Harmonic Production in Ferromagnetic Materials at Low Frequencies and Low Flux Densities

摘要: When a multi-channel communication circuit includes non-linear element such as ferromagnetic core coil, distortion of the wave form impressed upon is produced. In terms single frequency components, this manifested in appearance new components. This may give rise to reduction quality any channel, and it also introduce crosstalk interference, which consists frequencies not present channel under consideration, produced by independent channels. view recent increased use systems, has become necessary investigate effects type distortion, determine dependence properties magnetic materials constituting cores inductance coils transformers, well impedances, those constants are significant distorting process. The behavior complex waves magnetizing force ordinarily highly involved process, so that direct correlation between some easily measured matter difficulty. It been established experimentally, confirmation theoretical speculations, third harmonic e.m.f. generated sinusoidal serve an index with force. relation valid for low flux densities at screening effect eddy currents important. paper therefore devoted investigation production its hysteresis loops. These loop turn shown be deducible from AC bridge measurements on coil known dimensions having material investigation. few included text. An analogy exists treatments three-element vacuum tube characteristics enables us compare simplifying relations introduced Rayleigh H. J. van der Bijl two cases. deductions found general agreement experiment, applied number cases practical interest. include air gaps dilution, choice transformers. Finally, amount current flowing out long lines deduced both lumped continuous loading.