High-frequency transformers make life smaller
A
REO product story
Edited by the Engineeringtalk editorial team
Mar 1, 2001
REO has introduced a range of high frequency transformers that operate between 20 and 50kHz which are compact, light and hence more economical to produce than previous transformers
The transformer is one of the largest and heaviest components in a conventional circuit operating at mains frequency.
However, it is well known that the size of a transformer can be greatly reduced by increasing circuit frequency.
Therefore, if an application allows, it makes sense to use a transformer at high frequency and it is for this reason that REO has introduced a range of high frequency transformers that operate between 20 and 50kHz.
Today, many power supplies operate on the switch-mode principle.
This means that the mains is rectified and the resulting steady DC is rapidly switched on and off; 10 to 100kHz being the typical switching frequency range.
Regulating power through this method can be used to great advantage by stepping down the voltage after, rather than before, rectification.
This then allows the use of the new REO high-frequency transformers which are compact, light and hence more economical to produce than previous transformers.
With a footprint of only 88mm diameter, the transformers take up less space on the PCB and give the further benefit of reduced heat losses.
Various secondary voltages are available as standard and secondary current ratings of up to 100A are possible.
All transformers in the new range extend up to 2880 Watts power rating but this has been further extended in some models, up to 3456 Watts, by incorporating the transformers into a custom built heat sink.
The transformers provide excellent coupling, with low stray fields, are simple to install and made with a rugged construction by encapsulation, which results in a high durability against environmental influences.
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