The motor is used so often in the case will inevitably be prone to failure, then you know how to repair it is good? The following is my motor failure repair tips for you to organize, I hope to help you.
Tips for repairing motor failuresTrouble phenomenon 1: the motor can not start after turning on
Causes and treatment:
1, stator winding wiring error? Check the wiring, correct the error
2, stator winding disconnection, short-circuit grounding, winding rotor electric motor winding disconnection? Find the point of failure, troubleshooting
3, the load is too heavy or drive mechanism is stuck ? Check the transmission mechanism and load
4, wound rotor motor rotor circuit open circuit (brush and slip ring contact, varistor disconnection, poor lead contact, etc.)? Find out the point of disconnection, to repair
5, the power supply voltage is too low? Check the cause and exclude
6, the power supply is out of phase? Check the line, restore the three-phase
Trouble phenomenon 2: motor temperature rise is too high or smoke
Reasons and treatment methods:
1, too heavy a load or start too often ? Reduce the load, reduce the number of starts
2, the running process of the missing phase ? Check the line, restore three-phase
3, stator winding wiring error ? Check the wiring, to be corrected
4, stator winding grounded, turn to turn or phase to phase short circuit? Find out the grounded or short-circuited parts, to be repaired
5, cage-type rotor winding broken bars? Replace the rotor
6, winding rotor winding phase operation? Find the fault point, and repair
7, stator and rotor friction ? Check the bearings, rotor deformation, repair or replacement
8, poor ventilation? Check whether the air ventilation is unobstructed
9, the voltage is too high or too low ? Check the causes and exclude
Trouble phenomenon 3: motor vibration
Causes and treatment:
1, rotor imbalance? Calibrate the balance
2, pulley imbalance or shaft extension bending? Check and correct
3, motor and load axis is not aligned? Check and adjust the axis of the unit
4, the motor is not properly installed? Check the installation and foot screws
5, the load is suddenly too heavy ? Reduce the load
Trouble phenomenon 4: running with a strange sound
Causes and treatments:
1, stator and rotor friction? Check the bearings, rotor deformation, repair or replacement
2, bearing damage or poor lubrication? Replace the bearings, clean the bearings
3, the motor is running out of phase ? Check the break point and repair
4, the wind blade touching the casing? Check and eliminate the fault
Failure phenomenon 5: motor with a load when the speed is too low
Causes and treatment:
1, the power supply voltage is too low? Check the power supply voltage
2, the load is too large? Check the load
3, cage rotor winding broken bars? Replace the rotor
4, winding rotor line group a phase of poor contact or disconnection? Check the brush pressure, brush and slip ring contact and rotor winding,
Trouble phenomenon VI: motor shell charged
Causes and treatment:
1, poor grounding or grounding resistance is too large ? According to the provisions of the ground wire, to exclude poor grounding fault
2, the winding is damp? Drying treatment
3, insulation damage, lead to shell ? Dip paint to repair insulation, reconnect the leads.
Maintenance rules of the electric car motor1, when you use the electric car in the process, generally do not need to motor internal components for maintenance and maintenance, only need to pay attention to check the electric hub mounted on the back of the fork pieces of the fasteners state, if you find that there is a loose nut phenomenon should be promptly tighten the nut or ask professionals to check the processing.
2, when the motor stops running, timely removal of motor external dust, sludge, keep the motor clean to prevent oil, water into the motor interior, clean, do not use water directly spray punch.
3, check whether the motor lead wire is scratched, whether the motor running noise, if necessary, should be sent to the Yadi store to deal with, need to ask professionals to check and deal with.
4, there are equipped with a chain motor should be regularly lubricated to the chain.
The main purpose of various motors
1, servo motor
Servo motor is widely used in various control systems, can be converted into the input voltage signal on the motor shaft of the mechanical output, dragging the controlled components, so as to achieve the purpose of control.
Servo motor has DC and AC, the earliest servo motor is a general DC motor, in the case of control precision is not high, before the use of general DC motor as a servo motor. DC servo motor from the structure, is a small power DC motor, its excitation more armature control and magnetic field control, but usually use the armature control.
2, stepper motor
Stepper motor is mainly used in the field of CNC machine tool manufacturing, due to the stepper motor does not require A/D conversion, can be directly converted to digital pulse signals into an angular displacement, so it has been regarded as the ideal CNC machine tool actuating elements.
In addition to their application in CNC machine tools, stepper motors can also be used in other machinery, such as as motors in automatic feeders, as motors in general-purpose floppy disk drives, and also in printers and plotters.
3, torque motor
The torque motor is characterized by low speed and large torque. Generally in the textile industry often use AC torque motor, its working principle and structure and single-phase asynchronous motor of the same.
4, switched reluctance motor
Switched reluctance motor is a new type of speed motor, the structure is extremely simple and sturdy, low cost, excellent speed performance, is a strong competitor of the traditional control motor, has a strong market potential.
5, brushless DC motor
Brushless DC motor mechanical characteristics and regulating characteristics of good linearity, wide speed range, long life, easy maintenance and low noise, there is no brush caused by a series of problems, so this motor in the control system has a great deal of applications.
6, DC motors
DC motors have good speed performance, easy to start, able to carry heavy starting and other advantages, so DC motors are still widely used, especially after the emergence of silicon controlled DC power supply.
7, asynchronous motor
Asynchronous motor has a simple structure, manufacturing, easy to use and maintain, reliable operation and smaller quality, lower cost and other advantages. Asynchronous motor is widely used to drive machine tools, pumps, blowers, compressors, lifting and winching equipment, mining machinery, light industrial machinery, agricultural and sideline product processing machinery and most of the industrial and agricultural production machinery, as well as household appliances and medical equipment.
More applications in household appliances, such as fans, refrigerators, air conditioners, vacuum cleaners and so on.
8, synchronous motors