Temperature Distribution Inside a Three-Phase Induction Motor Running with Eccentric Airgap

نویسندگان

  • Bruno BAPTISTA
  • André MENDES
  • Sérgio CRUZ
  • António CARDOSO
چکیده

Despite the emergence of new types of electric machines, the squirrel-cage induction motor remains the dominant one. A motor failure can result in large lost revenues. One of types of faults that can occur in these motors is airgap eccentricity. This paper presents results, based on a Finite Element Analysis. It is shown that static eccentricity leads to a non-uniform temperature distribution and contributes to the rise of the highest temperature spot in the motor, hence potentially shortening the lifespan of the stator insulation system. Streszczenie. Klatkowy silnik indukcyjny wciąż dominuje wśród maszyn elektrycznych. Jednym z typowych uszkodzeń tego silnika jest ekscentrycvz ność szczeliny powietrznej. Przeprowadzono analizę tego zjawiska wykorzystując metodę elementu skończonego. Statyczna ekscentryczność powoduje nierównomierny rozkład temperatury. (Rozkład temperatury w trzyfazowym silniku indukcyjnym z ekscentryczną szczeliną powietrzną)

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Analysis of Shaded Pole Induction Motors Considering Asymmetrical Flux Distribution and Saturation Effects

Several methods are available for performance prediction of single phase shaded pole induction motors. A simple model, in conjunction with a more complicated and accurate model, which considers the asymmetrical windings and core loss, is used to compare the prediction methods against experimental results. Saturation is incorporated in the model. Fundamental and harmonic flux density wave distri...

متن کامل

Dynamic eccentricity in squirrel cage induction motors - Simulation and analytical study of its spectral signatures on stator currents

Most of faults in three-phase induction motors have relationship with airgap eccentricity. There are two forms of airgap eccentricity: static (SE) and dynamic (DE). According to the literatures, the well known signatures of dynamic eccentricity, on the stator current spectra, are sidebands around the principal slot harmonics (PSH). However, many other researches have shown that DE induces also ...

متن کامل

Influencies of the Slits on Magnetic Flux Density for Induction Motors Having Different Rotor Slot Geometries

There are many methods in literature for canalizing of circulating useful flux from stator core to rotor core without radial movements in induction machines. It is obvious to healing of useful flux with decreasing radial moved zig-zag flux and it increases the motor performance. Magnetic barrier, cutout and using of slits are the most used methods for improve the circulating useful flux in the ...

متن کامل

Airgap Reluctance Identification for the Magnetic Equivalent Circuit Modelling of Induction Machines

This paper focuses on the airgap reluctances that connect stator and rotor teeth in a Magnetic Equivalent Circuit (MEC) model of an induction machine. A dimensionless analytical expression is adopted for the position dependence of these reluctances, the three degrees of freedom of which are identified and validated by Finite Element (FE) modelling, considering a simplified geometry and the comp...

متن کامل

Improvement of Electromagnetic Forces in a Single-Phase Induction Motor by Providing a New Winding Distribution

Single-phase induction motors have a wide range of domestic and industrial applications. These motors have a squirrel cage rotor and their stator usually has two windings: main and auxiliary. The use of auxiliary winding in the structure of single-phase induction motors creates two unbalance and asymmetric phases. This causes to increase the spatial harmonics of the field in the air gap, and al...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2011