A Transformer-less High-Gain Boost Converter With Input Current Ripple Cancellation at a Select able Duty Cycle (IEEE -2013)

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By Jackson Taylor

This letter proposes a boost dc–dc converter topology with the novel capability of canceling the input current ripple at an arbitrarily preselected duty cycle. This is accomplished without increasing the count of the number of components in contrast to other solutions available in the literature. In addition, the converter features a high voltage gain without utilizing extreme values of duty cycle or boosting transformers. These features make the converter ideal to process electric power coming From low-voltage power-generating sources, such as renewables. This paper provides details on the principle of operation via topological considerations and a mathematical model. The key factor of reactive component sizing is also discussed in detail. The converter was validated in the laboratory through the construction of a hardware prototype.

The main aim of this project is to study the current status of DC-DC converter in small power generating sources. Generally a boost converter is required to boost the low level renewable voltage and link this voltage to an inverter. This work studies a transformer less boost converter and completes the following objectives:

  • To develop a Transformer less high step up dc-dc converter that can achieve input current ripple cancellation without Operating at extreme duty cycle. 
  • As  transformers  are  bulky,  heavy  weighted  and  expensive  so  this  project  target  is  to implement a converter circuit without transformer which will help to provide high step up voltage. 
  • To develop a boost converter with reduced number of power electronic switches than the conventional converters so that the switching losses, electromagnetic interference due to switching, harmonic distortion etc. are reduced.