描述

IGCT集IGBT（絕緣門(mén)極雙極性晶體管）的高速開(kāi)關(guān)特性和GTO（門(mén)極關(guān)斷晶閘管）的高阻斷電壓和低導(dǎo)通損耗特性于一體，一般觸發(fā)信號(hào)通過(guò)光纖傳輸?shù)絀GCT單元。在ACS6000的有緣整流單元的相模塊里，每相模塊由IGCT和續(xù)流二極管、鉗位電容、阻尼電阻組成，由獨(dú)立的門(mén)極供電單元GUSP為其提供能源。

IGBT模塊只是將功率器件部分封裝為模塊，IGBT模塊產(chǎn)品一般可以是單管、雙管（半橋）或6管（全橋），也有三電平12只管封裝為一個(gè)模塊。由于已經(jīng)封裝為模塊，是電絕緣的，安裝工藝簡(jiǎn)單；IGCT不具備這種優(yōu)勢(shì)，使系統(tǒng)的設(shè)計(jì)、安裝和維護(hù)復(fù)雜，絕緣與散熱之間的矛盾，使系統(tǒng)問(wèn)題較多。

IGBT小功率驅(qū)動(dòng)可以做在一起，大功率需要單獨(dú)的驅(qū)動(dòng)板。dsp是控制核心，還有外部io，內(nèi)部信號(hào)采集，處理，驅(qū)動(dòng)信號(hào)緩沖，驅(qū)動(dòng)信號(hào)隔離，放大，才能到IGBT的GE極。光纖隔離傳輸驅(qū)動(dòng)信號(hào)。

IGBT通斷頻率要高，但dv/dt就是通斷速度要低，有一定矛盾，只有速度足夠快，頻率才能足夠高。加吸收電路或者IGBT采取軟關(guān)斷，吸收電路是把有可能產(chǎn)生的10kv/us吸收，軟關(guān)斷是指降低開(kāi)關(guān)的關(guān)斷速度，人為造成關(guān)斷拖尾，好處是減小dv/dt，壞處是加大了IGBT損耗，所以要細(xì)致調(diào)整關(guān)斷時(shí)間。IGBT驅(qū)動(dòng)電路關(guān)斷IGBT時(shí)在GE處施加負(fù)電壓（開(kāi)通施加正電壓），在微型電容處串微型電阻，這樣GE電壓下降就會(huì)變慢， 從而減小dv/dt。

IGCT integrates the high-speed switching characteristics of IGBT (Insulated Gate Bipolar Transistor) and the high blocking voltage and low conduction loss characteristics of GTO (Gate Off Thyristor). Generally, the trigger signal is transmitted to the IGCT unit through optical fiber. In the phase module of the edge rectifier unit of ACS6000, each phase module is composed of IGCT, freewheeling diode, clamp capacitor, and damping resistor, and is powered by an independent gate power supply unit GUSP.
IGBT modules only encapsulate power devices as modules. IGBT module products can generally be single transistor, double transistor (half bridge), or 6-transistor (full bridge), and there are also three-level 12 transistors packaged as one module. Due to being encapsulated as a module and electrically insulated, the installation process is simple; IGCT does not have this advantage, making the design, installation, and maintenance of the system complex. The contradiction between insulation and heat dissipation leads to more system problems.
IGBT low-power drives can be made together, while high-power drives require separate drive boards. DSP is the control core, as well as external IO, internal signal acquisition, processing, driver signal buffering, driver signal isolation, amplification, in order to reach the GE pole of IGBT. Fiber optic isolation transmission drive signal.
The on/off frequency of IGBT should be high, but dv/dt means the on/off speed should be low, which has a certain contradiction. Only when the speed is fast enough can the frequency be high enough. Adding an absorption circuit or IGBT adopts soft shutdown. The absorption circuit absorbs the potential 10kv/us that may be generated. Soft shutdown refers to reducing the closing speed of the switch, causing manual shutdown delay. The advantage is to reduce dv/dt, while the disadvantage is to increase IGBT loss, so the shutdown time needs to be carefully adjusted. When the IGBT driver circuit turns off the IGBT, a negative voltage is applied at the GE (positive voltage is applied when turned on), and a micro resistor is connected at the micro capacitor. This slows down the voltage drop of the GE and reduces dv/dt.

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公司介紹：
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Company Introduction:
Chengdu Sunshine Xihe Co., Ltd. specializes in one-stop procurement consulting for imported industrial spare parts, offering original equipment and professional discontinued parts services. We are committed to providing efficient and reliable automation solutions for our customers. Customer support fast responseThe network of partners spans all continentsGlobal partner networkAlways achieve more delivery, be it parts, service or speed



始終實(shí)現(xiàn)更多的交付，無(wú)論是零件、服務(wù)還是速度