SIEMENS 1FT6041 servo motor maintenance
Model: 1FT6041-4AF71
Fault phenomenon: running less than 1 minutes of heat failure
Failure analysis: SIEMENS motor heating causes can be divided into three categories: 1, motor load heat; 2, the environment and the reasons for the heat dissipation of ventilation; 3, the motor itself, the reason.
1, SIEMENS motor load causes of fever
(1) the mechanical failure of the drive to increase the output of the motor, or be stuck without turning or rotating speed sharp decline, so that the motor current surge and overheating.
(2) the working standard of the motor and the working system of the load is not matched, for example, the short period working system of the motor is used to drive the load of continuous and long-term work.
(3) the SIEMENS motor has been running for a long time, and the stator current is much more than the rated current, and the motor is overheated.
(4) the motor starts in the frequent, the start-up time is too long or the start time interval is too short, can cause the motor temperature rise too high.
2, the reasons for the environment and ventilation cooling
(1) dust, motor oil too much, is not conducive to the heat dissipation of the motor.
(2) the wind cover or the motor inside the wind shield is not installed, resulting in poor wind road, poor motor cooling.
(3) motor operating environment and ventilation are too high, the motor can not get a good ventilation cooling and overheating.
(4) fan damage, deformation, loose, or not installed or installed, so that the motor ventilation cooling.
3, SIEMENS motor itself internal reasons
(1) the friction and heating of the rotor.
(2) the cage rotor of the induction motor is broken, or the winding rotor winding is broken. Motor output is insufficient and overheated.
(3) motor bearings overheating.
(4) the heat dissipation of the enclosure of the enclosed motor shell is too much, the heat dissipation area is reduced, or the plug of the protective type electric motor fan can cause the motor to be poor in ventilation and heat dissipation, and the temperature rise is too high.
(5) the installation and maintenance of motor, mistakenly triangle motor winding connection with Y connection, or mistakenly Y connection with the triangle.
(6) the winding phase, the turn to turn short circuit or the ground, causes the winding current to increase, the three-phase current is not balanced, causes the motor to overheat.
(3) pole group coil connecting each phase coil number of incorrect or uneven distribution, resulting in the no-load current of three-phase unbalance, and the current is too large; when the motor is running the three-phase current imbalance, noise and vibration, motor overheating.
According to the above analysis to eliminate the first 2 issues, focusing on 3, according to the motor model to open the shell motor for the brake type, the coil measurement for open circuit replacement test after the normal test.
Hong Jia Wei SIEMENS servo motor maintenance phase, overcurrent, overvoltage, undervoltage, overheating, overload, encoder fault, coil burnout, bearing failure, parameter error, output module, display without damage
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw