论文信息 - A Design Method for Non-Skewed Small and Medium Cage Induction Motors

A Design Method for Non-Skewed Small and Medium Cage Induction Motors

This paper presents a design method for non-skewed small and medium cage induction motor based on the finite element analysis, in which the approaches of asymmetrical rotor slots, closed slots, nearly slot combination and reasonable air-gap length are adopted and studied systematically. With this method, the cage induction motors with non-skewed rotor bars can be realized meanwhile, the slot harmonic, which is caused by slot opening, can be eliminated effectively and the efficiency can also be improved apparently. Finally, a design example for a 5.5 kW induction motor is also presented.

Liu Xiaofang | Luo Yingli | Zhao Haisen | Cui Xueshen | Lu Weifu

[1] S. Williamson,et al. The variation of cage motor losses with skew , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[2] Byung-Taek Kim,et al. Analysis of axially non-uniform loss distribution in 3-phase induction motor considering skew effect , 1999 .

[3] G. Bertotti. General properties of power losses in soft ferromagnetic materials , 1988 .

[4] S. Williamson,et al. The influence of rotor skew on cage motor losses , 1997 .

[5] S. Williamson,et al. Representation of skew in time-stepped two-dimensional finite-element models of electrical machines , 1994 .

[6] Yingli Luo,et al. Time-stepping finite element analysis on the influence of skewed rotors and different skew angles on the losses of squirrel cage asynchronous motors , 2011 .

[7] D.G. Dorrell,et al. A Multisliced Finite-Element Model for Induction Machines Incorporating Interbar Current , 2009, IEEE Transactions on Industry Applications.

[8] C.B. Rasmussen,et al. Analysis and Effects of Inter-Bar Current and Skew on a Long Skewed-Rotor Induction Motor for Pump Applications , 2007, IEEE Transactions on Magnetics.

[9] Chen Weihua. Stator Slot Optimal Design of Premium Motors Based on Time-stepping Finite Element Method , 2011 .

[10] Y. Kawase,et al. Effects of Skew Angle of Rotor in Squirrel-Cage Induction Motor on Torque and Loss Characteristics , 2009, IEEE Transactions on Magnetics.