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为了满足强磁场装置电源供电极低电流纹波的要求,采用了并联有源电力滤波器。首先简述了并联有源电力滤波器的工作原理,并设计了一种新型的双向DC-DC变换器取代了以往并联有源电力滤波器中使用的水冷电阻,实现了对并联有源电力滤波器中的电容器进行快速充电与快速放电,从而降低了能量损耗。然后详细分析了变换器快速充电与快速放电的工作过程,并给出了具体的设计参数。最后进行了仿真验证,通过仿真波形可以看出,该双向DC-DC变换器可以正常工作,能够顺利实现能量的双向流通,满足并联电力有源电力滤波器的设计要求。 相似文献
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The superconducting outsert of the 40 T hybrid-magnet in High Magnetic Field Laboratory (HMFL) of Chinese Academy of Sciences (CAS) requires a highly stabilized power supply. In this paper, two kinds of power supply design are briefly presented and both advantages and disadvantages are analyzed. In order to overcome the drawbacks of switching power supply, a series regulated active filter is adopted and a new design is proposed which ensures cooperative relationship between the feedback control loops of the switching converter and the series regulated active filter. Besides, unlike the traditional switching power supply, which can generate positive voltage only, this new design can also generate negative voltage which is needed in the quench protection for the superconducting magnet. In order to demonstrate the effectiveness of the methodology, a low-power prototype has been accomplished. The simulation and experiment results show that the power supply achieves high precision under the combined action of two feedback control loops. The peak-to-peak amplitude of the output ripple voltage of the prototype is 0.063%, while the peak-to-peak amplitude of the output ripple current is 120 ppm. 相似文献
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