How does the transformer coil affect the winding machine manufacturer's winding machine

With the rapid and steady development of China's economy, the demand for electricity is also increasing. Transformers, as the basic equipment for power transmission and transformation in the power industry, are widely used in power plants, converter stations, substations, and user terminals, occupying a very important position in the power industry. Their demand is also increasing day by day, and the market prospects are very broad. This puts forward higher requirements for the production efficiency of transformers in China. At the same time, with the global energy crisis, it is imperative to produce more energy-saving and efficient transformers. It is in this context that China's transformer manufacturing standards have been repeatedly raised, and the requirements for performance indicators have become increasingly strict.

There are two directions for the future development of transformers: one is ultra-high voltage, large capacity, and the other is efficient, intelligent, compact, and low noise. The quality and economic and technical performance of transformers are not only influenced by structural design, but also largely depend on the manufacturing process and technical level of manufacturing equipment. In order to meet the increasingly strict requirements for transformer quality and performance indicators, manufacturers of fully automatic winding machines must improve the technical level of transformer foil winding machines, so that they can produce transformers that can meet the needs of national power development.

The current vertical winding machines are further developing towards large-scale production. The original vertical winding machine from the manufacturer of fully automatic winding machines had a load capacity of only 20t, but now it has been increased to 40t. The larger coil diameter can be used up to 3500mm, and the larger height can reach 4000mm. The airbag plate type tensioning device is used, and the digital display of tension size makes tension control more accurate, stable and reliable. In order to improve the dimensional accuracy of the wound coil and control the radial runout of the vertical winding machine, a fixing device for the winding die shaft head has been added; In order to control axial runout, high-precision double row roller type large bearings were used. Therefore, by using specialized equipment for coil winding, the production of windings has reached a new level. This makes it possible for the transformer to further reduce losses, reduce partial discharge, reduce weight, and reduce costs.

From the perspective of transformer winding structure design, not all coils used can be produced using vertical winding machines. Such as layered structure and multi helix structure coils. If this type of coil is wound using a regular horizontal winding machine without any axial pressure, the gap between the line segments is large, like a compression spring. After being compressed, the diameter of the coil increases, creating a gap between the coil and the paper cylinder, which can cause axial instability of the coil. In case of axial electric force, the coil may be damaged. Therefore, horizontal winding machines with axial and radial compression are widely used in the production of large transformer coils. With the increasing requirements for transformer performance, the production of small and medium-sized transformers has gradually begun to use compression type horizontal winding machines.

In order to control the clamping force more accurately, manufacturers of fully automatic wire winding machines have replaced the torque motor or cylinder used in the clamping mechanism to generate pressure with a servo motor. In order to control the dimensional tolerance of the wound coil, a grating ruler is added to detect the coil size online. The tension of each wire reel on the multi axis pay-off car is independently controlled. According to the length of the winding coil, the pay-off car follows and tracks to avoid new stress caused by wire twisting and deformation, and to reduce eddy current loss of the winding.

Website:https://www.zhengtaifeng.com/