On the overvoltage alarm of the winding machine spindle frequency converter

The main shaft frequency converter of the automatic winding machine generates an oL overvoltage alarm on the operation panel every time it stops. A multimeter is used to measure the input side power voltage and it is found to be normal. Therefore, the problem is locked in the deceleration time set by the frequency converter. In order to minimize the inertia of the spindle during parking, the deceleration time of the frequency converter was set to be very small, resulting in a rapid decrease in the frequency of the frequency converter after the parking signal was issued. At the same time, the synchronous speed of the motor also decreased rapidly. Due to the large inertia of the winding motor, the actual speed of the winding motor exceeded the synchronous speed at this time. The winding motor operates in the generator state, and a large voltage is induced on the stator side of the motor, Causes an overvoltage alarm to occur on the frequency converter

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After practical debugging, this system has set the deceleration time to 0.5S, which can greatly reduce the inertia of the automatic winding machine during deceleration and ensure that there is no overvoltage alarm. The adjustment of tension during winding the flat wire is achieved by adjusting the air pressure of the disc brake pad. We should also summarize the corresponding air pressure for different line widths.

The tension of the circular wire during winding is adjusted by the number of coils wound on the unwinding roller. When winding a relatively thin circular wire, if the tension value is not adjusted properly, the thin wire will be stretched and thin, and the edge paint will fall off. Therefore, the manufacturer of the automatic winding machine should summarize the appropriate number of coils for different circular wire diameters.

If during debugging, it is found that the wire arrangement mechanism of the automatic winding machine exhibits a noticeable phenomenon of running and stopping, and the running time is very short and the stopping time is very long within each running and stopping cycle, resulting in inconsistent wire arrangement tightness. It can be considered to reduce the sampling period to twice the PLC scanning period and continue debugging. It was found that the cable arrangement mechanism can move smoothly without a stop and go phenomenon, and the cable arrangement is also more compact.

If during debugging, it is found that the wire arrangement mechanism of the automatic winding machine exhibits a noticeable phenomenon of running and stopping, and the running time is very short and the stopping time is very long within each running and stopping cycle, resulting in inconsistent wire arrangement tightness. It can be considered to reduce the sampling period to twice the PLC scanning period and continue debugging. It was found that the cable arrangement mechanism can move smoothly without a stop and go phenomenon, and the cable arrangement is also more compact.

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