views:
1. The motor speed is abnormal or difficult to start
CAUSE Or when the end voltage is less than 5% of the rated voltage).
Treatment: Seriously check the action, contact and coupling of the electric control cabinet to the various parts of the motor, identify the cause, and troubleshoot. Evenly puffed, try to reduce the saturnal stop; cause a saturated shutdown in the accident, and then use the auxiliary motor to operate the grinder to start the high-pressure start, prevent high-voltage forced to start, and the hard start is forbidden. Check the power supply voltage, adjust the power transformer power side allocation switch according to the power system, so that the rated voltage is reached to meet the startup requirements.
2, rotor lead wire noseble break
CAUSE: The line nose flow is small; because the vibration causes loose or wiring, it is not tested, resulting in a larger contact resistance increases.
Treatment: This problem is more intuitive, as long as it uses the appropriate material, the cross section is used to check, and the vibration source is eliminated in time to prevent the joint oxidation and loose.
3, brush fire
CAUSE Improper pressure is not proper or uneven; the brush is used improperly, the size does not match, the contact surface is small, and the amount of carrier is not enough; the brush is in the brush box.
Treatment method: Pay attention to clean the dirt and use the fine sand cloth of 120 to polish the surface of the slip ring to ensure the brush and good contact. Regular inspection and adjustment of the brush pressure to a balanced place, prevent the pressure and tight size. According to the original manufacturer's design, select the brush number and size to ensure that the brush contact area and the carrier flow are in line with the requirements. Clean the brush box or slightly smaller the electric brush, so that it can be free to follow.
