Optimal Design and Dynamic Analysis of a Spring-Actuated Cam-Linkage Mechanism in a Vacuum Circuit Breaker

This study attempted to establish an optimal design and perform dynamic analysis for a spring-actuated cam-linkage composite mechanism in rated 12 kV, 25 kA vacuum circuit breaker (VCB). The of the VCB involves two steps: first step stiffness closing springs cam profile, based on three-order polynomial motion curve follower; second four-bar linkage. To minimize surplus work operating mechanism, overall difference between general output force resistant during operation was adopted as objective function be minimized. Furthermore, differential evolution algorithm with golden ratio (DE-gr), efficient accuracy metaheuristic algorithm, employed optimization method. conducted using MATLAB-coded program verified by multibody software MSC-ADAMS. revealed that can considerably decrease average velocity movable contact Hertz stress surface roller follower.