Analysis and troubleshooting of AC servo motor faults
1. After the power is turned on, the motor can't rotate, but there is no abnormal noise, no smell or smoke.
Fault reason: 1 power supply is not open (at least two phases are not open); 2 fuse is blown (at least two phases are blown); 3 overcurrent relay is adjusted too small; 4 control device wiring error.
Troubleshooting: 1 Check the power circuit switch, fuse or junction box for breakpoints, repair; 2 check fuse type, fuse cause, replace fuse; 3 adjust relay setting value with motor; 4 correct wiring.
Second, the motor does not turn after the power is turned on.
Fault reason: 1 rotor winding has open circuit (one phase disconnection) or power supply phase loss; 2 winding lead wire is connected to the wrong end or the inner winding is reversed; 3 power circuit contact is loose, contact resistance is large; 4 motor load is too large Or the rotor is stuck; 5 the power supply voltage is too low; 6 small motor assembly is too tight or the bearing grease is too hard; 7 bearing stuck.
Trouble-shooting: 1 Check the breakpoint to repair; 2 Check the winding polarity; determine whether the winding end is correct; 3 tighten the loose wiring screw, use a multimeter to judge whether the joints are falsely connected, and repair; 4 load-reduction or detection Eliminate mechanical failure, 5 check whether the specified surface connection method is misconnected; whether the voltage drop is too large due to the excessive power supply wire, correct it, 6 reassemble to make it flexible; replace the qualified grease; 7 repair the bearing.
Third, the motor is difficult to start, when the rated load, the motor speed is lower than the rated speed
Fault reason: 1 power supply voltage is too low; 2-side connected motor is misconnected; 3 rotor is open-welded or broken; 4 rotor local coil is misconnected and reversed; 3 is too much to increase the motor winding; 5 motor overload.
Troubleshooting: 1 measure the power supply voltage, try to improve; 2 correct the connection; 3 check the open welding and breakpoints and repair; 4 find the misconnection, correct it; 5 restore the correct number of turns; 6 load shedding.
