151X1230BR02SA02| IGBT 模塊|用于風(fēng)力渦輪機(jī)的電氣系統(tǒng)中|
151X1230BR02SA02 是一種轉(zhuǎn)子側(cè) IGBT 模塊,主要用于風(fēng)力渦輪機(jī)的電氣系統(tǒng)中。以下是關(guān)于其工作原理的詳細(xì)解釋:
基本結(jié)構(gòu):IGBT(絕緣柵雙極晶體管)模塊結(jié)合了 MOSFET 和雙極晶體管的優(yōu)點。它具有三個引腳:柵極(G)、發(fā)射極(E)和集電極(C)。柵極與 MOSFET 的柵極相同,集電極和發(fā)射極與雙極晶體管相同。
工作原理:
導(dǎo)通狀態(tài):當(dāng)向柵極施加正電壓時,N 溝道 MOSFET 導(dǎo)通,這會使基極電流流過 PNP 晶體管,最終使 PNP 晶體管導(dǎo)通,從而使集電極電流從集電極流向發(fā)射極。
截止?fàn)顟B(tài):當(dāng)柵極和發(fā)射極之間的電壓為零或負(fù)電壓時,MOSFET 截止,切斷 PNP 晶體管基極電流的供給,使得晶體管截止。
內(nèi)部結(jié)構(gòu):IGBT 的內(nèi)部結(jié)構(gòu)是一個四層半導(dǎo)體器件,通過組合 PNP 和 NPN 晶體管來實現(xiàn) PNPN 排列。漂移區(qū)的厚度決定了 IGBT 的電壓阻斷能力。
等效電路:IGBT 的等效電路由 MOS 管和 PNP 晶體管組成,考慮了 n- 漂移區(qū)提供的電阻。IGBT 的確切等效電路包括 MOS 柵極的晶閘管和 PNP 晶體管。
開關(guān)特性:IGBT 是電壓控制器件,因此它只需要一個很小的電壓到柵極即可保持導(dǎo)通狀態(tài)。IGBT 只能在從集電極到發(fā)射極的正向切換電流。
應(yīng)用場景:IGBT 模塊主要用于變頻器逆變和其他逆變電路,將直流電壓逆變成頻率可調(diào)的交流電。它在高電壓應(yīng)用中表現(xiàn)出色,導(dǎo)通電阻低,開關(guān)速度快。
熱管理:IGBT 模塊在工作時會產(chǎn)生熱量,因此需要良好的散熱設(shè)計。模塊的熱阻抗和熱循環(huán)對其可靠性有重要影響。
The 151X1230BR02SA02 is a rotor-side IGBT module mainly used in the electrical system of wind turbines. Here's a detailed explanation of how it works:
Basic structure: IGBT (insulated gate bipolar transistor) module combines the advantages of MOSFET and bipolar transistor. It has three pins: grid (G), emitter (E), and collector (C). The gate is the same as the gate of a MOSFET, and the collector and emitter are the same as that of a bipolar transistor.
How it works:
On-state: When a positive voltage is applied to the gate, the n-channel MOSFET is on, which causes the base current to flow through the PNP transistor and ultimately the PNP transistor to be on, thereby causing the collector current to flow from the collector to the emitter.
Cut-off state: When the voltage between the gate and the emitter is zero or negative voltage, the MOSFET cut-off cuts off the supply of base current to the PNP transistor, making the transistor cut-off.
Internal structure: The internal structure of the IGBT is a four-layer semiconductor device that achieves a PNPN arrangement by combining PNP and NPN transistors. The thickness of drift zone determines the voltage blocking ability of IGBT.
Equivalent circuit: The equivalent circuit of the IGBT consists of a MOS tube and a PNP transistor, taking into account the resistance provided by the n-drift region. The exact equivalent circuits of IGBT include MOS gate thyristors and PNP transistors.
Switching characteristics: The IGBT is a voltage control device, so it requires only a small voltage to the gate to maintain the on-state. Igbts can only switch current in the forward direction from the collector to the emitter.
Application scenario: The IGBT module is mainly used for inverter inverter and other inverter circuits to convert DC voltage into AC power with adjustable frequency. It performs well in high voltage applications with low on-resistance and fast switching speed.
Thermal management: IGBT modules generate heat when operating, so a good heat dissipation design is required. The thermal impedance and thermal cycle of a module have an important effect on its reliability.
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