Electromechanical analysis of a machine

C. C. Awah; O. Obasi; C. A. Amaghionyeodiwe; G. C. Diyoke; I. K. Nnabuenyi; S. E. Oti

C. C. Awah Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike
O. Obasi Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike
C. A. Amaghionyeodiwe Department of Mechanical Engineering, Michael Okpara University of Agriculture, Umudike
G. C. Diyoke Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike
I. K. Nnabuenyi Instrument QA/QC Arco M&E, NLNG Sub Contractor, Bonny, Rivers State, Nigeria
S. E. Oti Department of Electrical Engineering, University of Nigeria, Nsukka

Keywords: Field-weakening, Induced-voltage, Magnetic remanence, Torque

Abstract

Output performances such as induced-voltage and torque of an electric machine are investigated in this study, with particular reference to its pole number effects. The analyses are made using 2D-finite element method. The study revealed that the investigated machine having 6 stator slots and 11 pole number i.e. 6S/11P has the highest amount of magnetic remanence, coercive force and flux linkage amongst the compared machine types. Consequently, these highest values would yield the largest output torque in the machine. Desirably, high output torque is also relatively realized in the 6S/13P machine type. Nevertheless, both the 6S/11P and 6S/13P machine types would be adversely affected by large effect of magnetic force on its rotor. The greatest field-weakening ability, determined as a measure of the machine’s speed ratio is provided by 6S/13P machine topology and this trait is desired in traction and propulsion systems. The most competitive torque is also obtained from 6S/13P machine, considering its yield with respect to the employed magnet volume.

Author Biographies

O. Obasi, Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike

Technologist

C. A. Amaghionyeodiwe, Department of Mechanical Engineering, Michael Okpara University of Agriculture, Umudike

Senior Lecturer

G. C. Diyoke, Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike

Senior Lecturer

I. K. Nnabuenyi, Instrument QA/QC Arco M&E, NLNG Sub Contractor, Bonny, Rivers State, Nigeria

Electrical Engineer

S. E. Oti, Department of Electrical Engineering, University of Nigeria, Nsukka

Associate Professor