An analytical formula for the back emf of a slotted BLDG motor

Author

Markovic, Miroslav ; Perriard, Yves

Author_Institution

Ecole Polytech. Fed. de Lausanne (EPFL), Lausanne

Volume

2

fYear

2007

fDate

3-5 May 2007

Firstpage

1534

Lastpage

1539

Abstract

The paper presents a completely analytical formula to determine the phase back emf of a slotted BLDC motor with interior or exterior rotor and parallel or radial permanent magnet (PM) magnetization and concentrated winding. The formula is based on integration of an analytical solution for the PM magnetic field in the motor air gap. Six combination of the number of slots and number of poles (N_g/N_p) are considered: 6/4, 9/6, 6/8, 12/10, 9/12 and 12/14. The results are verified using a finite elements software.

Keywords

air gaps; brushless DC motors; electric potential; magnetic fields; magnetisation; permanent magnets; PM magnetic field; brushless dc motor; concentrated winding; exterior rotor; finite elements software; interior rotor; motor air gap; parallel permanent magnet magnetization; phase back emf; radial permanent magnet magnetization; slotted BLDC motor; Brushless DC motors; Magnetic analysis; Magnetic fields; Magnetic flux; Permanent magnet motors; Permanent magnets; Permeability; Rotors; Saturation magnetization; Teeth;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Machines & Drives Conference, 2007. IEMDC '07. IEEE International

Conference_Location

Antalya

Print_ISBN

1-4244-0742-7

Electronic_ISBN

1-4244-0743-5

Type

conf

DOI

10.1109/IEMDC.2007.383656

Filename

4270876