LAUSR

High-power applications usually require suitable copper traces not only to drive a large amount of current but also for correct current sensing, without reducing the system’s performance. Several methods have been proposed to improve current sensing; however, not all provide simplicity and temperature stability. A novel approach for high current sensing is presented here. A summing network method with trace compensation is proposed. The proposed method provides a lower measurement error with respect to the most used methods. Conventional methods have a measurement error above 4.5%, which could significantly affect the system’s performance. The advantages of the aforementioned approach were verified in a 100-A experimental prototype, validating the feasibility of the proposed current-sensing improvement. A maximum measurement error of ±2.10% and a minimum measurement error of ±0.072% were obtained with 1- and 100-A current loads, respectively.