3BHB004027R0101高壓變頻模塊,GVC700AE01說(shuō)明書(shū)文檔
輸入電壓可以有+25%/-30%的變化，在100ms內(nèi)下降至標(biāo)稱(chēng)電壓的60%或上升至140%，但不可以有 “功能偏差”， 或是在一秒內(nèi)，輸入電壓從標(biāo)稱(chēng)電壓的125%升至140%而導(dǎo)致性能下降的情況。為了應(yīng)對(duì)這些變化，110V系統(tǒng)的DC/DC轉(zhuǎn)換器通常必須在43VDC至160VDC之間工作。
3BHB004027R0101高壓變頻模塊,GVC700AE01說(shuō)明書(shū)文檔系統(tǒng)電源軌上也會(huì)出現(xiàn)EN 61000-4-x標(biāo)準(zhǔn)中定義的快速瞬態(tài)過(guò)電壓，簡(jiǎn)單的抑制器和LC濾波器就可以減弱這些過(guò)電壓，但也有可能造成徹底斷電。EN 50155定義了S1和S2兩種斷電等級(jí)，最嚴(yán)重的是標(biāo)稱(chēng)輸入電壓中斷10ms，但不會(huì)對(duì)電源性能造成影響。對(duì)于某些設(shè)備來(lái)說(shuō)，電源轉(zhuǎn)換（Class C2）造成的中斷可長(zhǎng)達(dá)30ms。為了解決這個(gè)問(wèn)題，常見(jiàn)的方法是在隔離串聯(lián)二極管之后斷電維持電容，該二極管還可以提供反極性保護(hù)，這也是標(biāo)準(zhǔn)中的另一項(xiàng)要求。
應(yīng)用范例如圖1所示，其中，風(fēng)扇由車(chē)廂溫度傳感器激活，并通過(guò)WLAN發(fā)出溫度和狀態(tài)信號(hào)。圖示中RECOM 8W DC/DC轉(zhuǎn)換器的輸入范圍為43V至160V，可為傳感器電路提供5V隔離的穩(wěn)壓電源軌。轉(zhuǎn)換器尺寸緊湊，僅32 x 20 x 10mm。RECOM DC/DC轉(zhuǎn)換器符合EN50121-3-2對(duì)鐵路車(chē)輛EMC標(biāo)準(zhǔn)的要求，除此之外，延長(zhǎng)的保持時(shí)間、反極性保護(hù)以及EMI濾波器的可選性，讓轉(zhuǎn)換器對(duì)瞬態(tài)和低頻傳導(dǎo)干擾具有較高的抵抗力。鐵路用DC/DC轉(zhuǎn)換器有時(shí)需要符合UK RIA 12標(biāo)準(zhǔn)，該標(biāo)準(zhǔn)定義了110V系統(tǒng)在20ms內(nèi)最高浪涌電壓可達(dá)385V。但是在電源輸入阻抗僅為0.2歐姆的情況下，用瞬態(tài)電壓抑制器抑制輸入電壓會(huì)消耗過(guò)多電能。RECOM的解決方案是使用RSPxx-168前端瞬態(tài)電壓抑制器（圖2），將浪涌電壓降至DC/DC轉(zhuǎn)換器輸入電壓范圍內(nèi)的最大值，為DC/DC轉(zhuǎn)換器提供浪涌保護(hù)。RECOM提供20W、150W和300W三種瞬態(tài)保護(hù)模塊可供選擇。集中式鐵路車(chē)輛系統(tǒng)和軌道裝置也需要更高功率的轉(zhuǎn)換器。RECOM的RPxxx-RW和RPxxxRUW系列“磚”型DC/DC轉(zhuǎn)換器很受市場(chǎng)歡迎，模塊具有12:1輸入電壓范圍，涵蓋了從24VDC至110VDC的所有鐵路標(biāo)準(zhǔn)輸入電壓，并且涵蓋了輸入浪涌和欠壓。DIN導(dǎo)軌型也是常見(jiàn)應(yīng)用，例如RECOM的姊妹公司Power Control Systems（PCS）提供堅(jiān)固耐用的120W SQ120模塊，輸入為110VDC，符合EN50155標(biāo)準(zhǔn)。
After the capacity expansion of the whole system, its performance parameters will not be reduced;
6) The rated voltage is available in 400V and 690V, and the rated capacity can be combined arbitrarily from 200KVA to 3000kva;
7) It has strong overload capacity. In view of the possible reverse power and reactive power interaction at the moment of connecting the ship to the grid, through hardware design and software design, it can effectively suppress various impact conditions in the process of connecting the grid, so that the success rate of connecting the ship can reach 100%;
8) Automatic voltage stabilization function, when the power grid voltage fluctuates, through the internal PID closed-loop control, the output power grid does not fluctuate with the power grid fluctuation and does not change with the load fluctuation;
9) There are two ways to connect ships: active ship connection and passive ship connection, which are suitable for all kinds of ships' shore power needs;
10) The sb70p series shore power supply control system is customized and developed for the customer's needs of shore power supply to meet the power supply requirements of shore power supply system. In the field of building automation, the extensive use of power supply is often accompanied by strict technical requirements. The application environment of power supply in buildings is usually very bad. Thunderstorms can cause strong transients in power supply voltage, especially in high-rise and tower buildings. Therefore, the robust electrical design of power input converter is very important. In extreme cases, surge protectors are also used to protect the power input.
