Wave regulating resistor for regulating inpulse current wave form
A wave-tuning resistor and waveform adjustment technology, applied to non-adjustable metal resistors, resistors, circuits, etc., can solve problems such as fracture and weak mechanical strength
Inactive Publication Date: 2005-03-02
XI AN JIAOTONG UNIV
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Problems solved by technology
These two S-fold structures can operate reliably under the small impact current of 4 / 10μs and 8 / 20μs, but when the amplitude of the impact current is large, the mechanical strength of the connection of the resistance wire is relatively weak; The phenomenon of discharge occurs when the contact is not good, and the phenomenon of fracture often occurs under the action of strong pulse current
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[0010] specific implementation plan
[0011] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0012] see figure 1 , 2 , the present invention includes an upper electrode 1, a lower electrode 7, an insulating plate 6 and a resistance sheet 5 fixed between the upper and lower electrodes 1, 7, the resistance sheets 5 are separated by an insulating plate 6, and the wave-modulating resistance according to actual needs The size of the S-folded layers can be designed accordingly. In order to prevent the flashover between the layers of the resistance sheet, a groove 12 is provided on one side of the insulating plate 6, and the grooves 12 of the adjacent insulating plates 6 are arranged alternately. , so that the flashover distance is significantly increased, and the resistor sheet 5 is arranged on the insulating plate 6 in a double-folded S manner, and the insulating pla...
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The invention is an impact current waveform regulating resistance, including a top electrode, a bottom electrode and insulating boards and resistance plates all fixed between the two electrodes, there is a wiring terminal arranged on both the two electrodes, and its character: one side of the insulating board is made with a groove, the grooves of adjacent insulating boards are alternatively arranged, and the resistance plates are coiled in an S center-fold mode on the insulating boards. The resistance plates can adopts Ni-Cr and Fe-Cr alloy materials and are made in the S center-fold mode into a waveform regulating resistance for over-100 KA 4 / 10 and 8 / 20 mus impact current circuits, the resistance plates in all the layers are separated and fastened by the insulating boards (such as epoxy, teflon, etc.) and compacted by the insulating boards through connection terminals. And under the action of over-1000KA 4 / 10 and 8 / 20 mus pulse currents, it has no phenomena of current cutoff, discharge, etc.
Description
technical field [0001] The invention relates to a resistance element for shock current wave modulation, in particular to a wave modulation resistor for shock current waveform adjustment. Background technique [0002] The 4 / 10μs and 8 / 20μs impulse current waves are the test waveforms of lightning arrester valves, low-voltage zinc oxide varistors, and surge protectors specified by IEC and national standards. It is a double-exponent generated by RLC circuit simulation. current wave. In the RLC current, the role of the resistor R is to damp the formed current waveform, thereby generating an inrush current waveform of a specified duration. For 4 / 10μs, 8 / 20μs impulse current wave, the circuit works at R < 2 L / C Under conditions. In order to improve the efficiency of the circuit, it is hoped that the total capacitance of the circuit should be as large as possible, ...
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IPC IPC(8): H01C3/00H01C7/00
Inventor 陈景亮姚学玲刘东社刑菊仙赵志强赵铁军
Owner XI AN JIAOTONG UNIV