Yuav Ua Li Cas Los Tiv Thaiv Lub Rooj Sab Laj Bipolar Transistors (IGBT)

Insulated Gate Bipolar Transistors (IGBTs) yog cov khoom siv hluav taws xob sib xyaw ua ke rau cov hluav taws xob siab, siab tam sim no, thiab siab - zaus hloov. Lawv tau siv dav hauv cov tshuab xws li tsheb tshiab zog, inverter, thiab photovoltaic inverters.

 

Feem ntau ua tsis tiav ua rau IGBTs
Raws li cov ntaub ntawv pov thawj, IGBT tsis ua haujlwm feem ntau yog tshwm sim los ntawm cov hauv qab no:

Hluav taws xob Stress (kwv yees li 48%): overvoltage, overcurrent, txawv txav rooj vag tsav tsheb.
Thermal Stress (kwv yees li 32%): tsis zoo cua sov dissipation ua rau junction kub tshaj qhov txwv.
Electrostatic Discharge (ESD): rooj vag oxide txheej yog nyias nyias (0.1-0.2 μm), yooj yim puas los ntawm hluav taws xob zoo li qub.
Mechanical Stress: vuam tsis zoo los yog kev co ua rau tus pin tawg lossis kev sib cuag tsis zoo.

 

Kev Ntsuas Tseem Ceeb rau IGBTs
Kev tiv thaiv ESD
Ua ntej kev ua haujlwm: hnav cov khoom tiv thaiv- lub dab teg zoo li qub thiab xyuas kom lub chaw ua haujlwm yog hauv av.
Cia thiab tsheb thauj mus los: luv-civ peb lub electrodes ntawm IGBT thiab muab tso rau hauv ib lub thawv hlau thaiv.
Thaum lub sij hawm soldering: xyuas kom cov hlau soldering zoo - hauv av thiab, yog tias tsim nyog, lub hwj chim tawm thaum lub sij hawm soldering; tsis txhob kov tus tsav tsheb ncaj qha.

 

Tsav Circuit Court Maintenance
Parallel resistor ntawm lub rooj vag thiab emitter: feem ntau yog 10kΩ–100kΩ resistor los tiv thaiv kev tig tsis tau zoo - thaum lub rooj vag qhib.

Siv twisted khub xov hlau los xa cov teeb liab tsav los txo cov kab mob parasitic inductance thiab oscillation.

Series rooj vag resistor (piv txwv li, 10–47Ω) txhawm rau txhawm rau siab - zaus oscillations.
Xyuas kom tus tsav voltage nyob rau hauv ± 20V kom tsis txhob tshaj lub rooj vag voltage ntsuam xyuas.

 

Overvoltage thiab Overcurrent Protection
Ntxiv cov kab hluav taws xob tsis zoo (xws li RCD snubber circuits) txhawm rau txhawm rau qhov hluav taws xob sib kis thaum tig -tawm.
Teeb tsa kev tshawb pom overcurrent: tuaj yeem ua tiav los ntawm kev saib xyuas VCE (sat) lossis siv lub tshuab hloov tam sim no.
Tsim nyog derating tsim: xaiv cov khoom siv uas muaj qhov hluav taws xob txaus / cov npoo tam sim no.

 

Thermal Management
Xyuas kom zoo thermal contact ntawm lub heatsink: siv thermal roj, thiab lub mounting torque raws li specifications.
Nruab qhov kub thiab txias relays lossis thermistor los saib xyuas qhov kub thiab txias hauv lub sijhawm tiag tiag, txiav tawm lub ntsiab Circuit Court yog tias muaj cua sov dhau.
Tsis tu ncua ntxuav heatsink plua plav kom ntseeg tau tias qhov cua zoo.

 

Kev tshuaj xyuas tsis tu ncua thiab kuaj
Kev ntsuam xyuas zoo li qub: ntsuas C-E thiab G-E nrog ib lub ntsuas ntsuas tom qab fais fab tuag los xyuas qhov luv luv lossis qhib circuits.
Dynamic testing: saib lub rooj vag tsav waveform nrog lub oscilloscope thaum lub zog rau, paub meej tias tsis muaj oscillation thiab lub sijhawm nce / poob.
Kev ntsuas kub infrared: xyuas seb qhov IGBT qhov chaw kub tsis zoo li cas.