Title :
Torque prediction using the flux-MMF diagram in AC, DC, and reluctance motors
Author :
Staton, David A. ; Deodhar, Rajesh P. ; Soong, Wen L. ; Miller, Timothy J E
Author_Institution :
Control Tech. plc, Newtown, UK
Abstract :
This paper uses the flux-MMF diagram to compare and contrast the torque production mechanism in seven common types of electric motor. The flux-MMF diagram is a generalized version of the flux-linkage versus current (ψ-i) diagram for switched-reluctance motors. It is illustrated for switched-reluctance, synchronous-reluctance, induction, brushless AC, brushless DC, interior PM and commutator motors. The calculated flux-MMF diagrams for motors with the same electromagnetic volume, airgap, slotfill, and total copper loss are shown and are used to compare the low-speed torque and torque ripple performance. The motor designs used were reasonably optimized using a combination of commercially available motor CAD packages and finite-element analysis
Keywords :
brushless DC motors; commutator motors; electric machine CAD; electric machine analysis computing; finite element analysis; induction motors; machine theory; magnetic flux; permanent magnet motors; reluctance motors; rotors; stators; torque; CAD packages; airgap; brushless AC motor; brushless DC motor; commutator motor; computer simulation; copper loss; electromagnetic volume; finite-element analysis; flux-MMF diagram; induction motor; interior PM motor; low-speed torque performance; motor designs; slotfill; switched reluctance motor; synchronous reluctance motor; torque production mechanism; torque ripple performance; AC motors; Brushless DC motors; Brushless motors; Commutation; Copper; DC motors; Electric motors; Induction motors; Production; Torque;
Journal_Title :
Industry Applications, IEEE Transactions on
