基于PLC和AD轉換的穩流和續流實現
王建新，吳獻東，黃云樞
溫州出入境檢驗檢疫局 低壓電器實驗室，浙江 溫州 325604
摘要：針對低壓電器特性檢測的電源需求特點，提出了可編程序控制器PLC配合AD轉換實現穩流的一種控制方法，并給出了一種實現續流的設計方案，介紹了該方案的硬件組成、預檢調壓器動作特性、運行阻抗續流的計算以及預檢調壓器特性參數方式的優缺點。實際運行情況表明，該方式結構簡單、運行穩定，有利于降低成本和易于維護。
關鍵詞：低壓電器；特性檢測；可編程序控制器；穩流；續流
中圖分類號：TM571.6+1 文獻標識碼：B 文章編號：1007-3175(2013)07-0047-03
Realization of Stabilized Current and Follow Current Based on Programmable Logic Controller and Analog Digital Conversion
WANG Jian-xin, WU Xian-dong, HUANG Yun-shu
Low-Voltage Apparatus Testing Lab, Wenzhou Entry—Exit Inspection and Quarantine Bureau, Wenzhou 325604, China
Abstract: Considering the requirements of characteristic test of low-voltage electrical apparatus, this paper presented a kind of control method using the programmable logic controller (PLC) and analog digital (AD) conversion module to stabilize current and gave a kind of design plan to realize follow current. Introduction was made to the hardware, operating characteristic of pretest booster, calculation of follow current of operating impedance, and advantages and disadvantages of characteristic parameter mode of pretest booster. Actual operation shows that the method has the advantages of simple structure, stable operation, low cost and easy maintenance.
Key words: low-voltage electrical apparatus; characteristic test; programmable logic controller; stabilized current; follow current
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