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| Electronic Pole-Changing Speed Adjusting Technology of Multiphase Induction Motors Based on Vector Control |
| Yang Jiaqiang, Gao Jian, Jin Yulong, Hu Haofeng |
| Zhejiang University, Hangzhou 310027 China |
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Abstract In order to extend the range of a constant-power speed regulation of the AC drive system, the electronic pole-changing (EPC) technique of multiphase induction motor (IM) is proposed, which is based on studying multiphase system transform theory and the rotor field oriented vector control (RFOVC) of multiphase motor. This technique will extremely expand a constant-power speed range without increasing the volume or current of an IM. The harmonic currents are generated in different orthogonal planes by RFOVC to realize EPC without poweroff. The process of pole-changing is smooth, without high torque impulses. The proposed technique was verified by an EPC experiment of a 9-phase IM, giving the experimental results of EPC between 3-pair poles and 9-pair poles based on RFOVC. The experimental results show that the proposed technique is feasible to realize pole-changing without poweroff and the pole changing technique proposed can effectively extend the operation range of multiphase IM.
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Received: 21 February 2012
Published: 17 June 2014
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2014, Vol. 29 
