Abstract
The main component of DC power supply systems are various semiconductor mostly controlled rectifiers with corresponding filter capacitors. In particular, these are multi-level rectifiers (MLRs) with a purposeful discrete-time change in the voltage transfer coefficient through a corresponding change in the operating state of its executive structure. Synthesized optimal variants of these structures are characterized by the high efficiency of the use of semiconductor switches elements. The work revealed and analyzed the peculiarities of the implementation of transitions between the specified operating states in two types of MLR – with a wide (full) and with a limited range of output voltage regulation. Taking into account these features made it possible to determine appropriate algorithms for discrete-time control of semiconductor switches elements of the MLR, which ensure an acceptable course of these transitions, during which the possibility of noticeable unwanted surges or drops in the voltage supplied to the consumer is practically excluded. The multivariate implementation of the algorithms for transitions between the output voltage levels of the MLR is another aspect of the multivariate transformer-and-switches executive structures of converters in general. References 10, tables 1, figures 5.
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