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Indian Institute of Technology (IIT) Roorkee 
NPA: A multilevel high power factor AC-DC converter 
Pramod Agrawal, Naveen Yalla, Narendra Babu Avalamandu 
Indian Institute of Technology (IIT) Roorkee 
Application type:
Applied - 2019-04-10 
Application Number:
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Indian Institute of Technology (IIT) Roorkee 
The main objective of this invention is to achieving important performance parameters of frontend converter (a) Active input current shaping with minimum total harmonic distortion, (b) Nearly unity power factor, (c) Well regulated DC link voltage with less cost, more efficient power electronic converter. The novel multilevel converter topology is given for achieving above performance parameters for AC-DC power conversion applications. The topology can be modelled as classical multi point structured configuration with omission of clamping devices and reduced switch stress. Each phase of proposed topology has four controlled switches and four diodes for five level structure. This structure can be extended to n-levels and valid for multi-phase system. 

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