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| 一种脉宽调制的高稳定连续可调直流电压源 | |
| 引用本文： | 王刚,兰江,陈乐,李正坤,王农.一种脉宽调制的高稳定连续可调直流电压源[J].计量学报,2014,35(2):169-172. |
| 作者姓名： | 王刚 兰江 陈乐 李正坤 王农 |
| 作者单位： | 1. 中国计量学院,浙江 杭州 310018; 2. 清华大学,北京 100084; 3. 中国计量科学研究院,北京 100013; 4. 河北大学质量技术监督学院,河北 保定 071002 |
| 摘 要： | 介绍了一种以深埋齐纳电压基准元件LTZ1000A主电路为基础，结合脉宽调制技术实现的在0～10 V范围内连续可调的高稳定直流电压源。选用精密电阻并采用适当的保温与隔离措施，实现了电压基准主电路输出高稳定7 V电压，其短期稳定性达到1.7×10-8。利用具有相同温度系数和阻值的精密电阻组成比例升压电阻网络，使输出10 V电压的短期稳定性为2.4×10-8。同时利用脉宽调制并经DC-DC转换电路及滤波电路得到0～10 V的电压输出，短期稳定性可在10-7量级左右。 |
| 关 键 词： | 计量学 直流电压源 脉宽调制 连续可调 高稳定 |
A Consecutively Adjustable and High Stable DC Voltage Source with PWM Chopped Modulator |
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| WANG Gang,LAN Jiang,CHEN Le,LI Zheng-kun,WANG Nong.A Consecutively Adjustable and High Stable DC Voltage Source with PWM Chopped Modulator[J].Acta Metrologica Sinica,2014,35(2):169-172. | |
| Authors: | WANG Gang LAN Jiang CHEN Le LI Zheng-kun WANG Nong |
| Affiliation: | 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 |
| 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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