磁继电器开断过程中的电弧放电和浪涌抑制

Electrical Contacts - 2007 Proceedings of the 53rd IEEE Holm Conference on Electrical Contacts Pub Date : 2007-09-24 DOI:10.1109/HOLM.2007.4318230

H. Honma, S. Kimura, K. Shoji, N. Wakatsuki

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引用次数: 7

摘要

在带感性负载的开关电路中，开断过程中产生的电弧放电和浪涌是一个大问题。我们提出了一种利用及时控制的暂态电流开关和并联在励磁开关上的电容器来抑制电弧放电的电方法。在本文中，我们提出了一个改进方案。我们用两个电容器替换了这个电容器。一是抑制引弧，二是抑制浪涌。通过对继电器触点动作的电测量，数值推导出适当的电容值和串联电阻。抑制引弧的电容与负载电感无关，只与负载电阻有关。然而，抑制浪涌的电容及其串联电阻取决于负载电感及其电阻。对于传统磁继电器(HH62P)带感性负载(84 mH)的断动(50 V/8 A)， 1muF电容器可以抑制引弧，100 muF电容器和8Omega电阻足以抑制浪涌。实验证实，该装置不引弧，浪涌控制在30v以下。

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Arc discharge and surge suppression during a breaking operation of a magnetic relay

In a switching circuit with an inductive load, arc discharge and surge generated during a breaking operation are big problems. We proposed an electric method for arc discharge suppression using a timely controlled transient current switch and a capacitor arranged in parallel to the energizing switch. In this paper, we propose an improvement. We replaced the capacitor with two capacitors. One to suppress arc ignition and the other is to suppress surge. Using electrical measurements of the relay contact operation, adequate capacitance values and series resistance were derived numerically. The capacitance to suppress arc ignition does not depend on load inductance but only on load resistance. However, the capacitance and its series resistance to suppress surge depend on the load inductance and its resistance. For the break operation (50 V/8 A) of a conventional magnetic relay (HH62P) with an inductive load (84 mH), a 1muF capacitor can suppress arc ignition and a 100 muF capacitor and a resistance of 8Omega is sufficient to suppress surge. No arc ignition and surge controlled to less than 30 V were confirmed experimentally.

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Electrical Contacts - 2007 Proceedings of the 53rd IEEE Holm Conference on Electrical Contacts

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