GFD233A處理單元卡件,3BHE022294R0101使用尺寸
并聯(lián)功能實現(xiàn)負載均衡改進后的MOSFET冗余模塊方案,甚至能夠使并聯(lián)模式達到更理想的熱均衡效果,從而能夠進一步延長產(chǎn)品的使用壽命。在此過程中,每臺電源之間的負載電流被均衡地分配。有兩種方法可以實現(xiàn)系統(tǒng)中的并聯(lián)功能:直接在電源本身集成并聯(lián)模式,或者將其集成在冗余模塊中。前者,即在電源的集成中,輸出電壓會被調(diào)整為:空載時比額定帶載時高出約4%。因此,只要設備間的空載電壓是相同的,電流就會自動分布。
GFD233A處理單元卡件,3BHE022294R0101使用尺寸如果一臺電源承擔了更多的電流,它的電壓就會自動降低,電流均衡得以保持。這樣的特性保證了在電流的分布上不存在功率損耗。后者,即在冗余模塊中集成并聯(lián)模式,MOSFET是以串聯(lián)形式連接的。為了實現(xiàn)兩通道(即兩臺電源)之間的電流均衡,它們將在通道的較高電壓下產(chǎn)生適當?shù)碾妷航怠T摲椒ㄒ部梢允箾]有集成并聯(lián)模式的電源作并聯(lián)使用。在普爾世冗余模塊YR20.245中,還附加了一項創(chuàng)新技術:熱插拔。這也是首次出現(xiàn)在冗余模塊上的熱插拔功能。“熱插拔”功能是指當系統(tǒng)正在工作時,更換一臺電源或者一個冗余模塊。要實現(xiàn)熱插拔,就需要關鍵連接處的端子具有防短路功能。更換故障設備時,只要按照既定順序操作,即可順利完成更換,無需切斷電源。而且,當更換完成,系統(tǒng)的冗余備份功能也能夠立即生效。這對于某些系統(tǒng)來說是非常重要功能,例如,在某些應用場合,即使是稍縱即逝的錯誤或故障,就足以威脅到人身安全或?qū)е聡乐亟?jīng)濟損失,這樣的情況下,熱插拔功能不可或缺。系統(tǒng)構成:整個系統(tǒng)大體上以電表采集系統(tǒng)為基礎,因此電表信息采集方面依然維持現(xiàn)狀——可通過采集器與集中器直接通訊,也可直接將數(shù)據(jù)傳輸?shù)郊衅髦?。熱力表、燃氣表、水表信息則通過接口轉(zhuǎn)換器進行協(xié)議轉(zhuǎn)換,然后再與集中器進行信息通訊傳輸。集中器將所有信息匯總后傳輸給主站系統(tǒng)。
其中,一個主站系統(tǒng)可以包含多個集中器,一個集中器可以統(tǒng)一管理和匯總多個采集器和接口轉(zhuǎn)換器。這樣的系統(tǒng)構成是目前四表合一最簡單的方案,對整個信息網(wǎng)絡的影響主要是增加了協(xié)議轉(zhuǎn)換的環(huán)節(jié)。
In order to protect the safety of personnel and equipment, the state clearly stipulates that the anti sports car device must be installed and used in the underground transportation inclined roadway of coal mines. In the process of inclined roadway transportation, the traction wire rope of the tramcar breaks, causing a sports car accident. The car barrier of the sports car protective device should not be opened, which plays the role of intercepting the runaway tramcar (car barrier).
The maximum energy of each set of barrier to intercept the runaway tramcar is certain. According to the rated barrier energy, inclined lane parameters and operating tramcar parameters, the number of barriers that need to be installed in a transportation inclined lane can be calculated theoretically. In fact, more than 6~10 sets of car barriers are generally installed and arranged in the inclined shaft transportation roadway of about 1km coal mine.
2. Process characteristics
The winch transportation control system is generally installed in the operation room of the ground or the upper flat car yard of the inclined lane under the shaft. In order to make the winch driver more objectively and accurately understand the operation of the tramcar, most coal mines now use the video transmission system to upload and display the monitoring video of each barrier passed by the tramcar in front of the winch driver.