Abstract
This paper presents a novel design of step-up DC-DC converters whose merits are: (i) The continuity of the input current has been kept; (ii) The polarity of the output voltage has been kept positive which provides the same ground of the input source and load; (iii) The low voltage gain of the quadratic converters has been solved that it can increase the input voltage to 10 times more by the low value of the duty cycle; (iv) Apart from the high value of the voltage gain, the semiconductors’ voltage and current stresses were lower than the output voltage and input current of the converter which are the highest value of the voltage and current respectively and semiconductor based components do not suffer from high value of the current/voltage stresses; (v) Additionally, the voltage/current stresses are low, and the efficiency is good according to its 90 percent value. The analysis of the non-ideal voltage gain has been done and its better function has been deduced by comparing it with the recently proposed non-isolated topologies. Additionally, the non-isolated voltage gain has been studied for different output power levels. The efficiency has been extracted and discussed for varying duty cycles and output power based on ignoring some losses. Experimental results and simulation outcomes from the PLECS software have been compared along with theoretical relationships. The prototype of the topology has been tested at 100 W output power, 100 V output voltage, and 10 V input voltage.
Highlights
The classic DC-DC converters, such as buck, buck-boost, and boost converters, have a simple structure and a high efficiency as a result
This topology only has one switch and does not suffer from the current stress on the input filter capacitor because it has a continuous input current. This topology has a voltage gain of 10 by a 67 percent duty cycle. This topology cannot be fixed to 10 times greater than input voltage by a 67 percent duty cycle using a nonideal model
In the ideal mode of the suggested topologies, a duty cycle of 76 percent can result in a voltage gain of 10
Summary
The classic DC-DC converters, such as buck, buck-boost, and boost converters, have a simple structure and a high efficiency as a result. This topology cannot be fixed to 10 times greater than input voltage by a 67 percent duty cycle using a nonideal model Another transformer less DC-DC converter is the super lift Luo converter. In the ideal mode of the suggested topologies, a duty cycle of 76 percent can result in a voltage gain of 10. A 73 percent duty cycle can cause a voltage gain of 10 in the ideal mode In such a case, the current and voltage stresses on semiconductor devices reduce their efficiency. The topology of the converter causes lower voltage/current stress on the semiconductors than high voltage gain, and their per-unit value is less than 50 percent. Are the voltages and currents set by the inductors and capacitors during the functioning of the converter in the continuous current mode: L1
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