Smart Gate Drive Coupler: Kev Tiv Thaiv Kev Tiv Thaiv Rau IGBTs hauv Inverter daim ntawv thov

Smart Gate Tsav Couplers (SGDs)yog cov khoom tseem ceeb rau kev tiv thaiv cov khoom siv hluav taws xob, tshwj xeeb tshaj yog cov khoom siv hluav taws xob insulated bipolar transistors (IGBTs), los ntawm kev puas tsuaj overcurrent. Tsab ntawv xov xwm no yuav qhia txog cov ntaub ntawv tsim qauv kev ua haujlwm ntawm SGDs, tshwj xeeb tshaj yog rau Toshiba's TLP5214A / TLP5214 / TLP5212 / TLP5222 qauv, uas paub txog lawv cov VCE (sat) nrhiav muaj nuj nqi, Miller clamp muaj nuj nqi, thiab FAULT tso zis muaj nuj nqi.

1. Kev sib piv ntawm SGD coupler khoom

Cov qauv sib txawv ntawm SGD couplers sib txawv hauv qhov kev ua tau zoo, thiab qhov sib txawv no yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog. Piv txwv li, qhov siab tshaj tawm tam sim no ntawm TLP5214A / TLP5214 qauv yog ± 4.0A, thaum TLP5212 / TLP5222 qauv yog ± 2.5A. Cov khoom siv tam sim no thiab cov khoom siv hluav taws xob kuj tseem ceeb rau kev txiav txim siab, thiab qhov siab tshaj plaws ntawm cov kev ntsuas no yog 3.8mA, 3.5mA, thiab 5mA, thiab 15V txog 30V, raws li. Qhov pib nkag tam sim no thiab DESAT qhov pib tseem yog qhov tseem ceeb rau kev paub qhov txawv ntawm cov qauv sib txawv, nrog tus nqi siab tshaj plaws ntawm 6mA thiab tus nqi raug ntawm 6.5V txog 6.6V. Tsis tas li ntawd, qhov kev nthuav tawm qeeb, uas yog, qhov siab tshaj plaws ncua sij hawm ntawm lub teeb liab los ntawm kev tawm tswv yim rau cov zis, nyob ntawm 150ns txog 250ns. Raws li pom hauv daim duab 1.1

2. Cov yam ntxwv tiv thaiv

Cov yam ntxwv kev tiv thaiv ntawm SGD coupler yog nws cov haujlwm tseem ceeb, suav nrog UVLO (undervoltage lockout) muaj nuj nqi, VCE (sat) nrhiav kom tau, active Miller clamping thiab ua txhaum cov khoom tso tawm. Lub luag haujlwm UVLO ua kom ntseeg tau tias tsis muaj qhov tshwm sim tshwm sim thaum cov khoom siv hluav taws xob qis dua qhov pib, thaum lub sijhawm VCE (sat) kuaj xyuas cov khoom siv hluav taws xob-emitter ntawm IGBT thiab kaw qhov kev ua haujlwm los tiv thaiv lub cuab yeej thaum kuaj pom overcurrent. . Lub active Miller clamp txo qhov muaj peev xwm nce nruab nrab ntawm lub rooj vag thiab cov neeg sau ntawm IGBT, thaum qhov kev ua txhaum cov khoom tso tawm tawm qhov teeb meem txhaum cai rau sab tswj lub ntsiab thaum kuaj pom qhov txhaum. Overload yog pom hauv daim duab 1.2

3. Daim ntawv thov tsim

Nyob rau hauv daim ntawv thov tsim, ntau yam tsis yuav tsum tau xav txog, nrog rau lub rooj vag tsis kam, blanking lub sij hawm, luv luv Circuit Court xyuas thiab lub ntsiab sab txhaum teeb liab rub-up resistor. Lub blanking lub sij hawm teeb tsa thiab kev hloov kho tuaj yeem ua los ntawm sab nraud blanking capacitor lossis Circuit Court los kho lub sijhawm ntawm qhov ntsuas hluav taws xob sib txuas. Sab nraud blanking Circuit Court (RB) siv ib qho kev tiv thaiv sab nraud los ua kom cov nqi them tam sim no ntawm lub blanking capacitor los xyuas kom meej tias kev tiv thaiv muaj txiaj ntsig zoo thaum lub caij luv luv. Lub IGBT luv Circuit Court kuaj pom qhov pib voltage tuaj yeem hloov kho los ntawm kev ntxiv diode lossis Zener diode. Kev tsom xam ntawm lub rooj vag capacitance, rooj vag tsis kam thiab kev nthuav tawm qeeb qhia tau hais tias qhov cuam tshuam ntawm cov kev txwv no ntawm kev nthuav tawm qeeb. Lub sijhawm muag muag yog cuam tshuam los ntawm lub rooj vag capacitance thiab tso zis hluav taws xob voltage, thaum kho kom zoo ntawm bypass capacitors thiab standby terminals tuaj yeem zam tsis ua haujlwm. Kev tiv thaiv ntawm DESAT davhlau ya nyob twg los ntawm qhov hluav taws xob nce siab thaum IGBT hloov tuaj yeem ua tiav los ntawm kev ntxiv Zener diode lossis Schottky diode ntawm DESAT thiab VE terminals. Nyob rau hauv cov ntaub ntawv ntawm lub rooj vag tsav tsis txaus tam sim no, ib tug tsis transistor tuaj yeem ntxiv. LED teeb liab waveform shaping yog ib qho tseem ceeb tshwj xeeb tshaj yog thaum qhov kev ncua deb ntawm SGD coupler thiab CPU ntev, thiab cov tswv yim teeb liab waveform tuaj yeem tsim los ntawm kev siv lub hysteresis tsis. Thaum kawg, rub-up resistor RF ntawm qhov teeb meem txhaum cai ntawm sab tseem ceeb yog tsim nyog rau qhov teeb meem txhaum cai.

4. Kev txiav txim siab tsim qauv tseem ceeb

Thaum tsim ib qho SGD coupler, cov ntsiab lus tseem ceeb uas yuav tsum tau xav txog suav nrog lub rooj vag tsis kam, sib cais ntawm lub tshuab hluav taws xob ntawm lub tshuab hluav taws xob, bootstrap circuit diode, thiab lub rooj vag-emitter tsis kam. Cov xwm txheej no ua ke cuam tshuam rau kev nthuav tawm qeeb, uas muaj qhov siab tshaj plaws ntawm 150ns thiab 250ns.