Title :
General closed-form analytical expressions of air-gap inductances for surface-mounted permanent magnet and induction machines
Author :
Qu, Ronghai ; Lipo, Thomas A.
Author_Institution :
Electron. & Photonic Syst. Technol., Gen. Electr. Co., Niskayuna, NY, USA
Abstract :
General closed-form analytical expressions for air-gap inductance of surface-mounted PM and induction machines are derived without the assumption of sinusoidally wound windings. The expressions are suitable for all single- or double-layer, concentrated or distributed windings, and demonstrated to be identical with the winding function approach and share the same advantage that all the harmonics are inherently included. These expressions are straightforward analytical equations, which are easily used by machine designers.
Keywords :
air gaps; inductance; induction motors; machine theory; machine windings; permanent magnet motors; air-gap inductances; closed-form analytical expressions; distributed windings; induction machines; sinusoidally wound windings; surface-mounted PM machines; surface-mounted permanent magnet machines; winding function approach; Air gaps; Coils; Equations; Inductance; Induction machines; Machine windings; Magnetic analysis; Magnetic flux; Permanent magnets; Permeability;
Conference_Titel :
Electric Machines and Drives Conference, 2003. IEMDC'03. IEEE International
Print_ISBN :
0-7803-7817-2
DOI :
10.1109/IEMDC.2003.1211301
