Vladimir
New member
Richard Allen said:What a load of rubbish!!. True, toroids are more efficient but to say that they 'chuck out' more current than a laminate for a given Va rating is just plain wrong. A 500Va transformer is what it is whether laminate or toroid. Laws of physics n all that. :wall:
Ugh! Thats not what I meant, it came out stupid like that. :wall:
- Electrical Efficiency
There are two important reasons why a toroidal transformer is more efficient than the stacked E/I lamination type. One is that the high quality grain oriented steel is utilized at close to 100% in all areas of the core. As a result, the core may operate at 15-16 kilogauss versus 12 to 14 kilogauss in the E/I design. There are no air gaps in the core, which means a no-load current draw of about 10% of that of a stacked lamination construction. The other reason is that the windings are distributed over the entire core circumference which reduces the mean length of copper wire per turn in comparison with the E/I transformer, the windings on which are located only on parts of its steel core. Accordingly, a toroidal design requires less steel and copper wire with less core and copper losses resulting in energy savings.
- Voltage Regulation
The voltage drop under load (regulation) is much lower than that of a conventional transformer. Increasing the core size can further reduce voltage drop.
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