5SHY35L4520 ABB 非對(duì)稱晶閘管IGCT

5SHY35L4520 ABB 非對(duì)稱晶閘管IGCT

集成門極換流晶閘管(integrated gate commutated thyristor,IGCT)關(guān)斷暫態(tài)時(shí),其電流迅速由陰極換向到門極,且IGCT反并聯(lián)二極管因承受正向偏壓而導(dǎo)通,故IGCT關(guān)斷暫態(tài)特性受其門極驅(qū)動(dòng)關(guān)斷電路及其反并聯(lián)二極管運(yùn)行特性影響?；贗GCT關(guān)斷暫態(tài)換流機(jī)制及反并聯(lián)二極管的工作原理,提出IGCT關(guān)斷暫態(tài)時(shí)門極換流晶閘管(gate commutated thyristor,GCT)、驅(qū)動(dòng)電路與反并聯(lián)二極管所構(gòu)成續(xù)流回路的等效電路,詳細(xì)分析反并聯(lián)二極管不同工況時(shí)等效電路結(jié)構(gòu)及其運(yùn)行特性的變化。結(jié)合IGCT關(guān)斷暫態(tài)其端電壓及等效電路各支路電流的實(shí)驗(yàn)結(jié)果,給出IGCT驅(qū)動(dòng)關(guān)斷電路及續(xù)流回路參數(shù)的提取方法。通過(guò)不同箝位電壓與關(guān)斷電流時(shí)實(shí)驗(yàn)結(jié)果與理論分析的對(duì)比,并考慮參數(shù)提取結(jié)果的一致性,充分證明等效電路與理論分析的正確性及參數(shù)提取方法的有效性。

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描述

IGCT關(guān)斷暫態(tài)過(guò)程較為復(fù)雜,涉及門極驅(qū)動(dòng)關(guān)斷電路完成電流換向及反并聯(lián)二極管續(xù)流回路導(dǎo)通等情況。驅(qū)動(dòng)電路通過(guò)端子G逐步抽出N基區(qū)過(guò)剩載流子的同時(shí),IGCT端電壓隨之發(fā)生變化,進(jìn)而導(dǎo)致反并聯(lián)二極管運(yùn)行狀態(tài)的改變。該部分結(jié)合上述狀態(tài)變化,詳細(xì)闡述IGCT關(guān)斷暫態(tài)驅(qū)動(dòng)電路及續(xù)流回路運(yùn)行特性。

根據(jù)IGCT關(guān)斷電流下降過(guò)程,可將關(guān)斷暫態(tài)分為3個(gè)階段：1）存儲(chǔ)階段：驅(qū)動(dòng)電流通過(guò)門極端子從P基區(qū)抽出過(guò)剩載流子,使內(nèi)建PNP與NPN退出飽和狀態(tài);2）下降階段：N基區(qū)承壓逐漸增大并趨于穩(wěn)定,區(qū)域內(nèi)幾乎全部過(guò)剩載流子被掃除;3）拖尾階段：N基區(qū)殘存過(guò)剩載流子通過(guò)復(fù)合作用被消除的過(guò)程。IGCT關(guān)斷暫態(tài)及斷態(tài)時(shí),門極驅(qū)動(dòng)關(guān)斷電路運(yùn)行狀態(tài)如圖3所示,其中：VGU為關(guān)斷暫態(tài)驅(qū)動(dòng)電源;Ln為門極驅(qū)動(dòng)關(guān)斷電路集成電感;S為關(guān)斷電路開關(guān)。由圖3可知,關(guān)斷暫態(tài)時(shí)S閉合,驅(qū)動(dòng)關(guān)斷電路進(jìn)入工作狀態(tài),反向VGU施加于內(nèi)建NPN發(fā)射結(jié)兩端,使發(fā)射結(jié)反向阻斷

5SHY35L4520 5SXE10-0181 AC10272001R0101

The transient process of IGCT shutdown is relatively complex, involving gate driven shutdown circuits to complete current commutation and reverse parallel diode freewheeling circuit conduction. As the driving circuit gradually extracts excess carriers from the N base region through terminal G, the voltage at the IGCT terminal changes, resulting in a change in the operating state of the anti parallel diode. This section provides a detailed explanation of the IGCT shutdown transient driving circuit and the operating characteristics of the freewheeling circuit based on the above state changes.
According to the process of IGCT shutdown current decrease, the shutdown transient can be divided into three stages: 1) storage stage: the driving current extracts excess carriers from the P-base region through the gate terminal, causing the built-in PNP and NPN to exit the saturation state; 2) Descending stage: The pressure in the N-base region gradually increases and tends to stabilize, and almost all excess carriers in the region are swept away; 3) Trailing stage: The process of residual excess carriers in the N base region being eliminated through recombination. During the IGCT shutdown transient and shutdown state, the operating status of the gate drive shutdown circuit is shown in Figure 3, where VGU represents the shutdown transient driving power supply; Ln is the integrated inductor of the gate driven shutdown circuit; S is the shut-off circuit switch. From Figure 3, it can be seen that during the transient shutdown, S is closed, driving the shutdown circuit to enter the working state. Reverse VGU is applied to both ends of the built-in NPN transmission junction, causing the transmission junction to be blocked in the opposite direction

ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181、5SHY35L4520、5SHY5045L0020、ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181、5SHY35L4520、5SHY5045L0020ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181

5SHY35L4520、5SHY5045L0020ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181、pm511v16、5SHY35L4520、5SHY5045L0020ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181、5SHY35L4520、5SHY5045L0020 ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181，5SHY35L4520、5SHY5045L0020ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181、5SHY35L4520、5SHY5045L0020ABB IGCT模塊5SHY4045L0004/5SHY6545L0001 AC10272001R0101 5SXE10-0181、5SHY35L4520、5SHY5045L0020

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