1746-IM16产品特点
IGBT保护电路
IGBT损坏的原因一般有过流、过压、过热3个方面。过压又分集电极发射极过压，门极发射极过压。在过流保护方面．很多生产厂家的技术资料表明：IGBT短时间大可承受两倍的额定电流．但是经常承受过电流会使器件过早老化。从图3可以发现。如门极驱动信号的幅值为15V，当IGBT通过450A的额定电流时，管压降大约为2.65V。根据这一特性，可以设计出IGBT过流保护电路。
图2 2QD15A17K-C典型保护电路
如图2所示为2QD15A17K-C典型的保护电路，按照该电路的结构，对参数的配置予以计算。由图可见，当IGBT关断时，VT1导通比较器同相端为0，此时150μA电流经过Rth在比较器反相端形成一个基准电位，此时比较器输出为低电平。当IGBT开通时，监测管关断，此时基准电位依然存在，1.4mA电流经过电容C延时后经过电阻Rm、VDM1、VDM2、IGBT后进入参考地。因而在比较器的同相端形成一个电位，其幅值由电阻Rm压降VRm，二极管VDM1、VDM2压降VD以及IGBT压降UCE共同决定，而VRm、VD为确定值，所以在比较器同相端的电位就决定于VCE。
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参数规格
CURRING DRYING CHAMBER CONTINOUS FLOW STAINLESS NEW
IC600LX680K GE FANUC IC600LX680 NEW - 1 YEAR GUARANTEE
1785-L60L SERIES A REV D ALLEN BRADLEY 1 YEAR WARRANTY
5250-LP3 SERIES B ---- 1 YEAR GUARANTEE
2711E-T14C6X SERIES E REV D - ONE YR GUARANTEE - USED
1757-ABRIO SERIES A F/W REV 2.3 ONE YR GUARANTEE - NIB
5370-CVIM2BC SERIES A, REV B, -------- 2 YEAR WARRANTY
5370-CVIM2 SERIES A, REV D, ----------- 1 YEAR WARRANTY
1785-LTR2 SERIES A F/W REV L -- 1 YEAR WARANTY
19" RACK ENCLOSURE CLIMATE CONTROLLED 30x24x24 NEW
90-2550-21361-532 BRAY PNEUMATIC ACTUATOR
CAREL HEATERSTEAM PART#: UR020HM10S 21 Kg/hr 460 VOLT
5370-CVIM2 SERIES A, REV B, ----------- 2 YEAR WARRANTY
1336-B050-EAG-FA2-L3-S1 --- USED --- 1 YEAR GUARANTEE
2711E-T14C6 SERIES G REV G - ONE YR GUARANTEE USED
5370-CVIM2BC SERIES A, REV B, -------- 1 YEAR WARRANTY
FANUC A16B-1221-0091/05C - USED - 1 YEAR WARANTY
SIEMENS 7ND4460-1GA16-1AA2 VIDEO GRAPHICS RECORDER
IC600BF944L GE FANUC ASCII/BASIC 12K - 1 YEAR WARANTY
5250-MLP2 A, A01 - 5250-LP A, A08 ---- 1 YEAR WARRANTY
FANUC A16B01600470 A16B-0160-0470 - 1 YEAR GUARANTEE
5250-MLP2 A, A01 - 5250-LP A, A07 ---- 1 YEAR WARRANTY
52-1926-126R McLean HOFFMAN AIR CONDITIONER 19K BTU NIB
NEMATRON IWS-1834-003 REVISION A BIOS/FIRM 4.3.52 --NIB
6180-FMIEGLDPHCZ ALLEN BRADLEY COMPUTER 1 YEAR GUARANTE
HI 2151/30WC-PM-B2-- HARDY INSTRUMENTS 1 YEAR WARRANTY
FANUC A16B01600542 A16B-0160-0542 - 1 YEAR WARRANTY
0-58724-70A 915K0100 REGULATOR - NIB - 1 YEAR WARRANTY
5130-RM 5130-MRM2 SERIES A -- 1 YEAR WARANTY
ABB ACH550-PD-031A-4 ONE YR GUARANTEE - 20 HP -- NEW
8111 TRICONEX EXPANSION CHASSIS - NIB 1 YEAR GUARANTEE
9101-2161 ELECTROCRAFT SERVO DEMO - 1 YR RERTURN POLICY
6ES5470-4UA13 SIEMENS NIB ------- 1 YEAR GUARANTEE
FANUC A16B01900080 A16B-0190-0080 - 1 YEAR GUARANTEE
FANUC A20B-0002-0942 A20B00020942 - 1 YEAR WARRANTY
1785-LTR SERIES B F/W REV M -- 1 YEAR WARANTY
CTC MODEL 2214 2214-2 2 AXIS - USED - 1 YEAR WARRANTY
150-A180NBD SERIES B - ALLEN BRADLEY -- 1 YEAR WARRANTY
C500-NC222 C500NC222 - USED - 1 YEAR WARRANTY
IC693DSM302-AE GE FANUC MOTION MATE NEW-FACTORY SEALED
20BD014A3AYNADC0 480VAC VFD 10HP 14AMP- 1 YEAR WARRANTY
CASHCO RANGER QCT BODY/ACTUATOR
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