used in the production, electrical fault in the operation of the genus winding about 85%, agencies and other fault about 15%, namely: reasons for winding burn much phase deficient operation or overload operation, windinggrounding and winding interphase or inter turn short circuit. (Star runningtime, destroyed two phase winding, triangle operation, will burn a phase winding.)

Secondly, the rotor friction (motor sweep chamber), causes of broken barbearing apart and other mechanical aspects (the motor for the performance of a group of line breaker, not black, motor burned). But theelectrical causes high pressure blower motor burn was the most common,is very complex, some customers tend to shirk responsibility, in order toDongshan science and technology high pressure fan warranty policy as an excuse, often make some excessive unreasonable demands, in order to help the majority of sales staff, the real reason for the high pressure blower motor burned discrimination, this paper from the electrical motor winding loss reasons, and puts forward the corresponding processing method.

A, phase lack operation

3 fault causes and treatment methods: (1) the motor power supply circuitfuse circuit or poor contact caused by mechanical damage, a phase fuse;(2) the motor power supply circuit of the three-phase fuse different specifications, fuse capacity small burn.

According to the power of the motor size, replacing the fuse for the same specification; (3) switching circuit power supply in the electric motor(isolating switch, rubber lid switch) bad contact and contactor (burns orloose).

Repair and adjust the static contact, keep good contact; (4) a phase tophase line. Find out a gap, and firm connection; (5) the motor windingconnection between weld, resulting in poor contact. Find out a gap, andfirm connection; (5) the motor winding connection between weld, resulting in poor contact. Carefully check the motor winding connection line andwelding. Two, overload

1 fault phenomenon: high pressure fan in the long-term operation of a high pressure area, which leads to the motor shaft power increases, the motor current exceeds the rated value; exceed the rated temperature rise of motor temperature rise.

1 fault phenomenon: high pressure fan in the long-term operation of a high pressure area, which leads to the motor shaft power increases, the motor current exceeds the rated value; exceed the rated temperature rise of motor temperature rise. Or foreign body aspiration pressure fan,motor overloaded operation, or motor bearings no grease or sand shelfdamage; Ding, rotor core phase friction, commonly known as the sweep chamber.

Results: three groups of 2 motor winding burned.

3 fault causes and treatment methods: (1) when the high pressure fan in the long-term operation of a high pressure area, the motor should beappropriately relief or replace the appropriate power; (2) foreign body aspiration pressure fan, which makes the motor overload and burn outthe motor winding. Front end check the high-pressure blower to take measures to deal with foreign body, the flexible rotation; (3) the power supply voltage is too high or too low, need to be equipped with the three-phase power supply voltage compensation cabinet. Motor serious long-term moisture or corrosive gas, insulation resistance degradation; (4)bearing is short of oil, dry grinding or rotor misalignment, lead to motor rotor sweep chamber, so that the motor current exceeds the rated value.First, you should carefully check the wear of bearings, if not qualified to replace new bearing; secondly, cleaning bearings and injection amount of grease. Then check the motor end cover, if the center hole of the end cap due to wear the rotor misalignment, deal with the end cover is processed or replacement.

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