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R. Belmans Laboratory for Electrical Machines and Drives Deparatment of Electrical Engineering Katholeike Univeriteit Leuven R. D. Findlay Department of Electrical & Computer Engineering McMater University W. Geysen Laboratory for Electrical Machines and Drives Department of Electrical Engineering Katholeike Universiteit Leuven |
A Circuit Approach to Finite Element Analysis of a Double Squirrel Cage induction MotorThis paper presents a method for analyzing the losses and the torque of an induction motor with double cage rotor. The tentative values for the currents for the analysis are found using an analytical procedure. The parameters of an equivalent circuit are then calculated from a finite element method. The actual current estimates are found from the obtained circuit which are used to establish a corrected field distribution.Using the losses due to eddy currents, the equivalent resistance of the rotor may be calculated, hence the torque. Assuming linearity, the complex power yields the inductances. The resulting equivalent circuit can the yield a better estimate for the current. This constitutes an iterative procedure which can be continued to any desired convergence accuracy for the currents. |
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