Aluminum exhibits very weak paramagnatism 2.2 x10^-5 "Materials that are called 'paramagnets' are most often those that exhibit, at least over an appreciable temperature range, magnetic susceptibilities that adhere to the Curie or Curie–Weiss laws. In principle any system that contains atoms, ions, or molecules with unpaired spins can be called a paramagnet, but the interactions between them need to be carefully considered." Copper is also weakly paramagnetic, but when used in the BPC configuration, it is just the secondary of a transformer. With the BPC open, there will be little to no heating in the wire. If the transformer coupling were perfect, and the secondary "shorted" the "L" part of the LC resonator would disappear leaving only the "C". Then the coil would heat from ohmic losses in the shorted copper secondary. In the real world, perfect coupling is not possible. This case would probably be too extreme, the cooker would sense the high current peaks and not allow operation. That's why earlier I suggested using a non-inductive resistor (carbon slug) matched to the BPC impedance and immersed in water as a load. Attached is a paper on Resonant Mode Convertor Topologies
---------------------------
"Secrecy, secret societies and secret groups have always been repugnant to a free and open society"......John F Kennedy
|