Experimental Measurement and Analysis of the Self and Mutual Inductances in Two Different Switched Reluctance Machines

Abstract

This paper aims to present a comparative study

among the self and the mutual inductances of a 6x4 switched

reluctance machine prototype. Se same study was made with a

French origin 8 x 6 machine. The second study confirmed the

conclusions on the first one. Mechanical adaptations were

made in the test bench to strongly block the rotor of the

machines in any previously defined position in order to allow

the experimental measurements. At each rotor angular position

data were collected for different currents, step by step. The

rotor position was also changed step by step from the aligned

position to the position of minimum inductance. A data bank

was constructed depending on both: rotor angular position and

current. A mathematical model taking into account the mutual

inductances is presented. Also are presented simulations results

using the data got in the test bench. Results of simulations

made with and without the mutual inductances values were

compared. Surfaces that represent the inductances are presented

for both machines. The results analyses show that the mutual

inductances may have important influence in the simulation,

design and, therefore, in the switched reluctance machines

performance.