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 supp...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.展开更多
在分析现有逆变式切割电源控制系统的缺点的基础上,提出基于极点配置的双闭环控制应用于大功率逆变式切割电源中的移相全桥零电压开关(phase shift full bridge zero voltage switched,PS-FB-ZVS)变换器。首先介绍PS-FB-ZVS变换器的小...在分析现有逆变式切割电源控制系统的缺点的基础上,提出基于极点配置的双闭环控制应用于大功率逆变式切割电源中的移相全桥零电压开关(phase shift full bridge zero voltage switched,PS-FB-ZVS)变换器。首先介绍PS-FB-ZVS变换器的小信号模型,然后分析基于极点配置理论的双闭环控制系统,进行逆变式切割电源的参数整定,最后通过仿真和实验证明:电流内环稳态和动态性能良好;具有电压外环的控制系统不仅获得恒定的空载电压,而且减小了空载损耗,使变压器不易饱和,降低了输出整流管电压应力;切割电源的这种双环控制系统克服了在起弧时2个并联环不停地切换而不容易转移成大弧的缺点,实现了无缝切换,具有响应速度快、超调不大、稳态误差小的优点,并且对外部干扰具有极强的鲁棒性。展开更多
基金supported by National Natural Science Foundation of China(No.50977086)
文摘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.
文摘在分析现有逆变式切割电源控制系统的缺点的基础上,提出基于极点配置的双闭环控制应用于大功率逆变式切割电源中的移相全桥零电压开关(phase shift full bridge zero voltage switched,PS-FB-ZVS)变换器。首先介绍PS-FB-ZVS变换器的小信号模型,然后分析基于极点配置理论的双闭环控制系统,进行逆变式切割电源的参数整定,最后通过仿真和实验证明:电流内环稳态和动态性能良好;具有电压外环的控制系统不仅获得恒定的空载电压,而且减小了空载损耗,使变压器不易饱和,降低了输出整流管电压应力;切割电源的这种双环控制系统克服了在起弧时2个并联环不停地切换而不容易转移成大弧的缺点,实现了无缝切换,具有响应速度快、超调不大、稳态误差小的优点,并且对外部干扰具有极强的鲁棒性。