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| A Consecutively Adjustable and High Stable DC Voltage Source with PWM Chopped Modulator |
| WANG Gang1,3, LAN Jiang2,3, CHEN Le1, LI Zheng-kun3, WANG Nong4 |
1. China Jiliang University, Hangzhou, Zhejiang 310018, China;
2. Tsinghua University, Beijing 100084, China;
3. National Institute of Metrology, Beijing 100013, China;
4. College of Quality and Supervisor Technology, Hebei University, Baoding, Hebei 071002, China |
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Abstract A continuously adjustable high stable DC voltage reference based on subsurface Zener reference LTZ1000A is presented and PWM technique is adopted to output voltages between 0～10 V. With selecting high precise resistors and using appropriate measures to insulate and isolate,the short-time relative stability of 7 V output voltage provided by LTZ 1000 is 1.7×10-8.The voltage of 10 V is increased up by a network,composed by high precise resistors with the same temperature coefficient,and its short-time relative stability is 2.4×10-8. The voltage of 0~10 V generated by PWM technique and suitable DC-DC conversion-filter circuit are measured and the short term relative stabilities are about 10-7.
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[1] 冯占岭，胡衍瑞，张力力. 10伏电压标准及其量值传递[J]. 计量学报,1987,8(1): 42-45.
[2] Spreadbury P J. The Ultra-Zener-a portable replacement for the Weston cell[J]. Meas Sci Technol,1990,4: 687-690.
[3] Field B M. An improved transportable DC voltage standard[J]. IEEE transactions on instrumentation and measurement,1989,38(2): 324-329.
[4] 胡毅飞，周庚如，王路，等. 10V直流电压标准研究[J]. 计量学报,1999,21(3): 205-208.
[5] 宋强，刘文华，严干贵，等. 大容量PWM电压源逆变器的LC滤波器设计[J]. 清华大学学报,2003,43(3): 345-348.
[6] 夏廷君. 有源电力滤波装置中LC滤波器改进设计的研究[D].长春: 哈尔滨理工大学,2010.
[7] 王农，韩冰，贺青，等.普朗克常数h测定系统中磁场线圈稳流源研究[J].电测与仪表,2011,48(547): 1-6. |
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2014, Vol. 35 
