8. The motor's no-load current is balanced, but the value is large
8.1 fault reason: when the stator winding is repaired, the number of turns decreases too much;Parliamentary power supply voltage is too high;(3) Y after motor misconnection Δ;In the assembling of motors, the rotor is installed backward, so that the stator iron core is not aligned and the effective length is reduced.Correspondingly large or uneven air gap;When the old winding is removed in a large repair, improper thermal removal method is used to burn the iron core.And so on.
8.2 troubleshooting: the stator winding is rewound, and the correct number of turns is restored;Parliamentary attempts to restore the rated voltage;So we're changing theta to Y;Automation reassembling;Resizing new rotor or adjusting air gap;Checking iron core or recalculating winding, increase turns appropriately.
9. When the motor is running, the noise is abnormal and there is abnormal noise
9.1 fault reason: the rotor is rubbed against the stator insulator paper or groove wedge;Alien substances such as sand particles in aluminum compounds bearing wear or oil;Torque rotor core looseness;Automation bearing oil deficient;Flow channel stuffing or fan scrubbing hood, so that the fixed rotor iron core rub;The PC power voltage is too high or unbalanced.Faulty connection or short circuit of the radial stator winding;And so on.
9.2 troubleshooting: trim the insulation and trim the low-groove wedge;Replacing or cleaning bearings;Torque for maintenance fixing and rotor core;(4) come on;Rinsing air duct;Reinstall;A small rotor within the vehicle is removed if necessary.To check and adjust the power supply voltage;So let's eliminate the stator winding fault.
10. The motor vibration is large in operation
10.1 reasons for failure: excessive clearance of worn bearing;Inhomogeneous air gap;Torque rotor imbalance;Superior spindle bending;Mutually deformed or loose iron core;Bearing coupling (belt pulley) center uncorrected;It's unbalanced.Less chassis or base strength;The screw on the base of the motor is loose;Open welding circuit of the rotor of the pilot-cage type;Wound rotor break;Stator winding failure;And so on.
10.2 troubleshooting: repair the bearing and replace it if necessary;Substances adjusts the air gap to make it even.Torque calibration rotor dynamic balance;Computerized spindle system;Flow correction overlapping iron core, so that it can be recalibrated to meet the requirements;Tool inspection fan, correct balance, correct its geometric shape;So this one is strengthened with bromine;Screw fastening pin screw.
11. Bearing overheating
11.1 cause of failure: too much or too little grease;Circulating oil has poor quality and contains impurities;Improper fit of the torque bearing with the journal or end cover (too loose or too tight);Spindle bearing eccentric inner hole, rubbing against shaft;Motor end cover or bearing cover not flat;Bearing motor and load coupling uncorrected, or belt too tight;Marks bearing clearance is too large or too small;Student: so the axis of the neutron motor is bent;And so on.
11.2 troubleshooting: use the specified lubricating grease (1/3 to 2/3 of the volume);Circulating resin replacement for clean lubricating grease;The adhesive can be used to repair the looseness, tighten the car, and grind the shaft neck or end cover inner hole to make it fit.Repairing bearing caps to eliminate rubbing points;Flow reassembly;After recalibration, adjust the belt tension;To replace the new bearing;Shorter calibration motor shaft or rotor replacement.
12. The motor is overheating or even smoking
12.1 fault reason: the over-voltage of the power supply makes the core heat greatly increased;The electric power supply voltage is too low, the motor runs with rated load, and the current heats up over the ambassador winding.When repairing and removing the winding, the improper thermal disassembly method is adopted to burn the iron core.Waste rotor core rubbing;Flow motor overload or frequent start;Turtle cage rotor broken rod;Using the tool motor with missing phase and two-phase operation;Due to insufficient winding dip painting after rewinding;Surface fouling on motors with high ambient temperature or air duct blocking;And so on.
12.2 troubleshooting: (1) reduce the supply voltage (e.g., adjust the power supply transformer tap), and if the motor Y, Δ connection errors, you should correct connection;String increasing power voltage or thickening power supply wire;Troubleshoot the furnace core;To eliminate chafing points (adjust air gap or tumbler, car rotor);5. Lightening;Control starting according to the specified number of times;Run check and eliminate rotor winding failure;Slash restores three-phase operation;Sunflower USES secondary and vacuum painting process;The motor is cleaned to improve the ambient temperature and cooling measures are adopted.