# Inclusion of interbar currents in a network-field coupled time-stepping finite-element model of skewed-rotor induction motors

## Abstract

In order to include the interbar currents of skewed-rotor inductor motors in finite-element analysis, a three-dimensional (3-D) model is usually necessary. In this paper a two-dimensional multislice time-stepping finite element method of skewed-rotor induction motors is presented to solve such complicated 3-D problems. It is shown that the network of the rotor cage is coupled to finite-element equations so that the interbar currents in the rotor can be taken into account. By arranging the unknowns and mesh-current equations ingeniously, the resultant coefficient matrix of the global system equations are made symmetrical. Compared with 3-D finite-element methods, the computation time for solving field equations with the proposed method is significantly shorter. The model can be used to estimate the high-order harmonic stray losses in induction motors. A comparison between computed and tested results is also given.

- Authors:

- Publication Date:

- Research Org.:
- Hong Kong Polytechnic Univ., Kowloon (HK)

- OSTI Identifier:
- 20000590

- Resource Type:
- Journal Article

- Journal Name:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

- Additional Journal Information:
- Journal Volume: 35; Journal Issue: 5Pt3; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ELECTRIC MOTORS; FINITE ELEMENT METHOD; ELECTRIC CURRENTS; TWO-DIMENSIONAL CALCULATIONS; COMPARATIVE EVALUATIONS; ENERGY LOSSES

### Citation Formats

```
Ho, S.L., Li, H.L., and Fu, W.N.
```*Inclusion of interbar currents in a network-field coupled time-stepping finite-element model of skewed-rotor induction motors*. United States: N. p., 1999.
Web. doi:10.1109/20.799070.

```
Ho, S.L., Li, H.L., & Fu, W.N.
```*Inclusion of interbar currents in a network-field coupled time-stepping finite-element model of skewed-rotor induction motors*. United States. doi:10.1109/20.799070.

```
Ho, S.L., Li, H.L., and Fu, W.N. Wed .
"Inclusion of interbar currents in a network-field coupled time-stepping finite-element model of skewed-rotor induction motors". United States. doi:10.1109/20.799070.
```

```
@article{osti_20000590,
```

title = {Inclusion of interbar currents in a network-field coupled time-stepping finite-element model of skewed-rotor induction motors},

author = {Ho, S.L. and Li, H.L. and Fu, W.N.},

abstractNote = {In order to include the interbar currents of skewed-rotor inductor motors in finite-element analysis, a three-dimensional (3-D) model is usually necessary. In this paper a two-dimensional multislice time-stepping finite element method of skewed-rotor induction motors is presented to solve such complicated 3-D problems. It is shown that the network of the rotor cage is coupled to finite-element equations so that the interbar currents in the rotor can be taken into account. By arranging the unknowns and mesh-current equations ingeniously, the resultant coefficient matrix of the global system equations are made symmetrical. Compared with 3-D finite-element methods, the computation time for solving field equations with the proposed method is significantly shorter. The model can be used to estimate the high-order harmonic stray losses in induction motors. A comparison between computed and tested results is also given.},

doi = {10.1109/20.799070},

journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},

issn = {0018-9464},

number = 5Pt3,

volume = 35,

place = {United States},

year = {1999},

month = {9}

}