A Novel Current Injection Circuit For Adjustable Speed Drives 
A.Kannan1, T.Chandrasekar2, B. Justus Rabi3, S.S. Darly4
1A.Kannan, Associate Professor, Department of Electrical and Electronics Engineering, Dr.M.G.R Educational and Research Institute, Chennai (Tamil Nadu) India.
2T.Chandrasekar, Professor, Department of Electrical and Electronics Engineering, Anna University, Sri Andal Alagar Engineering College, Chennai (Tamil Nadu) India.
3B.Justus Rabi, Professor Department of Electrical and Electronics Engineering, Anna University, Sri Andal Alagar Engineering College, Chennai (Tamil Nadu) India.
4S.S.Darly, Assistant Professor, Department of Electrical and Electronics Engineering, University College of Engineering, Tindivanam, (Tamil Nadu) India.
Manuscript received on November 10, 2019. | Revised Manuscript received on November 17, 2019. | Manuscript published on 30 November, 2019. | PP: 3933-3935 | Volume-8 Issue-4, November 2019. | Retrieval Number: F2608037619/2019©BEIESP | DOI: 10.35940/ijrte.F2608.118419
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: An adjustable speed drive creates the harmonics. The novel current injection circuit does not need any additional active devices. With the significant reduction in current harmonics, the AC input line current is sinusoidal. The ZVS technique is used for all the switches operation. The rectifier diodes are by soft switching. The output voltage regulated by fixed duty ratio with varying switching frequency. The advantages of proposed AC-DC-AC systems are low price, compact, high efficiency, and simplicity. Nine level diode clamped inverter produces the voltage harmonics of 8.75%. The Total Harmonic Distortion (THD) of input current is as low as 7.72 % and power factor as high as 0.99. Theoretical results are verified initially through PSIM simulation and validated with an experimental prototype of 2.5Kw.
Keywords: ASD, Three Phase Rectifiers, THD, Current Injection Technique, High Power Factor.
Scope of the Article: Deep Learning.