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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Using larger power transformers in low power-draw source components posted by andyr on June 21, 2004 at 02:34:54:
Magnetic flux in the core is determined by the input voltage, frequency, # turns and core areaTransformer manufacturers have no incentive to ship a gram more iron or copper than just meets minimum specs – so all standard off-the-shelf transformers will be designed for the (nearly same) Bmax core excitation that just meets power dissipation limits regardless of power or current rating
To truly “improve†the transformer by reducing core excitation you need a custom wound transformer – or a tweakers option is to use a 240 Vac pri with 120 Vac for a 2X reduction in core Bmax (and output voltage
given the highly nonlinear core B-H region used by transformer manufacturers, a 2X reduction in Bmax will move the core material mu_r at the operating point much higher, increasing K and Lm while reducing circulating current; whether any of that translates to improved sound is another question
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Follow Ups
- Faraday's law sez you're increasing the wrong rating - jcox 19:16:41 06/21/04 (2)
- just ask for a reduced Bmax core/winding combination - jcox 07:58:14 06/22/04 (0)
- Thanks, jcox, for your input ... - andyr 19:44:07 06/21/04 (0)
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