馈能型恒压钳位双极性脉冲电流源
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摘要
在地球物理探测、PCB深孔电镀领域,需要下降沿高度线性、高度稳定、短关断延时、良好的正负向一致性的双极性脉冲电流源,但在大电感负载、小回路电阻以及低电压供电电源场合,要得到理想的脉冲电流非常困难。基于此,提出一种馈能型恒压钳位脉冲电流源电路,该电路通过对电流下降期间的负载实行恒定的高压钳位,达到加速负载电流下降的目的。分析了电路的工作原理,讨论了电路参数优化计算,从负载电流下降沿波形的线性度和稳压电容电压波动范围出发,给出了恒压电路中电感值和提升电容值的最优值选取方法,并通过仿真和实验,验证了理论分析的正确性。与已报道电路相比,该电路关断延时短,下降沿线性度高,能量消耗少,且具有脉冲上升沿提升能力,适用于要求较高的脉冲电流源场合。
In the fields of geophysical exploration and PCB plating process, it is necessary to create a bipolar pulse current source with decline edge of high linearity, high stability, short turn-off time and better positive and negative consistency. However, it's difficult to obtain ideal pulse current especially with high inductor load, low loop resistance and low input voltage. In this paper, an energy-feedback and constant voltage clamp pulse current circuit is represented, which can accelerate the decline of load current by clamping the load with constant high voltage in the period of load current declining. At first, the working principle of this circuit is discussed. Secondly, by investigating the wave linearity of load current decline edge and permitted fluctuating range of stabilizing voltage capacitor, the method is given to select the optimal capacitor value and inductor value of steady voltage circuits. At last, the results of simulation proves the proposed circuit meeting the predefined requirements much better than those reported, with significantly shorter turn-off time, higher linearity, less energy consumption and the particular ability of enhancing the rising edge of load current. In general, this circuit can be applied in applications requiring a pulse current source with higher quality.
In the fields of geophysical exploration and PCB plating process, it is necessary to create a bipolar pulse current source with decline edge of high linearity, high stability, short turn-off time and better positive and negative consistency. However, it's difficult to obtain ideal pulse current especially with high inductor load, low loop resistance and low input voltage. In this paper, an energy-feedback and constant voltage clamp pulse current circuit is represented, which can accelerate the decline of load current by clamping the load with constant high voltage in the period of load current declining. At first, the working principle of this circuit is discussed. Secondly, by investigating the wave linearity of load current decline edge and permitted fluctuating range of stabilizing voltage capacitor, the method is given to select the optimal capacitor value and inductor value of steady voltage circuits. At last, the results of simulation proves the proposed circuit meeting the predefined requirements much better than those reported, with significantly shorter turn-off time, higher linearity, less energy consumption and the particular ability of enhancing the rising edge of load current. In general, this circuit can be applied in applications requiring a pulse current source with higher quality.
引文
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[2]白登海.瞬变电磁法中两种关断电流对响应函数的影响及其应对策略[J].地震地质,2001,23(2):245-251.Bai Denghai.The effect of two types of turn-off current on TEM responses and the correction techniques[J].Seismology and Geology,2001,23(2):245-251.
[3]Danijel Voncina,Janez Nastran.Current source for pulse plating with high di/dt and low ripple in steady state[C].Industrial Electronics,1999,ISIE'99,Proceedings of the IEEE International Symposium on Volume2,1999,2:753-756.
[4]Ales Leban,Danijel Voncina.Pulse current source with high dynamic[C].EUROCON2003,Computer as a Tool,The IEEE Region8Volume2,2003,2:297-300.
[5]张晓峰,胡庆波,吕征宇.基于BUCK变换器的无刷直流电机转矩脉动抑制方法[J].电工技术学报,2005,20(9):72-81.Zhang Xiaofeng,Hu Qingbo,LüZhengyu.Torque ripple reduction in brushless DC motor drives using a BUCK converter[J].Transactions of China Electrotechnical Society,2005,20(9):72-81.
[6]唐竞新,祝永进.脉冲电流源型步进电机驱动器的研究[J].清华大学学报(自然科学版),1999,39(9):122-126.Tang Jingxin,Zhu Yongjin.Research of the stepping motor driver with switch constancy current source[J].J.Tsinghua Univ.(Sci.&Tech.),1999,39(9):122-126.
[7]曹建章,宋建平,唐天同.功率MOSFET开关电路的吸收回路实验研究[J].电力电子技术,1997,31(4):58-60.Cao Jianzhang,Song Jianping,Tang Tiantong.Experimental development of the snubber circuit for power MOSFET switch circuit[J].Power Eclectronics,1997,31(4):58-60.
[8]P Turoskey,S Zach.Deep earth detection by EM signals[C].The21st IEEE Convention of the Electrical and Electronic Engineers,Israel,2000:175-178.
[9]付志红,周雒维,苏向丰,等.两种新颖的准谐振型电流陡脉冲整形电路[J].中国电机工程学报,2006,26(5):70-75.Fu Zhihong,Zhou Luowei,Su Xiangfeng,et al.Two novel quasi-resonant steep current impulse rectifying circuits[J].Proceedings of the CSEE,2006,26(5):70-75.
[10]逄锡森,郁可.圆环导线自感系数的计算[J].山东建材学院学报,1994,8(1):91-94.Pang Xisen,Yu Ke.Calculation of self-inductance coefficient of circle conducting wire[J].Journal of Shandong Institute of Building Materials,1994,8(1):91-94.
[11]张占松,蔡宣三.开关电源的原理与设计[M].北京:电子工业出版社,2005.
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