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Improved overmodulation technique for enhancing torque capability of inverter-driven AC motors

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Abstract

The overmodulation operation of a three-phase inverter can enhance the output torque capacity of the AC motors. In this case, the enhancement varies depending on the overmodulation schemes applied for the overmodulation operation. Steady-state overmodulation schemes are usually employed to give the unit voltage gain up to the six-step mode of an inverter. However, these schemes lead to a slow transient response of the output torque and require a complex algorithm for implementation. On the other hand, dynamic overmodulation schemes can achieve a rapid transient response of the output torque and are simple to implement. However, inverters using these schemes cannot work up to the six-step mode since the voltage gain of the inverter is less than one in the overmodulation region. In this paper, a technique is proposed that can increase the DC voltage utilization of an inverter by improving the voltage gain in dynamic overmodulation operation. An inverter with dynamic overmodulation using the proposed technique can work up to a six-step mode. Hence, AC motors can obtain enhanced torque capacity during flux-weakening operation. Consequently, an improved transient torque response can be achieved in the high-speed region. From simulation and experimental results, it was validated that the proposed technique can be used for dynamic overmodulation operation for not only the continuous PWM but also the DPWMs (discontinuous pulse width modulations).

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References

  1. Kwon, T.S., Sul, S.K.: Novel antiwindup of a current regulator of a surface-mounted permanent-magnet motor for flux-weakening control. IEEE Trans. Ind. Appl. 42(5), 1293–1300 (2006)

    Article  Google Scholar 

  2. Kwon, T.S., Choi, G.Y., Kwak, M.S., Sul, S.K.: Novel flux-weakening control of an IPMSM for quasi-six-step operation. IEEE Trans. Ind. Appl. 44(6), 1722–1731 (2008)

    Article  Google Scholar 

  3. Sahoo, S.K., Bhattacharya, T.: Field weakening strategy for a vector-controlled induction motor drive near the six-step mode of operation. IEEE Trans. Power Elec. 31(4), 3043–3051 (2016)

    Article  Google Scholar 

  4. Gallert, B., Choi, G.S., Lee, K.B., Jing, X., Son, T.C.: Maximum efficiency control strategy of PM traction machine drives in GM hybrid and electric vechicles. In: IEEE Energy Convers Congress Exposition, pp. 566–571. IEEE, Cincinnati (2017)

  5. Kwon, Y.C., Kim, S.M., Sul, S.K.: Six-step operation of PMSM with instantaneous current control. IEEE Trans Ind Appl 50(4), 2614–2625 (2014)

    Article  Google Scholar 

  6. Lee, H.K., Hong, S.M., Choi, J.W., Nam, K.H., Kim, J.H.: Sector-based analytic overmodulation scheme. IEEE Trans Ind Electron 66(10), 7624–7632 (2019)

    Article  Google Scholar 

  7. Holtz, J., Lotzkat, W., Khamnadkoner, A.M.: On continuous control of PWM inverter in the overmodulation range including the six-step mode. IEEE Trans Power Electron 8(4), 546–553 (1993)

    Article  Google Scholar 

  8. Lee, D.C., Lee, G.M.: A novel overmodulation technique for space-vector PWM inverter. IEEE Trans Power Electron 13(6), 1144–1151 (1998)

    Article  Google Scholar 

  9. Park, Y.S., Sul, S.K., Hong, K.N.: Linear overmodulation strategy for current control in photovoltaic inverter. IEEE Trans Ind Appl 52(1), 322–331 (2016)

    Article  Google Scholar 

  10. Sahoo, S.K., Bhattacharya, T.: Rotor flux-oriented control of induction motor with synchronized sinusoidal PWM for traction application. IEEE Trans Power Electron 31(6), 4429–4439 (2016)

    Article  Google Scholar 

  11. S. H. Kim: Electric Motor Control, DC, AC, and BLDC Motors. Chap. 7. Elsevier Inc. (2017)

  12. Rossetto, L., Tenti, P., Zuccato, A.: Integrated optimum control of quasi-direct converters. IEEE Trans Power Electron 12(6), 993–999 (1997)

    Article  Google Scholar 

  13. Seok, J.K., Kim, J.S., Sul, S.K.: Overmodulation strategy for high-performance torque control. IEEE Trans. Power Electron 13(4), 786–792 (1998)

    Article  Google Scholar 

  14. Bae, B.H., Sul, S.K.: A novel dynamic overmodulation strategy for fast torque control of high-saliency-ratio AC motor. IEEE Trans Ind Appl 41(4), 1013–1019 (2005)

    Article  Google Scholar 

  15. Gemassmer, T., Richter, J., Schnarrenberger, M., Braun, M.: Dynamic overmodulation for highly dynamic current control of IPMSM with saturation characteristics. In: 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, pp. 842–847. IEEE, Ischia (2014)

  16. Lerdudomsak, S., Kadota, M., Doki, S., Okuma, S.: Novel technique for fast torque response of IPMSM based on space-vector control method in voltage saturation region. In: IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society, pp. 1015–1020. IEEE, Taipei (2007)

  17. Bolognani, S., Zigliotto, M.: Novel digital continuous control of SVM inverters in the overmodulation range. IEEE Trans Ind Appl 33(2), 525–530 (1997)

    Article  Google Scholar 

  18. Yun, J.H., Yoo, J.W., Jung, H.S., Sul, S.K.: Simple overmodulation scheme for improved dynamic performance of IPMSM. In: 2020 IEEE Transportation Electrification Conference & Expo (ITEC) Proc IEEE ITEC, pp. 901–905, IEEE, Chicago (2020)

  19. Yun, J.W., Sul, S.K.: Dynamic overmodulation for improved current regulation of PMSM. In: 2020 IEEE Transportation Electrification Conference & Expo (ITEC), pp. 5368–5374. IEEE, Chicago (2020)

  20. Jeong, H.I., Kim, S.H.: Improved overmodulation technique of a three-phase inverter for enhanced output torque of AC motors. In: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, pp. 1120–1125. IEEE, Lisbon (2019)

  21. Chung, D.W., Kim, J.S., Sul, S.K.: Unified voltage modulation technique for real-time three-phase power conversion. IEEE Trans Ind Appl 34(2), 374–380 (1998)

    Article  Google Scholar 

  22. Hava, A.M., Sul, S.K., Kerkman, R.J., Lipo, T.A.: Dynamic overmodulation characteristics of triangle intersection PWM methods. IEEE Trans Ind Appl 35(4), 896–907 (1999)

    Article  Google Scholar 

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Authors and Affiliations

  1. Department of Electrical and Medical Convergent Engineering, Kangwon National University, Chuncheon, Korea

    Hye-In Jeong & Sang-Hoon Kim

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  1. Hye-In Jeong
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  2. Sang-Hoon Kim
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Correspondence to Sang-Hoon Kim.

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Jeong, HI., Kim, SH. Improved overmodulation technique for enhancing torque capability of inverter-driven AC motors. J. Power Electron. 21, 683–692 (2021). https://doi.org/10.1007/s43236-020-00216-2

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  • DOI: https://doi.org/10.1007/s43236-020-00216-2

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