Driving power supply forestage EMI filtering protection circuit

The utility model discloses a driving power supply forestage EMI filtering protection circuit which comprises a fuse, a temperature sensitive resistor, a surge protection circuit, a differential mode interference suppression circuit, and a common mode interference suppression circuit. According to t...

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Bibliographische Detailangaben
Hauptverfasser:	ZHU HUIZONG, FENG JINYUAN, XU SIYUN, NI XINLONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	The utility model discloses a driving power supply forestage EMI filtering protection circuit which comprises a fuse, a temperature sensitive resistor, a surge protection circuit, a differential mode interference suppression circuit, and a common mode interference suppression circuit. According to the driving power supply forestage EMI filtering protection circuit, multiple levels of filtering structures are employed to carry out effective filtering of an electromagnetic interference signal which enters from a power grid, three pressure sensitive resistors with different discharge voltage values are employed to carry out discharge protection on surge voltage, the fuse and the temperature sensitive resistor close to an entrance carry out breaking protection when overcurrent occurs and play a soft starting role for the whole driving power supply. The driving power supply forestage EMI filtering protection circuit has the advantages of simple circuit, small size, low cost, good reliability, and high insertion lo