Title :
Iron and Magnet Losses and Torque Calculation of Interior Permanent Magnet Synchronous Machines Using Magnetic Equivalent Circuit
Author :
Tariq, Abdul Rehman ; Nino-Baron, Carlos E. ; Strangas, Elias G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA
Abstract :
We present a faster and simpler approach for the calculation of iron and magnet losses and torque of an interior permanent-magnet synchronous machine (IPMSM) than finite-element methods (FEM). It uses a magnetic equivalent circuit (MEC) based on large elements and takes into account magnetic saturation and magnet eddy currents. The machine is represented by nonlinear and constant reluctance elements and flux sources. Solution of the nonlinear magnetic circuit is obtained by an iterative method. The results allow the calculation of losses and torque of the machine. Due to the approximations used in the formulation of the MEC, this method is less accurate but faster than nonlinear transient magnetic FEM, and is more useful for the comparison of different machine designs during design optimization.
Keywords :
eddy currents; equivalent circuits; iron; iterative methods; magnetic circuits; permanent magnet machines; synchronous machines; torque; Fe; design optimization; flux sources; interior permanent magnet synchronous machines; iterative method; magnet eddy currents; magnet loss; magnetic equivalent circuit; magnetic saturation; nonlinear constant reluctance elements; nonlinear magnetic circuit; torque calculation; Finite element methods; Iron; Magnetic cores; Magnetic flux; Rotors; Saturation magnetization; Stators; Accuracy; efficiency; magnetic scalar potential; permanent magnets; permeability; permeance; reluctance; saturation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2074207