When the wrong motor connected in star delta connection, the motor still with a full load, the current flow through the stator windings exceed the rated current is to cause the motor self-parking, stop a little longer and not turn off the power, not only windingsevere overheating will be burned. When the star-connected motor wrong then into a triangle will windings and core overheating, severe burned wiring.

Analysis of inspection: from the appearance point of view to the front cover cracking, remove the check ended mouth elliptical, shaft misalignment, resulting in unilateral magnetic force, resulting in the running resistance and stall, the bearing damage. Repair methods: welding end caps, and eliminate welding stress treatment, only the mouth by correcting the replacement of the bearings and grease. The motor is running without vibration and overheating.

The cause of the malfunction (1) power supply voltage is too high, the core greatly increase the heat; (2) power supply voltage is too low, the motor with a rated load operation, the current Ambassador of the winding fever; the ③ repair removal of winding, improper heat demolition method, burns core;④ stator and rotor core rubs; the ⑤ motor overload or frequent starting; ⑥ cage rotor broken bars; (7) motor phase loss, two-phase operation; the ⑧ weight around the stator winding dipping inade

The cause of the fault (1) Grease too much or too little; (2) oil bad quality impurities; (3) bearing journal or end cap mismatch (too loose or too tight); (4) bearing bore eccentric, rub with the shaft; ⑤ motorcover or the bearing cap is not installed level uncorrected; the ⑥ motor load coupling or belt too tight; (7) bearing gap is too large or too small; ⑧ motor shaft bending. Troubleshooting (1) according to the provisions of grease (1/3-2/3 of the volume); (2) replace the clean grease;

A three-phase asynchronous motor does not start after power, only hums. Analysis and examination: three-phase asynchronous motor is powered only hum but not turn the phenomenon, indicating that the power supply is off not one phase melt-off is the motor winding phase circuit, immediately turn off the power and check. The detection result is contact with a poor contact. Repair methods: by adjusting and tuning contactor when closing test in case of no electricity drop-down, three-phase moving co

Y160L-6-11KW motor running current unbalance motor overheating. Analysis of inspection: unstable operation of the aircraft, hand touch the chassis feeling of overheating, the measured load current three-phase unbalanced load throw off, and then measuring the no-load current phase unbalance, measured three-phase winding DC resistance unbalance. The analysis may be winding inter-turn short circuit, to heart pumping check the stator windings, did not identify the part turns overheating and insulat

Energized motor does not turn a buzz l. The cause of the fault (1) stator and rotor winding circuit (phase disconnection) or power a relative loss of power; (2) winding pinout whole story fault termination or winding internal reversed; (3) power circuit contacts loose, the contact resistance; ④ motor load the large rotor stuck; (5) power supply voltage is too low; the ⑥ small motor assembly is too tight or bearing grease perfect; (7) bearing stuck. 2. Troubleshooting (1) identify the breakpo

1.Plus load to check for abnormal vibration and sound, such as abnormal, should stop to check.2.Various parts without local overheating (including wiring).3 plus load all normal speed drops.4. Have abrupt change of the working state of the motor.5.Ministries temperature rise should not exceed the specified value, large motor cooling medium with the motor at the inlet and outlet temperature and cycle oil temperature specified by the manufacturer standards.6 motor vibration shall not exceed the re

1 The type of power supply and voltage are consistent with the motor nameplate power capacity and motor capacity and starting method is appropriate. 2 is appropriate wire gauge, wiring for errors, whether or loose terminals, contact is good. 3 switch and the capacity of the contactor is appropriate, whether the contact is clean, contact is good. 4 Fuses and the rated current of the motor thermal relay capacity matches the thermal relay is reset. 5 Crank flexible string should not exceed the

1.Bearing oil dry, too little lubricant. Bearings should be cleaned and inject new lubricants. 2. The motor bearing leakage Too much oil. General lubricating oil added to two-thirds of the bearing chamber. 3. The belt tension is too tight or the coupling assembly is not in the same line. At this time turning the rotor, to check the belt tension, coupling connection with the case, and make the appropriate adjustments. 4. Bearing Indoor impurities or iron filings and other objects. Available th