Edgewise coils

Edgewise winding is one of the modern trends in coil manufacturing. The principle of this winding technology is that the rectangular section wire is wound not on the flat part of the wire but on the short side of the wire. That’s where the terms edgewise winding or side-winding stands for. The performance of electric coils depends on various factors, including the type of wire used for winding. Traditionally, round wire has been the preferred choice for coil winding. However, the emergence of edgewise coils wound with flat wire has introduced new possibilities and considerations in coil design and manufacturing. Depending on the application, flat wire offers some distinct advantages over round wire. As the name suggests, flat wire has a rectangular cross-section, which allows for a higher packing or filling factor compared to round wire. This means that more turns can be accommodated within the same physical space, resulting in increased power density and improved efficiency of the coil. That's true especially for coils designed with one layer.