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Rotor mechanical properties under high acceleration is affected synthetically by a number of factors, in order to improve the operating characteristics of the rotor, the rotor with holes will be taken as the example, then the finite element model of the rotor with parallelism error is established, and by changing the distance between the hole and the rotor rotation center (denoted e), the influence...
The cage rotor is an important component of O-Sepa classifier. The different construction of case rotor affect directly on characteristic of classifier flow field. The structure is analyzed and numerical value model is built on O-Sepa classifier in the paper. FLUED soft is applied in the study. In order to investigate the effect of structural variations of bottom plate on flow field characteristics,...
This paper presents an analytical model for prediction of open circuit eddy current loss in armature windings and permanent magnets of series double excitation synchronous machines. The developed model can either be used in the case of internal or external rotor radial-field machines topologies. First, a 2D exact analytical solution of open circuit magnetic field distribution in an actual geometry...
In this paper a simple dynamic circuit-based model for a rotor surface mounted PMSM with inter-turn winding short-circuit fault is presented. Finite element analysis is used for parameter determination and study the PMSM under fault conditions. The Analytical expressions are proposed for determining the fault model parameters. The proposed circuit model and parameter expressions are validated by time...
A modeling method of parameterized flexible virtual prototype of disc brake was provided by the united application of finite element modeling (FEM) and dynamics analysis method. A virtual prototype of disc brake was created, in which the rotor, backplates and brake pads are flexible parts. A typical dynamics analysis in condition of the fully loaded braking process at the initial velocity of 60 km/h...
When a rotor is simultaneously rotated and translationally moved above an aluminum guideway a traveling time-varying magnetic field is created in the air-gap. This field induces eddy currents in the guideway that can simultaneously create suspension and propulsion or breaking forces. The field and forces created by this moving rotor are modeled using a novel 2D analytic based A-φ method in which the...
In order to fully understand the characters and working principles of non-grid-connected wind turbine, this paper makes an analysis on different methods for modeling non-grid-connected wind turbine. First, according to the structure of the wind turbine, a theoretical model is presented, including three subsystems: rotor, transmission system and generator. Response of the model to a wind sequence is...
Rotor unbalance is the main vibration excitation source of rotating machinery accounting for 60~70% of the total machine fault. In this paper, unbalance fault and dynamic balancing are simulated by the virtual prototyping technology based on the unbalance mechanism and balancing theory. The single-face and double-face dynamic balancing are studied. The results validate the correctness and feasibility...
This paper presents a reduction method of vibration based on decreased cogging torque for interior type permanent magnet motor. The vibration source which affects biggest in the vibration of the interior type permanent magnet motor is the force, cogging torque, of the radius direction in compliance with a magnetic energy from between stator and the rotor. The notch is established in the rotor because...
A dynamic analytical model is developed to simulate the performance of switched reluctance motors (SRM). In this model, flux linkages are expressed as multiple decoupled one- argument functions, either current dependent or rotor position dependent, instead of one two-argument function dependent on both current and rotor position. Using this analytical model, the performance of a SRM can be simulated...
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