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By the experiment modal research for rotor winding faults of induction motors, the electric motor fault diagnosis by means of vibration mode analysis is explored. Motor (the model is Y2-90S-4 in China), which is given an artificial rotor bar broken, is analyzed to study the difference of motor vibration mode under fault condition and normal condition respectively. By the experiment modal analysis,...
When motor faults (rotor broken-bar, stator turn- to-turn short, etc.) occur in a motor, its internal current distribution and electromagnetic field will change, which will further cause some variations to stator and rotor parameters. In this paper, the method conjoint of Finite Element Method and Energy Perturbation Method is used to calculate the motor's inductance parameter, and finite-element...
Vibration exists in the operation of induction motor is a kind of widespread phenomenon. The motor windings fault often causes its vibration change. This paper analysis the causes of motor electromagnetic vibration and establishes the experimental testing system of vibration under motor windings fault. Through the theory analysis and a great deal of experimental tests, the stator and rotor's radial...
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