Title :
Modeling for the design of fractional slot PM machines with concentrated windings protected from demagnetization during three-phase short circuit
Author :
Xuan, Hung Vu ; Polinder, Henk ; Lahaye, Domenico ; Ferreira, Jan A.
Author_Institution :
Electr. Power Process. Group, Delft Univ. of Technol., Delft, Netherlands
Abstract :
This paper presents a guideline for determining the thickness of permanent magnets in fractional slot permanent magnet machines with concentrated windings so that demagnetization can be alleviated or avoided even during three-phase short circuit fault. An analytical model for calculating the magnetic field, inductance, and three-phase short circuit current is investigated. A transient two-dimension FEM model including rotor motion and coupling with a circuit model is developed for checking the partial demagnetization of magnets. Analytical calculation, FEM simulation, and experimental results of synchronous inductance and three-phase short circuit show good agreement.
Keywords :
demagnetisation; finite element analysis; machine windings; permanent magnet machines; rotors; short-circuit currents; PM machines; concentrated windings; demagnetization; fractional slot permanent magnet machines; inductance calculation; magnetic field calculation; rotor coupling; rotor motion; three-phase short circuit; three-phase short circuit fault; transient two-dimension FEM model; Analytical models; Demagnetization; Inductance; Integrated circuit modeling; Magnetic flux; Transient analysis; Windings; Analytical model; PM machines; demagnetization; three-phase short circuit; transient FEM model;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2012 IEEE
Conference_Location :
Raleigh, NC
Print_ISBN :
978-1-4673-0802-1
Electronic_ISBN :
978-1-4673-0801-4
DOI :
10.1109/ECCE.2012.6342669
