Industrial Electronics
Mohammad Reza Shaker Ardakani; Sara Hasanpour; Majid Moazzami; Fariborz Haghighatdar Fesharaki; Mahnaz Hashemi
Abstract
This paper presents a novel non-isolated DC-DC converter topology with several significant advantages. First, the input current remains continuous, thereby reducing the current stress on the input filter capacitor. Second, the converter utilizes the same number of inductors as conventional topologies ...
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This paper presents a novel non-isolated DC-DC converter topology with several significant advantages. First, the input current remains continuous, thereby reducing the current stress on the input filter capacitor. Second, the converter utilizes the same number of inductors as conventional topologies such as SEPIC, Zeta, and Ćuk converters. Third, it achieves high voltage gain at relatively low duty cycles. Fourth, the maximum voltage stress on the semiconductors remains well below the output voltage, ensuring improved device reliability. Fifth, the design incorporates only a single switch, simplifying the drive circuitry. Sixth, the voltage stress on the switch is significantly lower than the output voltage. Seventh, a quadruple voltage-lift is realized using an enhanced diode–capacitor voltage multiplier integrated at both stages of the converter. Finally, although the power circuit employs 15 diodes and 14 capacitors, the topology maintains a high voltage gain density, justifying the component count. Experimental results are provided to validate the theoretical analysis. The implemented prototype successfully boosts an input voltage of 20 V to an output of 1200 V at a 50% duty cycle, delivering an output power of less than 200 W.
Industrial Electronics
Hossein Gholizadeh; Sara Hasanpour
Abstract
In this paper, a new transformerless high step-up DC/DC converter with low input current ripple for renewable energy generation systems. This introduced circuit is based on a conventional quadratic boost converter with a CUK circuit. Therefore, the advantages of Cuk and quadratic boost converters such ...
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In this paper, a new transformerless high step-up DC/DC converter with low input current ripple for renewable energy generation systems. This introduced circuit is based on a conventional quadratic boost converter with a CUK circuit. Therefore, the advantages of Cuk and quadratic boost converters such as continuity of the input and output currents have been maintained. In this suggested topology, switched capacitor and switched inductor techniques are also considered to obtain high voltage gains. The series connection of an inductor with the load causes the converter to have no right half plane zeros (RHPZ) in the transfer function; Thus, the proposed structure is able to provide fast dynamic behavior under the load variation than the other typical counterparts. The other advanced features of the introduced topology are its ultra-high voltage gain, continuous input current with low ripple, low voltage stress, and common ground between the input source and output load. The voltage conversion ratio of the suggested topology for both ideal and non-ideal modes has been provided. The operating principle, steady-state analysis along with comparison study of the proposed converter are discussed in detail. Finally, to confirm the theoretical analysis, a 80 W (20 V/ 160 V) hardware prototype is established.
Industrial Electronics
Keyvan Yari; Sara Hasanpour
Abstract
This paper presents a new high step-up DC-DC switched-mode converter in which not only the input and output ports can be connected to a common ground, but also the service time of the input source is extended due to continuous current injection to the proposed power converter. Furthermore, the fast dynamic ...
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This paper presents a new high step-up DC-DC switched-mode converter in which not only the input and output ports can be connected to a common ground, but also the service time of the input source is extended due to continuous current injection to the proposed power converter. Furthermore, the fast dynamic response is offered by minimum phase characteristics. This key feature is achieved by making the proposed converter’s control to output transfer function, free from the right half plane zero (RHPZ). Full description of the operation principles, theoretical analysis related to steady-state operation, and also the small-signal modelling derivation of the proposed converter, are presented in this paper. In the end, to confirm all the merits of the proposed converter and accuracy of theoretical analysis, a sample 25 V - 100 V laboratory prototype DC-DC converter with 100W output power has been implemented, and the main experimental results have also been outlined.
