Mathematical analysis of the multiplicity of thyristor rectifiers

Release time：2024-12-24

Viewing frequency：166

Abstract: The author of this article uses the switch function and the relationship matrix between the primary and secondary currents of the phase-shifting rectifier transformer to obtain the waveforms of the input current and output voltage of the multiplex rectifier based on the commutation law of the three-phase thyristor multiplex rectifier power device under ideal conditions. Fourier series decomposition was performed on the input current waveform and output voltage waveform to obtain the Fourier series expressions for the AC input current and DC side voltage. Subsequently, the mathematical analysis of the multiplex thyristor rectifier was completed, and the calculation formulas for the fundamental component, harmonic content, power factor, distortion factor of the input current, as well as the average value and harmonic content of the DC output voltage were provided. This provides a theoretical basis for the design and analysis of multiplex thyristor rectifiers.

Keywords: thyristor; Rectifier; Multiplicity; Harmonics; Power factor; distortion factor