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IJSTR >> Volume 9 - Issue 3, March 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



A Novel Active Current Injection Circuit For Adjustable Speed Drives

[Full Text]

 

AUTHOR(S)

Chandrasekar. T, Kannan A ,K.E. Lakshmiprabha,

 

KEYWORDS

ASD, Three phase rectifiers, THD, Current Injection Technique, high power factor

 

ABSTRACT

This paper introduces a novel active current injection circuit to mitigate harmonics and to amend the power factor of a three phase front-end uncontrolled rectifier. The high PF is achieved by injecting HF current, from the HF inverter, at the input of the front- end three-phase rectifier the inverter switches are in zero voltage switching. The front- end rectifier diodes are working in zero current transition. It results a current waveform is continuous and sinusoidal in shape and current harmonics reduced significantly . The fixed duty ratio with varying switching frequency, regulates the output voltage. The input current THD and power factor are 5.76 % and 0.99 respectively. The results are verified through PSIM simulation and compared with an experimental prototype of 2.5Kw.

 

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