Device for absorbing spike voltage at output end of frequency converter

The invention relates to a motor protection technology, particularly relates to a device for absorbing spike voltage at the output end of a frequency converter, and solves the problem that a motor can not be comprehensively and effectively protected in the existing motor protection technology. The d...

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Bibliographische Detailangaben
Hauptverfasser:	FAN YONGNING, LI JIANGUO
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 invention relates to a motor protection technology, particularly relates to a device for absorbing spike voltage at the output end of a frequency converter, and solves the problem that a motor can not be comprehensively and effectively protected in the existing motor protection technology. The device for absorbing spike voltage at the output end of a frequency converter comprises first, second and third spike voltage absorbing branch circuits, wherein the first spike voltage absorbing branch circuit comprises a first piezoresistor, a first capacitor and a first resistor; one end of the first piezoresistor is used as the input end of the first spike voltage absorbing branch circuit; the other end of the first piezoresistor is connected with one end of the first capacitor; the other end of the first capacitor is grounded; and both ends of the first resistor are respectively connected with both ends of the first capacitor. The invention is applicable to the protection of a motor.