基于DFT的感应电机转子谐波磁通密度高效分离方法及负载条件下变频电机转子铁耗特性

doi:10.19595/j.cnki.1000-6753.tces.171559

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Abstract

Effected by the harmonics from supply and induction motors, the distribution characteristics of iron losses, especially rotor iron losses, become more complicated in converter-fed induction motors. Accurate prediction and fine analysis of iron loss are very important at the design stage of high-efficiency inverter-fed induction motor. However, identification of rotor flux density harmonics is very difficult. This low-frequency signal contains dozens of power supply cycles simulation data, which causes discrete fourier transforming (DFT) cannot be directly used to computed the rotor flux density harmonics. In order to solve those problems, this paper first proposes a new method to identify rotor flux density harmonics using data from a single supply cycle; by using piecewise parameter iron loss model, the variation characteristics of rotor iron loss and the spatial distribution of hysteresis and eddy current losses in variable frequency induction motor are obtained under various operating conditions. The achievements provide important theoretical support for the design of high-efficiency inverter-fed induction motors.

Key words： Induction motors discrete fourier transforming iron losses harmonic fields rotor flux density

Received: 16 November 2017 Published: 10 January 2019

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TM358

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	Articles by authors
	Zhang Dongdong
	Guo Xinzhi
	An Ruichi
	Bu Lixiao
	Li Haifeng

Cite this article:

Zhang Dongdong,Guo Xinzhi,An Ruichi等. A Separation Method of Rotor Flux Density Harmonics Based on DFT and Fine Analysis Rotor Iron Losses in Inverter-Fed Induction Motors[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 75-83.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171559 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I1/75

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