One rule of thumb is to restrict the torsionaldeflection to one degree in a length equal to 20 diameters.
人的拇指规则就是限制到一个程度的扭转变形的长度相等的20倍。
2
The torsionaldeflection of spiral winding for the large power transformer is mostly caused by the common effect of the axial current component and the radial leak magnetic field.