Three-phase ac servo motor servo motor used widely, but through the long run, will attack all kinds of fault, identifying the cause of the problem in time, the corresponding processing, is to avoid failure, ensure the normal operation of equipment, an important assignment. A, after electrify servo motor can not rotate, but no ring, no peculiar smell and smoke 1. The cause of the problem (1) the power did not pass,At least two phase not pass); (2) the blown fuse (At least two mutually fusing); (3) overcurrent relay adjusted too small; (4) control equipment wiring fault 2. Fault sweep (1) check the power supply circuit switch, fuse, junction box, is there a breakpoint, correction; (2) check the fuse model, fusing the reason, a new fuse; (3) regulate the set values for the relay and motor cooperation; (4) correct wiring two, after electrify hum 1 servo motor does not turn. The cause of the problem (1) rotor winding circuit (A phase of bolt)Or loss of electric power supply a photograph; (2) winding lead beginning end wrong or winding inside the; (3) the power supply circuit of loose contact, contact resistance; (4) the motor load is too large or rotor stuck; (5) the power supply voltage is too low; 6 small motor installed too tight or bearing grease is excellent; All landowners bearing stuck. 2. Fault sweep (1) find out the breakpoint corrected; (2) check the winding polarity; Discriminant winding ends is correct; (3) fastening screw loose wiring, use multimeter to judge all joints are false, be corrected; (4) the lightening or find out and eliminate mechanical failure; 5. Check if the specified surface connection misconnection. Whether is because the power supply wire carefully make the pressure drop is too large, corrected; 6. Reinstall the flexible; Replace the qualified grease; All landowners fixed bearing. Third, servo motor starting difficulty, additional load, motor speed is lower than the extra speed more 1. The cause of the problem (1) the power supply voltage is too low; (2) the surface connection motor misconnection. (3) the rotor welding or fracture; (4) rotor local coil receive, pick the wrong; (3) correction of motor winding when add the number of turns too much; (5) motor overload. 2. Fault sweep (1) measurement of the power supply voltage, trying to improve; (2) the correct connection; (3) to check open welding and breakpoint and correction; (4) found it by accident, shall be corrected; (5) to restore the correct number of turns; 6. Lightening. Fourth, the motor no-load current imbalance, three-phase differ big 1. The cause of the problem (1) winding tail end of the first wrong; (2) power supply voltage imbalance; (3) winding interturn short circuit, the coil reverse connection failure, etc. 2. Fault sweep (1) check and correct; (2) measurement of the power supply voltage, trying to eliminate imbalance; (3) to eliminate winding faults. Five, the operation of the servo motor noise is not normal, has sounded the cause of the problem (1) oil bearing wear or with sand and other foreign bodies; (2) loose rotor iron core; (3) bearing oil shortage; (4) the power supply voltage is too high or imbalance. Fault removing replace bearings or clean bearing; (2) repair the rotor iron core; 3. Come on; (4) check and adjust the supply voltage.
