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This paper presents the mathematical model of dual-stator-winding induction generator (DWIG) for aircraft variable frequency ac generating system under asymmetric operation. Firstly, the asymmetric mathematical model of DWIG under the A-B-C three-phase static coordinate system is built. Then, for the asymmetric operation, the zero-axis component is considered, and the asymmetric mathematical model...
This paper presents a subdomain model suitable for high-speed surface-mounted permanent-magnet machines. The model is presented with a focus on computation time and calculations of some relevant values particular to high-speed machines. The results are compared to both finite element analysis simulations and measurements on an existing prototype. The good accuracy and the high computation speed of...
In rotating electrical machine design, the magnetic equivalent circuit based on the reluctance network method seems to be a fair tradeoff between computational time and precision. Therefore this paper deals with a semi-analytical calculation method of the direct and quadrature axis magnetic circuit in Reluctance Synchronous Machines (RSM) by the means of a nonlinear reluctance network. The corresponding...
This document represents a partial discharge (PD) classification by using Generalized Regression Networks (GRNN) model. Two PD classification models, GRNN1 with 11 input variables and GRNN2 with 3 selected derived statistic parameters, were investigated for classification of PD signals into 5 patterns, corona at high voltage side in air, corona at low voltage side in air, corona at high voltage side...
As the prime mover of industrial machines, the three-phase squirrel-cage induction motor (IM) has been typically used. Consequently, further price reduction has been required. Although the price has decreased on account of its change from distributed winding to concentric winding, IM with concentric winding has not been adequately studied. Therefore, in this study, we have examined the potential of...
Thermal management is the core technology of a modern motor with high efficiency, high power density and high reliability. This paper presents a set of models and an experiment platform for the analysis of wind fields and temperature fields in a high power permanent magnet motor with a closed heat dissipation structure. The three-dimensional temperature field and flow field were estimated by simulation...
This paper proposes a novel moving-coil voice coil motor(VCM) used for driving nano-positioning device. This VCM implements bilateral Halbach array permanent magnet as the stator and three separated coils with the slotted coil skeleton as the mover. The VCM can achieve large stroke and nano-level positioning accuracy with the support of the compliant mechanism. Equivalent magnetic circuit method and...
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