Design Of Drive Force Of Electromagnetic Repulsion Mechanism Based On Reaction Force Coordination

Electromagnetic repulsion mechanism is a new operating mechanism. It has some new features, such as simple structure, short mechanical delay, short opening and closing time, which are better than the traditional operating mechanisms. Therefore, it has important applications in situations where fast action is needed, and it has become one of the focuses in the switch field.The electromagnetic repulsion mechanism differs greatly with the traditional operating mechanism in structure. The structural difference will inevitably result in changes on the reaction force characteristic, which will bring difference in the design of driving force. In terms of the requirements of operating mechanism, good fitness of its output characteristics and load characteristics is the fundamental guarantee of a switch's operational reliability, and guaranteed output characteristics to match the characteristics of the reaction force is the basic requirement of operating mechanism. The design and optimization of traditional operating mechanisms are based on their load characteristics. In this paper, the electromagnetic repulsion mechanism was the object of research, and its electromagnetic driving force from the angle of matching the reaction force characteristics was studied.Firstly, this paper analyzed the structure and working principle of the electromagnetic repulsion mechanism, and acquired the reaction force characteristics of it. The open and close electromagnetic driving force of the electromagnetic repulsion mechanism based on drive requirements and reaction force characteristics were designed. The electromagnetic driving force in different motion characteristics were obtained, and their features were summarized in the paper.Performance of the high-speed buffer device is one of the conditions for designing the open driving force of the electromagnetic repulsion mechanism, and the limit of buffering capacity restricts the choice of open driving force. This paper studied the high-speed buffer device which is suitable for the electromagnetic repulsion mechanism, the high-speed buffer device's performance not only ensured the kinetic energy of the switch can be effectively buffered, but also keep the moving guide bar in the closing position without rebound. The limit of buffering capacity of the high-speed buffer device was obtained through experimental method.In view of the electromagnetic driver design results of the electromagnetic repulsion mechanism, this paper acquired the electromagnetic driving force of the electromagnetic repulsion mechanism by single pulse discharge which is easiest to implement, and obtained the driving characteristics of single pulse switching electromagnetic driving force. The open driving force was optimized through the analysis of the movement characteristics. Multiple pulse electromagnetic drive way was put forward, analyzed the driving characteristics of the multiple pulse and single pulse driving force, and got the advantages and disadvantages of the two drive modes for single pulse and multiple pulse electromagnetic driving force.This paper used the single pulse electromagnetic driver results of the electromagnetic repulsion mechanism to implement the drive design of ultra-fast mechanical switch of 40 kV forced zero high voltage direct current circuit breaker, and acquired the local optimal design of 40 kV ultra-fast mechanical switch through the single pulse open electromagnetic driver optimization method.