Study of Hoist Control System Based on Dual Three-Level Inverter

Article Preview

Abstract:

The double-fed control strategy for AC hoist motor is discussed in this paper. The AC/DC/AC power converter is adopted as main circuit. Three-phase neutral-point-clamped three-level rectifier is used as AC/DC link to realize unity power factor at grid-side, which reduces harmonic distortions. For the DC/AC inverter, three-level topology is used, which is controlled by stator-flux oriented vector control method. Meanwhile, energy flows in bidirectional way by back to back three-level power converter. The hoist motor control system obtains a high dynamic performance when stator side operating in unity power factor condition. The reliability and safety of hoist system is improved based on double PLC. The control system mentioned in this paper is being used to control a shaft hoist with a capacity of 260kW, and the power saving is remarkable.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

368-371

Citation:

Online since:

July 2014

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] Sheng Wu, Study on control system of double-fed induction motors[D]. Huazhong University of Science and Technology. (2005).

Google Scholar

[2] Rojas C A, Rodriguez J, Villarroel F, et al. Predictive torque and flux control without weighting factors[J]. Industrial Electronics, IEEE Transactions , 2013, 60(2): 681-690.

DOI: 10.1109/tie.2012.2206344

Google Scholar

[3] A. Shukla, A. Ghosh, A. Joshi. Capacitor voltage balancing schemes in flying capacitor multilevel inverters[C]. Power Electronics Specialists Conference, 2007: 2367-2372.

DOI: 10.1109/pesc.2007.4342381

Google Scholar

[4] D. Krug, S. Bernet, S. S. Fazel, et al. Comparison of 2. 3-kV medium-voltage multilevel converters for industrial medium-voltage drives[J]. IEEE Transaction on Industrial Electronics, 2007, 54(6): 2979-2992.

DOI: 10.1109/tie.2007.906997

Google Scholar

[5] W. K. Johann, F. Thomas, R. Jose, W. Patrick. Review of Three-Phase PWM AC-AC Converter Topologies[J]. IEEE Transactions on Industrial Electronics. 2011: 99-105).

DOI: 10.1109/tie.2011.2159353

Google Scholar