چكيده به لاتين
One of the most important artificial petroleum lift methods is the electrical submersible pump. This kind of pump is placed in the well and near the gas and oil reservoir, and therefore, they operate in high temperature. Since the diameter of the well is limited, there is the same limit for the motor, hence, it is necessary to increase the length of the motor. The increment of the electrical motor length results in mechanical limits for the motor. According to these conditions, up to about one past decade just squirrel cage induction motors had been used. By the development of the permanent magnets with the high operational temperature, the permanent magnet motors become the candidate for the electrical submersible pumps. In this thesis, it is tried to investigate the effective parameters on design of the flux switching permanent magnet motor for electrical submersible applications. Accordingly, in the process of these motors constraints such as the minimum diameter of the shaft and the maximum of the distance between bearings are considered, then, the appropriate model of flux switching permanent magnet motor is developed for the optimization. The properties of this model is high accuracy and the capability of being utilized for all combination of the rotor and stator poles in flux switching machines. By the developed model and by the evolutionary computing algorithm of particle swarm optimization, for two motor with the pole combination of 10/12 and 14/12, the optimization is performed. Afterwards, the sensitivity analysis, study of the effect of the rotor tooth shape change, and rotor step-skewing is brought up. In the next step, besides introduction of the shaft twisting, this phenomena is modeled in flux switching permanent magnet motor for two states of steady-state and transient. After modeling this phenomena, the influence of the shaft length and diameter is study. In order to investigate the process of motor start under load, the electrical submersible pump load is modeled, and the motor starting is simulated under load condition. Then, for a general study, thermal analysis for this kind of motor is attended. Eventually, to verify the finite element model, a prototype of the flux switching motor is built and tested. The results show the finite element model validity.
