Is part of the transformer winding circuit is usually insulated copper or aluminum wire wound made, and more are called high voltage winding turns, small turns are known as low-voltage winding. Mutual arrangement between different locations by high-voltage winding and the low voltage winding can be divided into concentric and overlapping of two.
????1. It is the concentric winding primary and secondary windings are wound into a cylindrical coil diameter different packages with each other, separated by an insulating paper tube between the core column, high and low voltage windings. In order to facilitate the winding insulation and high pressure pumping lead head, usually the high-voltage winding on the outside. Simple concentric winding structure, easy around the system, it is widely adopted. According to the winding method is different, can be divided into concentric cylindrical winding, spiral, continuous and kink type and other types.
????2. It is the overlap winding the primary and secondary windings of a certain suit in alternating order core column. Such high winding, a gap between the more low-voltage winding. So insulation is more complex, larger dressing workload. The advantage is high mechanical properties, layout and welding lead more convenient, leakage reactance is small, so often used in low voltage, high current transformers (such as electric transformers, welding transformers, etc.).