Characteristic analysis of hysteresis-type Bi-2223 bulk motor with the use of equivalent circuit

Abstract

Characteristics of a hysteresis-type Bi-2223 bulk motor were studied based on the equivalent circuit. The Bi-2223 bulk motor consists of a disk shaped Bi-2223 bulk rotor and a 3-phase, 4-pole stator. The locked-rotor test results were discussed in this study. Stator impedance was directly obtained through the measurement, and then the rotor resistance was estimated from the equivalent circuit with some assumptions. In order to show the validity of the equivalent circuit, the experimental results were compared with the calculated results using the circuit. It was shown that the calculated results of the torque curves agree semi-quantitatively with the experimental results. Based on the equivalent circuit, temperature dependence of the rotor resistance is also to be presented and discussed.