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In order to overcome the problems such as heavy distortion of winding current, low power factor and high cost of DC inductor met in the traditional rectified permanent magnet (PM) wind generation system, a circuit of cascaded single phase power factor correction (PFC) rectifier pair is proposed and discussed. In the new scheme, proper designed armature inductor of the generator is used as boost inductor,...
The residual reactance caused by frequency variation and the characters of secondary burdens are the main factors cause steady-state error of capacitor voltage transformer (CVT). In order to correct the error, the parametric model of CVT is established and the validity was confirmed by simulation and experimental data of accuracy test. A new method based on this model is proposed to correct the steady-state...
Starting toque is computed based on two-dimensional (2-D) FEM with a field-circuit coupled analysis. It is discussed that the starting performance of three-phase capacitor motor is better than that of conventional induction motor, in particular, for the operating condition with starting capacitor. The results of calculation are compared to tested values, and it is verified that this new type motor...
A double two-phase permanent magnet motor (DTPPM) system is proposed. It is shown that by connecting the neutral lines of a pair of two-phase machines, only four switches need to be used for each machine and the two machines share one set capacitors. This paper develops the mathematical model of this system and establishes the simulation model accordingly. Simulation results are given to demonstrate...
Nowadays, characteristics analysis of doubly salient electro-magnet machine is mostly about starter or generator separately, while transient characteristics of switching from starter to generator are less studied. Process of switching from starter to generator is an important part of the whole starter/generator system. In this paper, integral MATLAB model of doubly salient electro-magnet starter/generator...
This paper describes how to optimize the winding structure of LSPM with FEM, which includes the determination of turns ratio of the main and auxiliary windings, and the selection of capacitor. The motor can be optimized on the ground of the rough value of the windings ratio and the capacitor. The winding structure of the LSPM motor is very essential to form circular field, which is also of great importance...
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
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