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| Control System of Dual Three-Level Doube-Fed Induction Motor |
| Ye Zongbin, Li Hao, Jing Wei, Hou Zhoufeng |
| China University of Mining and Technology Xuzhou 221008 China |
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Abstract The double-fed control strategy for double-fed induction motor is investigated in this paper. The AC/DC/AC converter is used as main circuit. Three phase three-level rectifier is used as AC/DC block. This rectifier works with low grid side's harmonic distortions .Besides, it maintains a high power factor while the energy flows in bidirectional way. For the DC/AC converter, three-level inverter is adopted. Using stator-flux oriented vector control, the double-fed induction motor gains a high dynamic performance when the stator side is controlled operating in an unity power factor condition. In this paper a novel simplified space-vector pulse width modulation (SVPWM) method was proposed to simplify the space-vector diagram of a three-level inverter into that of a two-level inverter. The neutral-point potential balance can be easily realized with this method.
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Received: 29 November 2007
Published: 14 February 2014
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2009, Vol. 24 
