Polyphase induction motor performance computed directly by finite elements

Author

Brauer, John ; Sadeghi, Hamid ; Oesterlei, Robert

Author_Institution

Ansoft Corp., Milwaukee, WI, USA

Volume

14

Issue

3

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

583

Lastpage

588

Abstract

Finite element analysis is used to directly compute torques and currents of an induction motor, without need for any equivalent circuit. The AC voltages are applied by means of 0D and 1D finite elements, and the fields and related parameters are computed by nonlinear transient finite element analysis with adaptive time stepping. Equations are derived that allow balanced polyphase motors to be analyzed at any speed without rotating the rotor finite elements, and for torque to be computed directly from power loss. Computed torques and currents of a typical highly saturated polyphase motor with closed rotor bars are shown to agree quite well with measurements

Keywords

equivalent circuits; finite element analysis; induction motors; losses; machine theory; rotors; 0D finite elements; 1D finite elements; adaptive time stepping; closed rotor bars; equivalent circuit; finite elements analysis; highly saturated polyphase motor; nonlinear transient finite element analysis; polyphase induction motor performance; power loss; torque; Bars; Circuit analysis computing; Equivalent circuits; Finite element methods; Induction motors; Nonlinear equations; Rotors; Torque; Transient analysis; Voltage;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.790918

Filename

790918