BGR-022365模塊,ADVANTEST使用速度
降壓電路經(jīng)LED接入零線(xiàn)和火線(xiàn)，由于LED內部等效一個(gè)電容并聯(lián)一個(gè)電阻負載，相當于一個(gè)電阻串聯(lián)在母線(xiàn)上，降壓電路正常工作給后端控制系統供電。在關(guān)態(tài)時(shí)，需要重點(diǎn)關(guān)注LED是否存在“鬼火”現象（LED微亮）。
“鬼火”現象出現的原因為：由于LED與降壓電路串聯(lián)在零火線(xiàn)之間，當降壓電路需要的輸入電流過(guò)大，則流進(jìn)LED的電流同樣增大，就會(huì )導致LED短暫工作，出現微亮現象。
BGR-022365模塊,ADVANTEST使用速度針對該問(wèn)題，市面上已有部分廠(chǎng)家能把單火線(xiàn)電源的待機功耗做到幾個(gè)毫瓦。參考金升陽(yáng)的非隔離LSF01-K5BxxSS系列，該產(chǎn)品結合外圍電路可滿(mǎn)足全球輸入電壓范圍（85-264VAC），在這輸入工作電壓范圍內能維持超低待機功耗，穩定輸出電壓5V、12V等，其待機功耗約為5.2mW
圖片要點(diǎn)二、關(guān)注單火線(xiàn)電源應用電路的功耗問(wèn)題
如何平衡取電能力和不能頻閃，常見(jiàn)的解決方式為有可控硅和繼電器兩種方案。由于可控硅發(fā)熱問(wèn)題，繼電器方案目前在市面上較為主流，以下主要講解繼電器方案的工作原理。其開(kāi)態(tài)的具體工作原理如圖8所示。
1、零火線(xiàn)兩端電壓為正弦波，當交流電在正半波時(shí)，由于二極管D2的單向導電性和MOS管Q1斷開(kāi)，此時(shí)的電流流經(jīng)二極管D1、儲能和控制電路，使儲能和控制電路工作，提供穩定輸出電壓給后端控制系統工作，同時(shí)在某個(gè)設定電壓時(shí)控制MOS管Q1導通。故交流電在正半波時(shí)，只有一小部分能量?jì)Υ嫦聛?lái)給后端控制系統供電，剩余能量通過(guò)MOS管Q1給LED供電。
2、當交流電在負半波時(shí)，此時(shí)電流通過(guò)LED和二極管D2形成回路，給LED供電。單火線(xiàn)電源應用時(shí)應注意兩點(diǎn)：
1、LED燈功率不宜過(guò)小，若LED燈功率過(guò)小，會(huì )導致開(kāi)態(tài)取電電路無(wú)法儲存能量給后級電路供電，能使用的最小LED燈功率需要結合不同的電路和器件參數決定；
2、控制電路工作功耗不宜過(guò)大，若控制電路工作功耗過(guò)大，則會(huì )導致關(guān)態(tài)出現“鬼火”現象和開(kāi)態(tài)取電電路異常，由于開(kāi)態(tài)取電電路在參數確定的情況下，單個(gè)周期儲存的能量有限，無(wú)法提供充足的能量給工作功耗過(guò)大的控制電路；若實(shí)際應用需要工作功耗大的控制電路，則需要另外搭建電路解決該問(wèn)題。
單火線(xiàn)的可靠性、體積、應用電路成為重點(diǎn)關(guān)注要素
recommends using powerful cam profile function to upgrade each rotation through Kobelco special software. The integrated motion solution realizes the positioning cam and the continuous cam profile change on the flywheel.
By implementing the Rockwell Automation integrated architecture control solution, Kobelco reduced cabling time by 20%, installation time by 30% and development time by 40%. The company has achieved high efficiency in integration and startup, load control and grinding control.
For example, rslogix 5000 software is very easy to learn and use. Its modular program architecture and clear motion processing function make it easy to manage applications, repeat practicality, debug and diagnose, thus accelerating the supply speed of equipment. In addition, Rockwell automatic positioning torque solution improves the benchmark performance by 60% (load control change +/-18n), and it can be completed in 3 seconds. Moreover, for grinding control, the positioning cam brings high accuracy grinding, which reduces the overall grinding time compared with the previous method. The controller, remote IO with dh+ bus, has been phased out because PLC5 is an early product of ab. its spare parts are difficult to buy and the price is high, which increases the maintenance cost of the equipment.
