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Simulation and stability analysis of spring operating mechanism with clearance for high voltage circuit breakers

Spring Operating Mechanism (SOM) is a dynamic mechanical system to open and close high voltage circuit breaker in electric power controlling system. The dynamic characteristics of SOM are short operating time and high instantaneous speed in the process of working, which present strong nonlinear features. In order to save time and money for a new design and analysis of SOM, the dynamic model with clearance considering the contact and collision under ADAMS program is established. The result indicated that the existence of the clearance joints causes hysteresis and impact effects on velocity and acceleration of the mechanism compared to the mechanism without clearance.