What should I do if the motor has a short circuit fault?

After finding out the short circuit of the stator winding of the hydraulic motor, it should be repaired accordingly according to the specific situation. The most likely to occur short circuits are the same level and in-phase, two adjacent coils, upper and lower coils and the outer part of the coil. When the wire insulation of the short-circuit winding of the oil pump motor has not been burned out, it can be repaired locally according to the following 4 methods arranged by Dalan Motor.

If the insulating sleeve on the connecting wire between the polar phase groups is not attached to the groove of the coil, or the insulating sleeve is damaged, it will cause a short circuit in the polar group. Concentric windings often have such short-circuit faults. When repairing, first heat the winding to about 80 to soften the winding insulation, and then pry the lead wire with a marking plate, and put the insulating sleeve to the groove or re-pad the insulation.

The repair of short circuit between the coils, if the bridge wire between the motor coil of the oil pump and other coils in this group is not properly handled, the stacked coil is not properly embedded, and the hammering is too strong during shaping, etc., it will lead to a short circuit between the coils. When the end of the short circuit point ** ring, the insulation can be re-wrapped; If the short circuit point is serious in the groove, only remove the short circuit loop and rewind.

If the armature windings are severely short-circuited, the motor will be burned out. If only a few coils are short-circuited, the motor can still run, but the spark on the surface of the commutator becomes larger, and the armature winding is seriously heated, if it is not found and eliminated in time, it will eventually lead to the motor burning. Therefore, when there is a short circuit fault in the armature winding, it must be eliminated in time.

If you have a wrong understanding of the structure and working principle of the motor, it is not that "the composition of the motor is just enough to make it short circuit and heat up". It's not quite clear what type of homemade motor you're talking about. If it is a DC motor with brushes, even if the resistance of the coil is detected to be very small, in actual work, due to the inductance of the coil, the current in the coil gradually increases from 0 to 0 in the frequent commutation process, and then quickly decreases to 0, and then gradually increases from 0 in reverse.

The current value is never the applied voltage divided by the DC resistance. In the case of AC motors, also due to the inductance of the coil, the actual current is the applied voltage divided by the impedance (the value is (2 fl) 2+r 2), f is the frequency of the supply and l is the inductance), not the voltage divided by the resistance. First of all, check whether there is a package brake at the load end of the motor that is not opened, and then restore the factory settings, re-set the parameters of the motor, do not set anything else, and try again after powering on.

Hope it helps. Pay attention to whether the inverter reports the motor short-circuit fault when accelerating, or the motor short-circuit fault when decelerating. If the fault occurs during acceleration and deceleration, it may be a problem with the IGBT components and return routes of the inverter, too much dust, damaged insulation, etc.; If the fault is reported during operation, the possibility of the motor circuit is large, the line is too long, and the distributed capacitance increases, resulting in the leakage current of the motor and the line exceeding the standard.

Be sure to install an output reactor; Carefully check whether the joints between the motor and the cable are insulated, aging, wet, etc.; The above situation is no problem, it is recommended that the inverter run under load and reduce the frequency to 40Hz. The situation will be under control. <>

Three-phase motors are prone to problems in the process of use, some problems can be solved by themselves, and short-circuit faults can be divided into short circuits between coils, short circuits between polar phase groups and short circuits between turns. The reasons for the short-circuit fault, the cause of the short-circuit fault is many, it may be that the ten operations of the solid embedding process are not skilled enough, or the winding is damp, the motor is overloaded for a long time to make its insulation aging, or the insulation is damaged by poor insulation. These short-circuit problems can be detected by some external observation methods, temperature detection methods, and power-on banquet methods.

When a short circuit occurs at the ends, it is necessary to separate the short circuit points, or insulate them with some wires and dry them with paint. When the ** groove is short-circuited, the short-circuit point can be wiped in the short-circuit area, and it can be re-put into the trunking ten, which is dried with paint. When the number of turns of the winding short circuit point is detected more than 1 12, it needs to be completely removed and re-wrapped.

1) The grounding caused by moisture in the winding should be dried first, and when the hunger is cooled to about 60-70, the insulating paint on the Kai section should be poured and then dried.

2) When the insulation at the end of the winding is damaged, re-insulate at the grounding place, paint it, and then dry it.

3) When the winding grounding point is in the slot, the winding should be rewound or part of the winding components should be replaced.

Finally, the megohmmeter should be used to measure and meet the technical requirements.

When the motor winding is short-circuited, due to the uneven distribution of the magnetic field of the ions, the three-phase current is unbalanced, and the vibration and noise of the motor are aggravated during operation, and the motor can not be started when it is serious, and a large short-circuit current is generated in the short-circuit coil, which causes the coil to heat up quickly and burn out.

Summary. Why does the motor outgoing line open and break will be short-circuited? Hello dear, there are three main reasons for the short circuit between the laps of the motor:

The motor overload or stalled rotor causes the motor to overheat and damage the inter-turn insulation, which may cause a short circuit. The input voltage of the motor is too high, which can cause damage to the inter-turn insulation, and may also cause a short circuit. The motor is used for too long, resulting in the aging of the inter-turn insulation, which may lead to short circuits.

In the beginning of an inter-turn short circuit, only two wires may be in contact due to the erosion of the insulation at the intersection. Due to the circulation in the short circuit turn, the coil heats up rapidly, which further damages the insulation of the adjacent wires, so that the number of turns of the short circuit continues to increase and the fault expands. Hope it helps.

Why does the motor outgoing line open and break will be short-circuited? There are three main reasons for the short circuit between the turns of the motor: the motor overload or stall rotor causes the motor to overheat and damage the insulation between the turns, which may cause the short grinding wheel to be slammed.

The input voltage of the motor is too high, which causes damage to the inter-turn insulation, and may also cause a short circuit. The motor is used for too long, resulting in the aging of the inter-turn insulation, which may lead to short circuits. In the beginning of an inter-turn short circuit, only two wires may be in contact due to the erosion of the insulation at the intersection.

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1. Use the shake meter, that is, the megohmmeter, to measure the insulation resistance of the motor between phases and to the ground, and you can judge whether there is an interphase open circuit and a ground short circuit fault. 2. The interphase short circuit should be untied after the neutral point is unlocked, and the phase-to-phase resistance should be measured with a shake meter, and the triangle should be disassembled and measured. 3. The inter-turn short circuit should use the balance bridge DC resistance tester, and you will know it when you test it.

4. In the case of three-phase voltage balance, the three-phase current of the basic balance of the original and the distribution disorder gradually or suddenly becomes very unbalanced, and at the same time, the temperature rise of the motor increases and the load capacity decreases, and the short circuit between turns of the stator winding of the machine can be preliminarily determined. 5. Test the DC resistance with a bridge, the unevenness of the three-phase DC resistance is large, that is, an inter-turn short circuit occurs in a phase change ** Ming Sell Number: under normal circumstances, the three-phase DC resistance imbalance is 1%, and if it exceeds this value, it means that the coil has the possibility of inter-turn short circuit.

Summary. Hello, glad for your problem, the three-phase motor bearing is broken and causes a short circuit, first of all, you can check the connection inside the machine, if there is an abnormality, you can try to repair the connection or replace the parts to avoid a short circuit. In addition, it is also possible to check the fuse of the machine for damage, and if it is damaged, it should be replaced as soon as possible.

Hello, very happy for your problem, the three-phase motor bearing is broken and causes a short circuit, first of all, you can check the connection inside the machine, if there is an abnormality, you can try to repair the connection or replace the parts to avoid a short circuit. In addition, it is also possible to check whether the fuse of the machine is damaged, and if it is damaged, the limb should be replaced as soon as possible.

Fellow, I really didn't understand, I can be more specific.

Of course, if the three-phase motor in the town is broken, it may cause a short circuit. At this time, the short-circuit circuit should be checked in time, and it should be cleaned up, and then the new bearing should be replaced in time to ensure the normal operation of the three-liquid rolling coarse phase motor.

Summary. Dear, <>

Hello, the teacher received the question: How to repair the motor failure? The answer the teacher gave you is: <>

Dear, hello, the motor fault repair method is as follows: the short circuit point is at the end. You can use insulating materials to separate the short circuit points, or repack the insulated wire, and then paint and dry. <>

Electric machinery (commonly known as "motor") refers to an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Hope it helps. <>

How to repair motor failure?

Dear, <>

Hello, the teacher received the question: How to repair the motor failure? The answer the teacher gave you is: <>

Dear, hello, the motor fault repair method is as follows: the short circuit point is at the end. You can use the envy material to separate the short circuit points, or repack the insulated wire, and then paint and dry it. <>

Electric machinery (commonly known as "motor") refers to an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. We hope you find it helpful. <>

Hello dear, the following is an extended information about your question, which can provide you with reference <>

A fault is a state in which a system is unable to perform a prescribed function. Generally speaking, a fault refers to the failure of some components in the system, resulting in the deterioration of the function of the entire system. The failure of equipment generally has five basic characteristics:

Hierarchical, transmissible, radioactive, delayed, uncertain, etc. I hope it can help you, thank you, <>

Hello Kiss is happy to answer this question for you. How to repair motor failure is as follows: one.

Motor inspection 1External observation method. Check the junction box and winding ends for burning.

2.Thermometric test. Let the motor run for 20 minutes without load, and stop running immediately if there is any abnormality when the operation is closed, and then feel whether the temperature in each place is normal.

3.Energized experiment. If the current in a phase is too large, it means that there is a short circuit.

4.Bridge inspection. Measure the DC resistance of a winding car, and the difference will not exceed 5%.

5.Short Circuit Recon Method. If there is a short circuit in the winding to be measured, the steel sheet will start to vibrate.

6.Multimeter or megohmmeter method. 7.

Voltage drop method. After the three windings are connected in series, low-voltage safe alternating current is passed, and the group that is measured to read the book has a short-circuit fault. 8.

Current method. Let the motor run without load, first measure the three-phase current of the car, measure and compare when the two phases are exchanged, if it will not change with the power supply, it means that the one-phase winding with the current is relatively large There is a short circuit.