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In order to solve the problem of accurate simulation modeling and equation solving difficulties of asynchronous motor broken bar fault. By using the simulation module of the winding asynchronous motor, establish the simulation model of the simple broken bar fault in the SIMULINK environment. We discuss the motor current fault diagnosis method of broken bars fault by changing the external resistors...
This paper deals with deep bar effect in squirrel cage rotors. Induction machines using this type of rotor are widespread. Some cages enhance the deep bar effect to improve the starting performances. In cited references, the analytical calculation of the equivalent circuit parameters has only been investigated for single-cage and double-cage rotors. In this paper, an analytical model is developed...
Rotary machines have limitations at linear moving systems. So linear motors make good used of linear actuator. The purpose of this paper is concerned with the characteristic analysis to thickness of secondary conductor in TLIM using axisymmetric model. Characteristic equations of TLIM are obtained from voltage equation. Using finite element method (FEM), parameters of voltage equation are calculated...
Because of the large airgap and main factors vary with diameter, traditional analysis method results in large error in analyzing axial field motor, and the skin effect can't be described accurately. A new disc induction motor electromagnetic model is proposed. Sub-loop calculation and multi-layer model are used to solve the key issues and improve the model accuracy. T model equivalent circuit of the...
The aim of this paper is to analyze the positional variation of starting torque in a 3-phase induction motor. This can depend on different factors: manufacture of the rotor (fabricated or cast), skewing of the rotor bars, broken bars (and position of the break), rotor eccentricities, and other possible asymmetries. In the study, different rotors are experimentally tested and a hybrid analytical/finite...
Thermal analysis is an important design aspect and becoming a more important component of the electric motor design process due to the push for reduced weights and costs and increased efficiency. The accuracy of analytical thermal models depends on the accuracy of the thermal resistance computation and on the number of nodes in the equivalent thermal circuit. In this paper several thermal analytical...
The skin effect of rotor current is one of key factors which affect the simulation accuracy of three-phase induction motors with deep rotor bars. This paper proposes an improved dynamic model considering the skin effect of three-phase induction motors at arbitrary operation, from the starting to rated-load operation. The simulation results using the proposed model are compared with those from the...
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