Title :
Effects of firing angle imbalance on 12-pulse rectifiers with interphase transformers
Author :
Perreault, David J. ; Kassakian, John G.
Author_Institution :
Lab. for Electromagn. & Electron. Syst., MIT, Cambridge, MA, USA
Abstract :
Firing angle imbalance between six-pulse groups of a 12-pulse rectifier leads to current imbalance, due to the finite magnetizing inductance of the interphase transformer. The amount of current imbalance is limited by the load regulation of the six-pulse groups. This paper presents a quantitative analysis of this effect and others, based on appropriate models of the system. Equations are developed which predict steady-state current shifts and transient behavior using an averaged model. A piecewise-linear model of the system is used to verify and extend the results via computer simulation. Results are normalized, making them useful for design purposes
Keywords :
AC-DC power convertors; circuit analysis computing; digital simulation; piecewise-linear techniques; power engineering computing; power transformers; rectifiers; rectifying circuits; thyristor convertors; AC/DC power convertor; averaged model; computer simulation; design; finite magnetizing inductance; firing angle imbalance; interphase transformers; load regulation; piecewise-linear model; quantitative analysis; six-pulse groups; steady-state current shifts; transient behavior; twelve pulse rectifiers; Analytical models; Bridge circuits; Inductance; Magnetic analysis; Negative feedback; Predictive models; Rectifiers; Student members; Transformers; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1993. PESC '93 Record., 24th Annual IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-1243-0
DOI :
10.1109/PESC.1993.472052
