Investigate the performance characteristics of three phase synchronous machine

Abstract

The paper presents a step by step procedure to identify the parameter values of synchronous machines and determine the equivalent circuit. Furthermore the study expands to exam the performance characteristics of the machines. In other wards study the three phase synchronous machines behaviour in steady-state or dynamic behaviour. The results are exposed that the advantage of three phase synchronous machines and why three phase synchronous machines have been used for widely range in electrical system applications and network grid. Usual standards recommend different tests on a platform in order to determine these parameters. This report include the result of tests at open circuit characteristic (OCC) and short circuit characteristic (SCC) of the machine, open loop voltage/frequency (V/F) control mode of the drive system, operating with high frequency PWM (pulse width modulation), exhibits the impact of load changes on the synchronous motor with a fixed field excitation by plotting the phasor diagram and impact of varying field excitation on the synchronous motor with fixed load in terms of V-curves. Furthermore the correlation between current, excitation and torque is investigated. The purpose of this experiment is to obtain the machines parameters experimentally and comparing with manufacture data sheet. Eventually, discussing the obtained results for all milestones individually.