5SHY35L4503 ABB 可控硅整流器

可控硅整流器是一種常用的電力半導體電子器件,具有控制開關數(shù)千瓦乃至兆瓦級電功率的能力.從結構上說,它是 一種反向截止三極管型的閘流晶體管,由三個PN結(PN-PN四層)構成.器件的外引線有陰極、陽極、控制極三個電極,典型大電流可控硅整流器的示意剖面見圖.器件的反向特性(陽極接負)和PN結二極管的反向特性相似;其正向特性,在 一定范圍內(nèi)器件處于阻抗很高的關閉狀態(tài)(正向阻斷態(tài),即伏安特性一象限中虛線下的實線部分).當正向瞬間電壓大于轉折電壓時,器件迅速轉變到低電壓大電流的通導狀態(tài)

分類:

描述

可控硅整流器:是一種以晶閘管(電力電子功率器件)為基礎,以智能數(shù)字控制電路為核心的電源功率控制電器。具有效率高、無機械噪聲和磨損、響應速度快、體積小、重量輕等諸多優(yōu)點。

通常用雙三極管來描述可控硅的四層結構,看成一NPN和PNP晶體管的互聯(lián). 若兩晶體管的共基極電流放大系數(shù)分別為α1和α2(均為工作狀態(tài)的函數(shù)),導通的必要條件是α12?1.阻斷狀態(tài)下, 兩晶體管的電流放大系數(shù)均很小;若在正向阻斷狀態(tài)下,于控制極注入一正向電流,則NPN管的電流放大系數(shù)α1迅速增大,并導致α2的增大,從而滿足導通條件
可控硅是一種極為重要的功率電子器件,可以以極小的控制功率控制兆瓦級的電力,常用于整流、開關、變頻、逆變等電路中. 高功率可控硅采用甚大面積的硅片,需封裝在帶散熱器的管殼中.

5SHY35L4503 3BHB004693R0001 3BHB004692R0002 5SXE01-0127

Thyristor rectifier: It is a power control appliance based on thyristors (power electronic power devices) and centered on intelligent digital control circuits. It has many advantages such as high efficiency, no mechanical noise and wear, fast response speed, small size, and light weight.
Usually, a dual transistor is used to describe the four layer structure of a thyristor, as an interconnection between an NPN and PNP transistor If the common base current amplification coefficients of two transistors are α 1 and α 2 (all functions of working state), the necessary condition for conduction is α 1+ α 2 ? 1. In the blocking state, the current amplification coefficient of both transistors is very small; If a forward current is injected into the control electrode in a forward blocking state, the current amplification coefficient of the NPN transistor α 1 rapidly increases and causes α Increase by 2 to meet the conduction condition
Thyristor is an extremely important power electronic device that can control megawatt level power with minimal control power. It is commonly used in circuits such as rectification, switching, frequency conversion, and inverter High power thyristor uses a large area of silicon wafers and needs to be packaged in a shell with a heat sink

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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



始終實現(xiàn)更多的交付,無論是零件、服務還是速度