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Pollution flashover of insulator strings is one of the most serious natural disasters in transmission line, and it is dangerous to the power grid. The three voltage applied methods of impulse voltage, power frequency pre-voltage and impulse voltage superimposed on power frequency were built to do the research, and influence of power frequency pre-voltage, partial drying effect of power frequency leakage...
A flux-switching permanent-magnet (PM) (FSPM) machine is a new class of stator-PM brushless machines, which offers the advantages of high reliability, high power density, and high efficiency. In this paper, by employing redundant winding in the existing FSPM machine topology, a new redundant FSPM (R-FSPM) machine is proposed for a fault-tolerant operation of critical applications. The redundant winding...
Fault-tolerant flux-switching permanent magnet (FT-FSPM) motor is a new class of stator-PM brushless motors, a potential candidate for many applications where reliability and power density are of importance. In this paper, a new method is proposed for torque ripple minimization, in which the key is to introduce harmonic currents to compensate for non-ideal sinusoidal back-EMF. Moreover, a fault-tolerant...
In this paper, a nonlinear magnetic circuit network model is proposed for a three-phase 12-stator-slot/10-rotor-pole hybrid-excited flux-switching machine for electrical vehicles, which can predict the static electromagnetic characteristics, including the open-circuit air-gap field distributions, phase PM flux-linkage, phase back-electromotive force (back-EMF) waveform and winding inductances. To...
In this paper, a nonlinear magnetic network model considering saturation is proposed for a three-phase 12-stator-slot/10-rotor-pole flux-switching permanent-magnet motor, which can predict the open-circuit air-gap field distribution, phase PM flux-linkage, phase back-electromotive force (back-EMF) waveform and winding inductances with considerable accuracies. The predicted results are confirmed by...
In this paper, two novel structures of linear double salient permanent magnet motor (LDSPM) having magnets, armature windings in primary are proposed and compared, including the configurations and static characteristics based on finite element analysis. The results indicate that the proposed topology can avoid the asymmetry of back-EMF waveforms and reduce cogging force and thrust force ripple.
A modular permanent magnet (MPM) machine is a remerging fault tolerant machine, offering the advantages of fault tolerance, high power density and high efficiency. In this paper, the analytical design of a MPM motor with halbach PM array is investigated and a general design procedure is presented. Moreover, finite element method (FEM) is adopted to compare the electromagnetic performance of the designed...
In this paper, a permanent magnet brushless machine for wind power with novel concentrated windings, is introduced, in which the special combination of stator slots/rotor poles is employed, resulting in high power density and low cogging torque. The distinct topology and operation principle are analyzed by using a 3-phase 24/22-pole prototyped machine as an example. Based on finite element method,...
In this paper, a new permanent magnet (PM) linear motor is proposed, in which both the magnets and armature windings are placed in the short mover, while the long stator consists of iron core only. Hence, this new PM linear motor can be called as primary permanent magnet linear motor, which exhibits the advantages of robust and simple mover, low cost, high efficiency, high power factor, and high thrust...
In this paper, a nonlinear magnetic circuit network model for the analysis of a three-phase 12-stator-slot/10-rotor-pole flux-switching permanent-magnet (FSPM) motor is proposed considering localized saturation effect, which enables the predictions of open-circuit air-gap field distributions, phase flux-linkage, phase back-electro-motive-force (back-EMF) and winding inductances waveforms. Further,...
In this paper, a novel stator hybrid excited doubly salient (HEDS) machine is proposed, which combines the advantages of PM machines with the possibility of controllable magnetic flux by auxiliary dc excited windings. The influence of end-leakage effect on the back-EMF waveforms is taken into account. The electromagnetic performances are predicted and compared with 2-D and 3-D finite element analyses...
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