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What if there are fewer motor coils? What effect will the motor coil have less winding?

Posted on: 11/12/2021
Let me talk about this issue based on my usual experience when rewinding the motor windings. We know that when winding the motor spindle windings, the number of turns of the coil must be strictly implemented according to the motor parameters. For the motor, the number of turns of the coil A few more turns and a few fewer turns will have a certain impact on the motor, because the windings in the motor are similar to inductance. If the motor is wound a few times, its number of turns will increase, and the inductance will increase; Turns, the number of turns will decrease, and the inductance will also decrease, which will affect the motor more or less.

We know that the coil of the motor is a part of the stator Circuit of the motor. When the motor is energized, if the number of coils of the motor is less than the actual number, and the power of the motor is also relatively large, because the number of turns of the high-power motor is inherently small, the cross-sectional area of ​​the coil wire diameter According to Ohm’s law in the middle school physics textbook, we can know that the decrease in the number of turns of the motor coil is equivalent to the decrease in the resistance in the stator circuit of the motor, and the current will increase, which will cause the magnetic flux density of the motor to increase. Large and saturated, it will eventually cause serious heating of the motor and cause the motor to burn.

At the same time, in terms of the external speed, the number of coil turns will decrease, and the motor speed will increase. I studied electrical engineering when I was in school. At that time, when winding the motor coil in the laboratory, the coil and the iron core were caused by hand winding. The gap between them increases, which reduces the number of turns of the coil to a certain extent. After the production is completed, the motor is installed and the motor is energized. At this time, the speed of the motor is obviously faster than before. If it is wound according to the original number of turns of the motor, it is difficult to embed it in the motor stator. After all, the coils wound by the motor manufacturer are wound by machines, and the process parameters are guaranteed.

A few more turns of the motor will not only waste wires, but also increase the resistance and reactance of the motor windings, which will definitely affect the performance of the motor. After adding the number of turns, the resistance of the motor winding increases, and the current will decrease. Obviously, it will reduce the power of the motor. The second is to increase the winding. The motor speed will be slower in terms of external performance after power on, but the service life of the motor can be prolonged.

In short, for the size of the motor power, low-power motor wires have more fine turns. Generally, one phase winding has one or two thousand turns. When winding the wire, there is no problem with less than ten or eight turns, and it has little effect on the motor.

But for a motor with a large power, the winding is thick and small. Increasing or reducing the number of turns of the winding has a greater impact on the motor. Therefore, when the motor is actually embedded, the original wire diameter and original turns should be used according to actual needs. Count the number of embedded coils, not less or more, otherwise it is difficult to achieve the original performance.