Power-frequency relations in nonlinear two-poles

In the first part of the paper, some properties of the coefficients of the Fourier-series function f[v(t)] are presented, where f(v) is an arbitrary continuous function and v(t) is an almost-periodic function. In the second part of the paper, the power-frequency relations for nonlinear two-poles are obtained on the basis of these properties. These power-equilibrium equations are the generalizations of Groszkowski´s and Manley-Rowe´s equations. The presented, generalized form of these equations comprise as well the elements having loop-like characteristics, nonlinear inductance, capacitance with losses, and others.