![]() Low fill: For manufacturing ease and reduced capacitance, winding factor between single layer and 30% may be used.Disadvantages are reduced power handling and higher flux leakage. Advantages are lower winding capacitance, more repeatable parasitics, good cooling, and low cost. Single layer: The number of turns is limited by the inside circumference of the core divided by the wire diameter.In practice, several approaches to toroid winding are used: Toroid Core Winding factors can vary from 20-60%, a typical value in many applications being 35-40%. In other words, in a toroid, winding factor is given by: Winding factor, also called fill factor, is the ratio of total conductor cross section (usually copper cross section) to the area of the core window.
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