Rau siab - cov tsav tsheb zaus thiab cov tsav tsheb nrog kev tiv thaiv kev ua haujlwm, cov neeg siv uas xav sim qhov zoo li qub (tsis muaj lub zog loj) tso tawm waveform yuav tsum nco ntsoov cov hauv qab no:
1. Yog hais tias lub hwj chim transistor (IGBT) los yog MOSFET twb txuas nrog lub Circuit Court, siv tus tsav tsheb fais fab mov thiab PWM input teeb liab, thiab cov teeb liab tso zis yuav tsum pom ntawm cov zis siv lub oscilloscope.
2. Yog hais tias lub hwj chim transistor tsis txuas thiab koj tsuas yog sim cov zis, lub collector thiab emitter (los yog ntws thiab qhov chaw) terminals ntawm lub hwj chim transistor yuav tsum luv luv -circuited. Yog tias cov khoom siv los yog cov dej ntws tawm sab laug, tus neeg tsav tsheb lossis pawg tsav tsheb yuav txhais lub zog transistor luv luv -circuited thiab qhib nws txoj kev tiv thaiv sab hauv. Qhov tshwm sim tiv thaiv teeb liab waveform yuav txawv kiag li ntawm cov tswv yim PWM teeb liab nyob rau hauv ob qho tib si duab thiab lub sij hawm. Qhov kev sib tw tseem ceeb hauv IGBT daim ntawv thov yog muab kev tiv thaiv zoo tiv thaiv overcurrent, luv -circuit, thiab overvoltage. Overcurrent faults feem ntau yuav siv sij hawm ib ntus ua rau lub hwj chim muab hluav taws xob overheat, yog li kev tiv thaiv rau tus mob no yog tswj hwm los ntawm pawg tswj hwm lub ntsiab. Overvoltage feem ntau tshwm sim thaum IGBT tua. Qhov loj di/dt tsim lub siab voltage hla tus kab mob parasitic inductance, yuav tsum tau ib tug snubber circuit kom clamp lub voltage los yog tsim nyog txo qhov tig -tawm tus nqi. Qhov luv luv - qhov ua txhaum ntawm Circuit Court tam sim no ua rau muaj qhov siab heev, uas tuaj yeem ua rau IGBT sai sai. Kev tiv thaiv overcurrent ntawm lub rooj tsav xwm tseem ceeb feem ntau tsis txaus, yuav tsum tau muaj kev tiv thaiv tam sim ntawm tus tsav tsheb los yog tsav tsheb.
