Modified Modulation Techniques for Cascaded Multilevel Inverter Fed Induction Motor Drive

1
Ch. Lokeshwar Reddy
Ch. Lokeshwar Reddy
2
P. Satish Kumar
P. Satish Kumar
3
M. Sushama
M. Sushama
1 CVR College of Engineering

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This paper presents modified Space Vector Pulse Width Modulation (SVPWM) techniques for Cascaded Multilevel Inverter. In the proposed SVPWM technique the reference signals are generated by adding offset voltage to the reference phase voltages. This SVPWM technique does not involve region identification, sector identification or look up tables for switching vector determination as are required in the conventional multilevel SVPWM technique It is also reduces the computation time compared to the conventional space vector PWM technique. The modulation signals are generated by comparing the reference phase voltages with triangular carrier signals. Cascaded multilevel inverter fed with Induction Motor and RL load is simulated for various carrier PWM techniques like PDPWM, PODPWM, APODPWM and PSCPWM. The simulation results are analysed and compared. Among the various modulation techniques, PDPWM is themost efficient one and has better spectral performance and better induction motor performance.

13 Cites in Articles

References

  1. J Holtz (1992). Pulsewidth modulation-a survey.
  2. Wang Zhou (2002). Relationship between space-vector modulation and three-phase carrierbased PWM: A comprehensive analysis.
  3. H Van Der Broeck,H-C Skudelny,G Stanke (1988). Analysis and realization of a pulsewidth modulator based on voltage space vectors.
  4. J Boys,P Handley (1990). Harmonic analysis of space vector modulated PWM waveforms.
  5. D Holmes (1992). The general relationship between regular sampled pulse width modulation and space vector modulation for hard switched converters.
  6. Lokeshwar Ch,P Reddy,M Kumar,Sushama (2014). Cascaded H-bridge Multi Level Inverter using new phase shifted carrier pulse width modulation technique.
  7. R Naderi,A Rahmati (2008). Phase shifted carrier PWM technique for general cascaded inverters.
  8. N Celanovic,D Boroyevich (1999). A fast space vector modulation algorithm for multilevel three-phase converters.
  9. D Lee,Lee (1998). A novel over modulation technique for space vector PWM inverters.
  10. Dae-Woong Chung,Joohn-Shoek Kim,Seung-Ki Sul (1998). Unified Voltage Modulation Technique for Real-Time Three-Phase Power Conversion.
  11. Arbind Kumar (2004). Direct torque control of induction motor using imaginary switching times with 0-1-2-7 and 0-1-2 switching sequences: a comparative study.
  12. T,Brahmananda Reddy (2006). Space vector based bus-clamping PWM strategies for direct torque controlled induction motor drive without sector and angle estimation using imaginary switching times: A comparative study.
  13. T,Brahmananda Reddy (2006). New Space vector based hybrid PWM technique for AC drives without angle estimation to reduce current ripple.

Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

Ch. Lokeshwar Reddy. 2016. \u201cModified Modulation Techniques for Cascaded Multilevel Inverter Fed Induction Motor Drive\u201d. Global Journal of Research in Engineering - F: Electrical & Electronic GJRE-F Volume 15 (GJRE Volume 15 Issue F9): .

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

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GJRE-F Classification: FOR Code: 290903p
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v1.2

Issue date

January 15, 2016

Language

English

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This paper presents modified Space Vector Pulse Width Modulation (SVPWM) techniques for Cascaded Multilevel Inverter. In the proposed SVPWM technique the reference signals are generated by adding offset voltage to the reference phase voltages. This SVPWM technique does not involve region identification, sector identification or look up tables for switching vector determination as are required in the conventional multilevel SVPWM technique It is also reduces the computation time compared to the conventional space vector PWM technique. The modulation signals are generated by comparing the reference phase voltages with triangular carrier signals. Cascaded multilevel inverter fed with Induction Motor and RL load is simulated for various carrier PWM techniques like PDPWM, PODPWM, APODPWM and PSCPWM. The simulation results are analysed and compared. Among the various modulation techniques, PDPWM is themost efficient one and has better spectral performance and better induction motor performance.

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Modified Modulation Techniques for Cascaded Multilevel Inverter Fed Induction Motor Drive

Ch. Lokeshwar Reddy
Ch. Lokeshwar Reddy CVR College of Engineering
P. Satish Kumar
P. Satish Kumar
M. Sushama
M. Sushama

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