Bumping Behavior Simulation and Influencing Factors Analysis of Contact System in AC Contactor
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摘要: 为了揭示接触器触头系统弹跳动力学行为及影响因素，从振动角度提出了触头和铁心弹跳全过程分段振动微分方程并得到其数值解。基于ADAMS和ANSYS软件建立了交流接触器三维动态耦合仿真模型，并通过实验对仿真模型和数值解进行验证。实验结果表明，数值解能准确反映触头、铁心弹跳的全过程; 分析了触头曲率半径、线圈匝数对触头弹跳的影响，同时对动静触头分别为圆弧形-圆弧形、圆弧形-平面形、平面形-平面形3种配合情况进行了分析和比较。结果表明，当触头曲率为0.625时，触头弹跳时间最短。采用圆弧形与平面形触头配合可以大幅降低触头弹跳时间。Abstract: In order to reveal the bounce dynamics and influencing factors of the contactor system, the segmental vibration differential equations of the contact and core bounce are proposed from the vibration view, and its numerical solution is obtained. Based on ADAMS and ANSYS software, the 3D dynamic simulation model of AC contactor is established. The simulation model and numerical solution are verified by experiments. The experimental results show that the numerical solution can accurately reflect the whole process of contact and core bounce. Secondly, the influence of the arc-shaped contact and the contact spring parameters with different curvature radius on the bounce of the contact is analyzed. At the same time, the dynamic and static contacts are respectively arc-arc, arc-plane, and plane-plane. The three matching cases of the planar shape are analyzed and compared. The results show that when the contact curvature is 0.625, the contact bounce time is the shortest. The combination of the circular arc shape and the planar contact can greatly reduce the contact bounce time.
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Key words:
- AC contactor /
- contact bounce /
- dynamics model /
- coupled simulation
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表 1 实测触头弹跳参数与仿真弹跳参数对比
电流/A 仿真t 实测 相对误差/% t/ms N t/ms N 1.0 1.72 3 1.61 3 6.8 1.5 2.91 5 2.75 5 5.81 2.0 3.11 5 2.96 5 5.06 2.5 3.23 6 3.12 6 3.52 注：t为弹跳总时间；N为触头弹跳次数。 
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表 2 触头参数
触头编号 1 2 3 4 5 6 7 8 触头曲率 1 0.909 0.769 0.625 0.45 0.25 0.11 0 曲率半径/mm 1 1.1 1.3 1.6 2.2 4.0 9.0 ∞
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表 3 不同触头曲率下, 触头弹跳参数
动触头
(静触头)vc/(m·s-1) xmax/mm vr/(m·s-1) tbon/ms N 1(1) 1.19 0.481 2 1.65 3.6 6 2(2) 1.19 0.469 1 1.65 3.0 5 3(3) 1.19 0.324 4 1.65 2.3 4 4(4) 1.19 0.086 4 1.65 1.2 3 5(5) 1.19 0.726 6 1.65 3.4 7 6(6) 1.19 0.104 6 1.65 1.7 3 7(7) 1.19 0.182 7 1.65 2.9 4 8(8) 1.19 0.122 7 1.65 3.8 7
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表 4 静触头都为平面触头时, 触头弹跳参数
动触头 静触头 vc/(m·s-1) xmax/mm vr/(m·s-1) tbon/ms N 1 1.19 0.383 2 1.65 2.8 4 2 1.19 0.288 0 1.65 2.1 3 3 平 1.19 0.153 2 1.65 1.8 3 4 面 1.19 0.062 5 1.65 1.1 2 5 触 1.19 0.293 1 1.65 2.3 3 6 头 1.19 0.206 0 1.65 1.6 3 7 1.19 0.106 3 1.65 1.4 2 8 1.19 0.122 7 1.65 3.8 7
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