Dab tsi cuam tshuam tuaj yeem tshwm sim thaum lub tshuab hluav taws xob hloov pauv hloov pauv hloov hluav taws xob qhib?
Muaj ob lub ntsiab ntawm cov sampling resistors rau kev hloov cov khoom siv fais fab.
Parallel nyob rau hauv lub tso zis davhlau ya nyob twg, sampling tso zis voltage, raws li ib tug tawm tswv yim voltage teeb liab, thiab TL431 thiab lwm yam precision voltage qhov chaw sib piv, los ntawm lub tswv yim tawm tswv yim rau lub davhlau ya nyob twg tswj, tsim ib tug tas li voltage tswj voj. Feem ntau ob lub resistors yog siv los faib cov zis voltage kom tau txais cov teeb liab pub.
Lawv yog cov sampling resistor thiab qis sampling resistor. Yog tias qhov ntsuas ntsuas sab saud yog qhib Circuit Court, qhov tawm tswv yim voltage yog {{0}}, thiab lub davhlau ya nyob twg tswj tau tuaj yeem kho lub luag haujlwm ntawm PWM mus rau qhov siab tshaj plaws. Sab tswj tau tuaj yeem kho lub luag haujlwm ntawm PWM mus rau qhov siab tshaj plaws. Yog tias qhov ntsuas ntsuas sab saud qhib, qhov tawm tswv yim voltage yuav yog 0, thiab lub davhlau ya nyob twg tswj tau tuaj yeem kho PWM lub luag haujlwm mus rau qhov siab tshaj plaws, uas yuav ua rau qhov tseeb tso zis voltage siab heev thiab ua rau muaj kev puas tsuaj.
Yog tias tus qauv qis dua qhib, qhov kev tawm tswv yim voltage yog qhov tsis sib faib tawm qhov hluav taws xob, lub davhlau ya nyob twg tswj tuaj yeem kho lub luag haujlwm ntawm PWM mus rau qhov tsawg kawg nkaus, ua rau qhov tseeb tso tawm lossis tso tawm qhov hluav taws xob tsawg heev, lub load tsis ua haujlwm.
Nyob rau hauv series nrog lub switching tube, lub tam sim no ua hauj lwm ntawm lub switching tube yog hloov dua siab tshiab rau hauv ib tug voltage teeb liab thiab input mus rau lub switching fais fab mov tswj nti rau kev kuaj xyuas cov kev ua hauj lwm tam sim no ntawm lub switching tube thiab ua si lub luag hauj lwm ntawm nws yog siv los xyuas cov kev ua hauj lwm. tam sim no ntawm lub switching raj thiab ua si lub luag hauj lwm ntawm overcurrent tiv thaiv. Qhov ntawd yog hais tias, thaum lub zog hluav taws xob teeb liab nkag mus rau cov nti tswj tau tshaj li qhov muaj nqis, nws txhais tau hais tias tam sim no ntws los ntawm lub raj xa hluav taws xob loj dhau lawm, thiab cov load yuav muaj overcurrent lossis short-circuit faults. Thaum qhov hluav taws xob hluav taws xob ntawm cov tswv yim tswj nti dhau ib qho nqi, nws txhais tau hais tias qhov tam sim no ntws los ntawm lub raj xa hluav taws xob loj dhau, thiab cov khoom thauj yuav muaj qhov cuam tshuam los yog luv luv. Yog hais tias tam sim no sampling Circuit Court yog qhib-circuit, lub switching tube txuas nrog nyob rau hauv series nrog nws kuj yog qhib-circuit, ua rau lub switching fais fab mov tsis ua hauj lwm thiab tsis muaj qhov tso zis voltage.
