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VIENNA Rectifier III - A Novel Three-Phase Single-Stage Buck-Derived Unity Power Factor AC-to-DC Converter System
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| Author(s) |
Johann W. Kolar; Uwe Drofenik; Hans Ertl; Franz C. Zach |
| Abstract |
In the area of ACDC converters with low effects
on the mains single-stage rectifier systems gain more
and more importance. The basic characteristic of these systems
is the direct integration of a high-frequency isolation of
the output circuit into the converter topology. This makes
possible the matching of the output and mains voltage levels
besides the sinusoidal guidance of the mains currents and a
highly dynamic control of the output voltage. Also, higher
efficiency and a lower realization effort as compared to
a two-stage, i.e., ACDC-DCDC engergy conversion results.
In this paper the topology of a novel single-stage three-phase
PWM rectifier system with impressed output current is developed
starting from a two-stage converter concept. After
the description of the basic function of the circuit (called
VIENNA Rectifier 111) the conduction states and the current
space vectors available for forming the input currents are
determined; a simple multi-loop control of the converter is
proposed which also guarantees a symmetric transformer
magnetization based on pre-control signals. Furthermore,
the theoretical considerations are verified by digital simulation
and the current stresses on the power semiconductor
devices are calculated in analytically closed form. Finally, a
short preview on the planned continuation of the research is
given. |
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| Filesize: | 575.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-20 by System |
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