Development of a Wide-range AC Kelvin BridgeHUANG Lu , ZHANG Zhong-hua , ZHAO Wei , LI Zheng-kun1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; 2. National Institute of Metrology, Beijing 100013, China; 3. School of Electrical Engineering, Xi＇an Jiaotong University, Xi＇an, Shaanxi 710049, ChinaAbstract:For the accurate t and calibration of the AC standard resistors in the resistance range from 1 Ω to 10 kΩ, a new type of Kelvin bridge operating at the frequency range from DC to 100 kHz is designed, and a measuring method of substitution is developed. The experimental results of 100 Ω and 1 kΩ standard resistor prove that this bridge takes some advantages, such as high accuracy, simplicity of operating and wide working frequency range, which has already met the specification requirements of the Subject of ＂The National AC Resistance Standard＂.[著者文摘]