Nthuav cov kev ua yuam kev ntawm Intelligent Power Modules nrog Multimeter
Intelligent Power Module (IPM) feem ntau yog tsim los ntawm Insulated Gate Bipolar Transistors (IGBTs) thiab High Voltage Insulated Gate Bipolar Thyristors (IGBTs) ua lub zog transistors, ua ke nrog kev tsav tsheb, kev tiv thaiv circuits, thiab lwm yam, raws li qhia hauv daim duab hauv qab no. Tau kawg, cov qauv sib txawv ntawm cov khoom lag luam muaj qhov sib txawv hauv kev ua haujlwm.
Tej yam txhaum:
Thaum anomalies tshwm sim, cov ntsiab lus tseem ceeb yog raws li hauv qab no:
1. Lub compressor tsis khiav thiab tso saib cov cai txhaum cai.
2. Lub compressor tsis ua haujlwm, qhia txog kev ua txhaum cai tam sim no.
3. Lub compressor tsis khiav, tso saib qhov yuam kev code qhia tias tsis muaj Circuit Court lossis tsis muaj load.
Nco tseg:
Kuj tseem muaj qhov hluav taws xob ntawm 12V, yog li yog tias hom module no puas lawm, nws yuav ua rau lub tsev sab nraum zoov CPU Circuit Court tsis ua haujlwm vim tsis muaj hluav taws xob, ua rau lub tshuab cua txias tsis ua haujlwm thiab nthuav tawm kev sib txuas lus tsis raug cai.
Fault detection:
Muaj plaub txoj hauv kev tshawb pom tseem ceeb: kev tshuaj xyuas qhov muag, ntsuas qhov hluav taws xob, ntsuas kev tiv thaiv, thiab kev hloov pauv. Siv lub oscilloscope los ntsuas qhov tso zis teeb liab waveform yuav ua rau muaj kev ua tau zoo dua. Hauv qab no yog cov kev ntsuas thiab cov kauj ruam:
Ua ntej, tso lub multimeter nyob rau hauv lub diode hom thiab ntsuas lub pem hauv ntej conduction voltage poob ntawm lub U, V, W3 tso zis terminals thiab 300V fais fab mov davhlau ya nyob twg rau hauv av, uas yog 0.403V. Qhov rov qab conduction voltage poob yog infinite (tus naj npawb tso tawm yog 1), raws li qhia hauv daim duab a.
Tom qab ntawd, muab lub tshuab hluav taws xob digital tso rau hauv hom diode thiab ntsuas qhov hluav taws xob txuas mus rau pem hauv ntej ntawm U, V, W3 tso zis terminals thiab 300V fais fab mov ntu P +, uas yog 0.448V. Qhov rov qab conduction voltage poob yog infinite (tus naj npawb tso tawm yog 1), raws li qhia hauv daim duab b.
Tom ntej no, tso cov digital multimeter nyob rau hauv hom diode thiab ntsuas qhov kev xa hluav taws xob rau pem hauv ntej ntawm U, V, W3 cov zis terminals thiab hauv av davhlau ya nyob twg P -, uas yog 0.448V. Qhov rov qab conduction voltage poob yog infinite (tus naj npawb tso tawm yog 1), raws li qhia hauv daim duab c.
Schematic daim duab ntawm multimeter ntsuas
Yog tias qhov ntsuas qhov ntsuas hluav taws xob poob qis yog 0 lossis tsawg dhau, nws qhia tau tias lub zog transistor tau tawg thiab tawg hluav taws xob. Yog hais tias ob qho tib si rau pem hauv ntej thiab rov qab cov lus qhia yog infinite, nws qhia tau hais tias lub hwj chim transistor yog qhib los yog lub internal Circuit Court yog qhib.
