Contact bounce analysis method for multi-flexible electric appliance contact spring system

Abstract

The invention discloses a contact bounce analysis method for a multi-flexible electric appliance contact spring system. The method comprises the following steps: step 1, establishing an equivalent collision kinetic model of the electric appliance contact spring system; step 2, constructing a relay kinematics and collision dynamics differential equation; step 3, establishing a movable contact spring displacement equation of a relay; step 4, completing a matrix form of a kinetic equation of the relay; step 5, solving the matrix form of the kinetic equation of the relay to obtain the numerical solution of the generalized coordinate g to acquire the lateral displacement of the movable contact spring; and step 6, analyzing dynamics and collision bounce characteristics of the electric appliancecontact spring system by solving a change rule curve of the transverse displacement of a reed over time under different conditions. The dynamic process of the reed is simulated in a simple and effective mode, the contact bounce parameters are collected, and compared with a traditional contact system dynamics analysis method with a rigid body as the assumed condition, the calculation precision is better.

Description

technical field [0001] The invention relates to an analysis method for describing the bouncing behavior of an electric appliance, in particular to a method capable of effectively simulating the bouncing characteristics of the reed of the electric appliance contact spring system. Background technique [0002] For electrical appliances, phenomena such as poor contact and frequent separation of closed contacts greatly threaten the safety and stability of the power system. With the improvement of the reliability requirements of electrical appliances, more stringent requirements are put forward for their contact performance. In order to avoid contact faults and make electrical appliances have higher reliability and longer service life, it is necessary to reduce the contact bounce amplitude and bounce time. [0003] During a brief macro-collision process, due to the interaction between the elastic vibration of the reed structure and the collision, it is very likely that multiple ...

AI Technical Summary

Problems solved by technology

However, since the equation of the rigid-flexible coupling collision contact system contains strong nonlinear terms, the numerical behavior is very complex, which makes the dynamic analysis and prediction of contact bounce in this case very difficult.

[0004] At present, the reeds of electrical appliances will deform during operation. The traditional contact system dynamics analysis method based on the assumption of a rigid body obviously cannot meet the calculation requirements and analysis accuracy.

In addition, due to the extremely complex and time-consuming structural design of traditional electrical contact bounce experiments, and the mechanism of contact bounce cannot be clearly revealed

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