6. When the motor is unloaded and overloaded, the ammeter pointer is unstable and swings
1. Cause of failure
(1) The cage rotor guide bar is welded or broken;
(2) Winding rotor fault (one-phase break) or poor contact of brushes and collector ring short-circuit devices.
2. Troubleshooting
(1) Repair or replace the rotor if the broken bar is found;
(2) Check the winding rotor circuit and repair it.
7. The no-load current of the motor is balanced, but the value is large
1. Cause of failure
(1) When repairing, the number of turns of the stator winding is reduced too much;
(2) The power supply voltage is too high;
(3) Y is connected to the motor by mistake for Δ;
(4) In the assembly of the motor, the rotor is reversed, so that the stator core is not aligned and the effective length is shortened;
(5) The air gap is too large or uneven;
(6) When overhauling and dismantling the old winding, the thermal dismantling method is used improperly, which burns the iron core.
2. Troubleshooting
(1) Rewind the stator winding to restore the correct number of turns;
(2) try to restore the rated voltage;
(3) Reconnect to Y;
(4) reassembly;
(5) Overhaul the core or recalculate the winding, and increase the number of turns appropriately.
8. The sound of the motor is abnormal and abnormal when it is running
1. Cause of failure
(1) The rotor rubs with the stator insulating paper or groove wedge;
(2) The bearing is worn or there are foreign substances such as sand particles in the oil;
(3) The stator and rotor core is loose;
(4) Lack of oil in the bearing;
(5) Air duct tamponade or fan wipe hood,
(6) The stator and rotor cores rub each other;
(7) The power supply voltage is too high or unbalanced;
(8) The stator winding is misconnected or short-circuited.
2. Troubleshooting
(1) Trim the insulation and cut the groove wedge;
(2) Replace the bearing or clean the bearing;
(3) Overhaul stator and rotor cores;
(4) Refueling;
(5) Clean the air duct; re-installation;
(6) Eliminate scratches, small rotors in the car if necessary;
(7) Check and adjust the power supply voltage;
(8) Eliminate stator winding faults.
9. The motor vibrates greatly during operation
1. Cause of failure
(1) Due to excessive clearance of worn bearings;
(2) uneven air gap;
(3) Rotor imbalance;
(4) Bending of the rotating shaft;
(5) The core is deformed or loosened;
(6) The center of the coupling (pulley) is not corrected;
(7) The fan is unbalanced;
(8) The strength of the casing or foundation is insufficient;
(9) The anchor screw of the motor is loose;
(10) Cage rotor open welding and open circuit; Wound rotor break; Plus stator winding failure.
2. Troubleshooting
(1) Overhaul bearings and replace them if necessary;
(2) Adjust the air gap to make it uniform;
(3) Correct the dynamic balance of the rotor;
(4) Straighten the rotating shaft;
(5) Correction of overlapping cores,
(6) Recalibrate to conform to the regulations;
(7) Overhaul the fan, correct the balance, and correct its geometry;
(8) Carry out reinforcement;
(9) Fastening anchor screws;
(10) Repair the rotor winding; Repair of stator windings.
10. The bearing is overheated
1. Cause of failure
(1) Too much or too little slippery grease;
(2) The oil quality is not good, and it contains impurities;
(3) The bearing is not properly matched with the journal or end cover (too loose or too tight);
(4) The inner bore of the bearing is eccentric and rubs with the shaft;
(5) The motor end cover or bearing cover is not flattened;
(6) The coupling between the motor and the load is not corrected, or the belt is too tight;
(7) The bearing clearance is too large or too small;
(8) Motor shaft bending.
2. Troubleshooting
(1) Add grease (1/3-2/3 of the volume) according to the regulations;
(2) Replace the clean lubricating grease;
(3) If it is too loose, it can be repaired with binder, and if it is too tight, it should be turned and the inner hole of the journal or end cover should be ground to make it suitable;
(4) Repair the bearing cover and eliminate the friction point;
(5) reassembly;
(6) Re-calibrate and adjust the belt tension;
(7) Replace the new bearing;
(8) Correct the motor shaft or replace the rotor.
11. The motor is overheated or even smoked
1. Cause of failure
(1) The power supply voltage is too high, which greatly increases the heating of the iron core;
(2) The power supply voltage is too low, the motor is running with rated load, and the current is too hot for the winding;
(3) When repairing and dismantling the winding, the thermal dismantling method is improper, which burns the iron core;
(4) The stator and rotor cores rub against each other;
(5) The motor is overloaded or starts frequently;
(6) Cage rotor broken strip;
(7) The motor lacks phase and runs in two phases;
(8) After rewinding, the winding impregnation paint is insufficient;
(9) The ambient temperature is high, and there is a lot of dirt on the surface of the motor, or the ventilation duct is blocked;
(10) Motor fan failure, poor ventilation; Stator winding faults (phase-to-turn, turn-to-turn short circuits; The internal connection of the stator winding is incorrect).
2. Troubleshooting
(1) Reduce the power supply voltage (such as adjusting the tap of the power supply transformer), if it is caused by the wrong connection method of the motor Y and Δ, the connection method should be corrected;
(2) Increase the power supply voltage or change the thick power supply wire;
(3) Overhaul the iron core and eliminate faults;
(4) Eliminate friction points (adjust air gaps or frustrations, car rotors);
(5) load shedding; Control the start according to the specified number of times;
(6) Check and eliminate rotor winding faults;
(7) Resumption of three-phase operation;
(8) Adopt secondary dipping and vacuum dipping process;
(9) Clean the motor, improve the ambient temperature, and adopt cooling measures;
(10) Check and repair the fan, and replace it if necessary; Overhaul the stator windings to eliminate faults.
|
More on that
|
Buke successfully passed the fourth batch of specialized, special and new "little giant" enterprise identification
Recently, the Ministry of Industry and Information Technology of the People's Republic of China has completed the review of the fourth batch of specialized, special and new "little giant" enterprise cultivation, and publicized the list of enterprises that have passed the review.
|
|
Common models of Buke inverters
Common models of Buke inverters
Buke CV100 series mini inverter
The output frequency is 0-300Hz
The carrier frequency is up to 15kHz, which effectively reduces the noise of the inverter
It is equipped with RS-485 communication port as standard and supports Modbus communication protocol
Sleep/wake function, inner ...
|
|
Buke human-machine interface - the basic function of human-machine interface products
1) The working status of the equipment is displayed;
2) Data and text input operation, printout;
3) Production formula storage, equipment production data recording;
4) simple logical and numerical operations;
5) It can be connected to a variety of industrial control equipment networking.
...
|
|
Buke servo motor - wiring connection of servo motor encoder
(1) Wiring should be done with the power supply OFF, and if the output line is in contact with the power supply when the power is turned on, the output circuit may be damaged.
(2) If the wiring is incorrect, the internal circuit may be damaged, so pay full attention to the polarity of the power supply when wiring.
(3) If and high-voltage lines, ...
|
|
How to solve the problem that the touch screen of Buke does not respond?
1. Check whether the joints of each connecting line are loose;
2. Check whether there is a conflict between the serial port and the abort number, and if there is a conflict, the resources should be adjusted to circumvent the conflict. Then check whether there are gaps in the surface layer of the human-machine interface, and if there are gaps, they should be replaced immediately. It also needs to be inspected ...
|
|
Buke servo motor - the detailed steps of the zero point adjustment of the servo motor encoder
1. Remove the damaged encoder
2. Install a new encoder on the damaged motor
3. Find the Z signal and two power cords according to the figure, the general power supply is 5V.
4. Prepare a 24V and 5V output switching power supply with a slightly modified open circuit alarm and ...
|
|
Buke HMI - What principles should be considered in the design of HMI?
1. The basic design principle of user-centered
In the design process of the system, the designer should grasp the characteristics of the user and discover the user's needs. In the whole development process of the system, it is necessary to continuously solicit the opinions of users and consult with users. The design decision of the system should be combined with the user's work.
|
|
Buke servo motor - how to detect the quality of three-phase AC motor?
1. Shake the meter, 500V can shake the meter, and shake the insulation resistance of the line on the three binding posts to the motor shell, which should be above 0.5M ohm, which means that there is no short circuit to the ground (Yantai motor maintenance).
2. Multimeter measurement: measure the resistance between the three phases of A/B/C, whether it is equal, it should be about the same...
|
|
Buke servo motor - what is the resolution of the servo motor encoder?
1. The first difference between a servo encoder (synchronous service motor) and an ordinary encoder is that it provides sensing signal feedback for the commutation of the starting current. The main performance indicators of servo motor encoders are shift rate, accuracy, and repeatability.
1) Routinely mentioned 17-bit to 25-bit singleturn resolution ...
|
|
Buke servo motor - the maintenance method of the motor
1. Clean the motor and remove the dust and sludge outside the motor base in time. If there is a lot of dust in the environment, it is best to clean it once a day.
2. Check and wipe the motor terminals. Check whether the junction box wiring screws are loose or burned.
3. Check the screws of each fixing part, ...
|
|
Buke servo motor - precautions for servo motor encoders
Do not apply direct impact to the shaft during installation.
The connection between the servo motor encoder shaft and the machine should use flexible connectors. When attaching connectors to the shaft, do not press them in. Even if a connector is used, it is possible to add a load greater than the allowable load to the shaft due to poor installation, ...
|
|
How to accurately control the torque of the Stepco servo motor - synchronous motor?
1. The indicated value is large (or out of range).
According to the investigation of our staff, this kind of problem often appears in the atmospheric pressure workshop. When we find that the counterweight of the float in the float level gauge is at a low point, the liquid level must be very high at this time, and the glass plate is inconsistent with the indication of the instrument.
|
|
Buke servo motor - what is the main function of servo motor encoder
1. Servo motor encoder is a product installed on the servo motor, which is equivalent to a sensor.
2. Do speed closed-loop and azimuth closed-loop to complete accurate speed regulation and accurate azimuth control.
3. The servo motor has its own encoder, which can be converted into servo electronic gears.
|
|
The causes and solutions of the shutdown of the Buke motor due to pollution
Reasons for the shutdown of the speed up Buke motor due to contamination:
1. Bearing lubrication failure or bearing surface damage
Contaminants can disrupt bearing lubrication and damage bearing surfaces. This will cause the friction to generate heat. If the problem cannot be solved, the increased heat may cause the bearing and the ...
|
|
Buke servo motor - common faults and solutions of servo motor encoders
1. Encoder connection line failure: This kind of failure has the highest probability and is often encountered in maintenance, so it should be a priority factor. Often, encoder cables are open, short, or in poor contact, so the cable or connector needs to be replaced. Special attention should also be paid to whether the cable is loose and causes open soldering or ...
|
|
Buke servo motor - what is the difference between servo motor and control motor? How to choose a motor?
What are the main differences between the two?
1. The way of control is different
Stepper motor: The rotation angle is controlled by controlling the number of pulses, and one pulse corresponds to a step angle.
Servo motor: The angle of rotation is controlled by controlling the length of the pulse time.
2. Work ...
|
|
Buke servo motor - what are the parameter settings of servo motor drive?
1. Position proportional gain
Set the proportional gain of the position ring adjuster; The higher the set value, the higher the gain, the greater the stiffness, and the smaller the position lag under the same frequency command pulse. However, too large a value may cause oscillation or overshoot; The parameter values are determined by the specific servo system type ...
|
|
Buke touch screen - touch screen touch no response fault causes and treatment methods
Cause of the failure
1) The sound wave reflection stripes on the four periphery of the surface sound wave touch screen are seriously dusty or scale, resulting in the touch screen not working.
2) The touch screen is malfunctioning.
3) The touch screen control card is faulty.
4) The touch screen signal line is faulty ...
|
|
Buke servo motor - introduction to the control mode of DC servo motor
There are two main control methods of DC servo motor: one is armature voltage control, that is, under the condition that the stator magnetic field remains unchanged, the speed and output torque of the motor are controlled by controlling the voltage signals applied to both ends of the armature winding; The other is the excitation field control, that is, by changing the ...
|
|
Buke servo motor - the regular maintenance content of AC motor
1. Wipe the motor. Remove the dust and sludge on the outside of the motor base in time. If there is a lot of dust in the environment, it is best to clean it once a day.
2. Check and wipe the motor terminals. Check whether the junction box wiring screws are loose or burned.
3. Check the screws of each fixed part ...
|
|
Contact
working hours
