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You Are Here : Home -> Products -> Toroidal Transformers -> Custom Designed -> Temperature Rise
Toroidal Transformers generate heat due to the losses within the energy conversion processes. A typical graph of temperature rise versus power consumption would be as shown below. (Pout=Actual Power Output, Pnom=Nominal Power Rating)
These losses may be split into two main components :
Core LossesThe toroidal core is strip-wound using the highest grades of 'Grain Oriented Silicon Steel' (G.O.S.S.) The high grade of steel exhibits very low losses, typically 1 Watt per Kilogram of steel.
Typical figures for core losses would be as follows :
Copper LossesThe main source of losses in a toroidal transformer are Copper losses, and they arise from the resistance of the copper wire used in the windings. The losses (P) can be calculated from the equation P=I*I*R
(commonly know as 'I squared R loss') where I is the current flowing in the winding, and R is the DC resistance of the winding.
Typical copper losses are as follows:
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