This paper presents a novel electro-mechanical trimming process to improve the accuracy and performance of 100μΩ Manganin shunt resistors for use in current sensing applications such as smart energy meters. More specifically, the work focuses on the development of a precision trimming process to improve the resistance tolerance of the shunt resistors. A novel laboratory prototype of an automated concurrent trimming system is developed which combines the mechanical cutting process and electrical measurement system to remove controlled amounts of material from the Manganin shunt. Designs of experiments are conducted in order to find the optimum feed rate and cutting speed for the trimming process. The impact of cutting speed between 250 to 2500 m/min and feed rate between 1 to 15 mm/min was investigated. The optimum speed is measured at 1750 m/min with the feed rate at 1 mm/min. The results obtained can be used to inform production processes for large scale manufacture of precision shunt resistors.
|Title of host publication||Proceedings of the 2nd International Conference on Advances in Mechanical Engineering Istanbul 2016|
|Place of Publication||Istanbul|
|Publisher||Yildiz Technical University|
|Number of pages||969|
|Publication status||Published - 13 May 2016|