How to deal with the motor current imbalance of high-temperature AC axial flow fan

High-temperature AC axial flow fan motor is a kind of motor often used in axial flow fan. It plays a very important role in the operation of high-temperature AC axial flow fan, and can adapt to some harsh environments. But the high temperature AC axial flow fan motor will have unbalanced current. What is the reason?
The large and small enameled wires of my winding transformer were all provided by a friend of my neighbor's motor repair shop. I asked for the wire of any diameter. He would put down the work of winding to receive me. We learned a lot of his experience through regular exchanges and had some understanding of the requirements and working principles of the motor winding. As the title owner said, for the unbalanced current generated by the motor, if it is a new machine, due to the error of the number of turns in the winding and the wiring error, the enameled wire cannot be damaged during the winding and assembly, otherwise once the turn-to-turn short circuit occurs, the enameled wire will be hot or even burnt after starting, and the gap is not correct according to the wrong wire, which is a common problem of new machines. The master told me that the allowable error between the three-phase current standard of the new machine and the maximum to minimum average value should not exceed 3%!
If the current unbalance occurs in the normal use of the motor, we can first think of the unbalance between the three phases, or the open circuit in a certain phase, or the poor contact of a certain phase, which can cause the current unbalance, or aging. After the motor is often heated, it will cause the paint coating burn, which is easy to cause the inter-turn short circuit, and the rotor will produce oscillation and motor heating.
One phase of three-phase electricity is open circuit or one phase of contactor is not in good contact. (I once encountered a poor contactor that burned one phase of contact and made the deepwater pump hot and blistering in the well)
If the three-phase unbalance is found to be too large during use, the machine shall be shut down for measurement and maintenance.
Each coil of three-phase AC motor will generate N and S magnetic poles, and the number of magnetic poles contained in each phase of each motor is the number of poles. Since the magnetic poles appear in pairs, the motor can be divided into 2, 4, 6, 8 „ poles. In China, the power frequency is 50 Hz, the 2-pole synchronous speed is 3000 r/min, the 4-pole synchronous speed is 1500 r/min, the 6-pole synchronous speed is 1000 r/min, and the 8-pole synchronous speed is 750 r/min. One winding can form a circuit only when it comes and goes, that is, the number of magnetic poles, which appears in pairs. The poles mean the magnetic poles. When these windings pass through the current, they will generate magnetic fields, and there will be magnetic poles accordingly. The current of the motor is only related to the voltage and power of the motor.
To sum up, we can understand the reason why the current of the high-temperature AC axial fan motor is unbalanced. In fact, the current imbalance of the high-temperature AC axial flow fan motor is not a very rare problem, but the impact on the high-temperature AC axial flow fan motor is very large, and we must pay attention to it.