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THE COMMUTATING AXES METHOD FOR THE ANALYSIS OF THREE-PHASE BRIDGE CONVERTERS
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| Author(s) |
A. P. Morando; G. Superti-Furga |
| Abstract |
The goal of this paper is to provide a mathematical model of a three-phase bridge-type DC/AC and AC/DC convertes for steady-state and transient conditions. Only analytical expressions of power circuits are to be taken into account, no interest is revealed either at numerical solution methods or control strategies. Simulation models of three-phase power converters can be build as an extension of single phase switching models. More efficient methods take advantage of three-phase symmetry. At this regard the Park transformation is a powerful tool, that furthermore allows the direct connection with the Park models of the rotating machines. In the present paper an approach that further exploits symmetry of bridge converters is proposed. It is based on a suitable discrete-time rotation of Park frame reference as so to follow synchronously the cyclically converter commutation. This way, the different topological connections appear on Park variables as a single repetitive one, obtaining a meaningful model suitable both for numerical simulation of dynamics and closed-form solution of steady-state. This method has been used for analysing a voltage inverter drive and for establishing the basis for first-harmonic simplified models. |
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| Filename: | Unnamed file |
| Filesize: | 2.818 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-07-26 by System |
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