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

Volume

1

fYear

2003

Firstpage

443

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines and Drives Conference, 2003. IEMDC'03. IEEE International

Print_ISBN

0-7803-7817-2

Type

conf

DOI

10.1109/IEMDC.2003.1211301

Filename

1211301