Abstract
The main harmonic components in nonlinear differential equations can be solved by using the harmonic balance principle. The nonlinear coupling relation among various harmonics can be found by balance theorem of frequency domain. The superhet receiver circuits which are described by nonlinear differential equation of comprising even degree terms include three main harmonic components: the difference frequency and two signal frequencies. Based on the nonlinear coupling relation, taking superhet circuit as an example, this paper demonstrates that the every one of three main harmonics in networks must individually observe conservation of complex power. The power of difference frequency is from variable-frequency device. And total dissipative power of each harmonic is equal to zero. These conclusions can also be verified by the traditional harmonic analysis. The oscillation solutions which consist of the mixture of three main harmonics possess very long oscillation period, the spectral distribution are very tight, similar to evolution from doubling period leading to chaos. It can be illustrated that the chaos is sufficient or infinite extension of the oscillation period. In fact, the oscillation solutions plotted by numerical simulation all are certainly a periodic function of discrete spectrum. When phase portrait plotted hasn’t finished one cycle, it is shown as aperiodic chaos.
Highlights
Two types of mixing circuits containing three main harmonic components are introduced in this paper
This paper propels the application of theorem from single first harmonic to containing three main harmonics [1]-[8]
The complex power balance theory opens up a new field for researching nonlinear oscillation
Summary
Two types of mixing circuits containing three main harmonic components are introduced in this paper. (2014) Power Balance of Multi-Harmonic Components in Nonlinear Network. Three main harmonics are solved by frequency domain balance theorem and circuit law, and the complex power of each frequency component is individually conserved. The power calculation in mixing circuit has important theoretical significance It indicates that the balance theorem of frequency domain is applicable to odd term equation, and even term equation. The circuit includes three main frequency components, the self-excited oscillation and two signal frequencies. The interaction relation of nonlinear couplings of three main harmonics, and the calculation formulae of the first and second types are completely different
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