Abstract
This paper proposes double interleaved boost converters with high voltage gain and with magnetically coupled inductors, while a third coupled winding is used for magnetic flux reset of the core during converter operation. The topology of the proposal is simple, it does not require many additional components compared to standard interleaved topologies, and it improves the transfer characteristics, as well as system efficiency even for high power levels. The investigation of steady-state operation was undertaken. It was discovered that the proposed converter can be designed for a target application where very high voltage gain is required, while adjustment of voltage gain value can be done through duty-cycle variation or by the turns-ratio modification between individual coils. The 1 kW prototype was designed to test the theoretical analysis. The results demonstrate that the proposed converter achieves very high voltage gain (1:8), while for the designed prototype the peak efficiency reaches >96% even when two additional diodes and one winding were implemented within the converter’s main circuit. The dependency of the output voltage stiffness on load change is minimal. Thus, the presented converter might be a proper solution for applications where tight constant DC-bus voltage is required (a DC-DC converter for inverters).
Highlights
Current trends in automotive applications are characterized by a common rule—green energy, or blue energy
The topology the magnetically coupled inductors, while a third coupled winding is used for magnetic flux reset of proposal is simple, it does not require many additional components compared to standard the core during the converter operation as well for the voltage gain as adjustment
The operation of the dual interleaved boost converter with magnetically coupled inductors and with demagnetizing circuits can be divided into four operational intervals
Summary
Current trends in automotive applications are characterized by a common rule—green energy, or blue energy. The topology the magnetically coupled inductors, while a third coupled winding is used for magnetic flux reset of proposal is simple, it does not require many additional components compared to standard the core during the converter operation as well for the voltage gain as adjustment. Theefficiency topology interleaved topologies [31–35] and it improves the as transfer characteristics, well as system of the proposal is simple, it does not require many additional components compared to standard even for high power levels [36]. With its superior behavior related to the output voltage stiffness in interleaved topologies [31–35]itand it improves the transfer as where well asconstant system efficiency dependency on load change, might be a proper solutioncharacteristics, for applications. DC-bus steady state analysis, voltage transfer characteristic derivation, magnetic component stress reduction voltage is required converter for inverters).
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