Sensorless measurement method and device for filter capacitor current by using a state observer

The present disclosure provides a sensorless measurement method and device for filter capacitor current by using a state observer. The method comprises receiving a filter-capacitor-voltage actual value of a present sampling time; receiving a dc-link voltage of the present sampling time; by using a s...

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Bibliographische Detailangaben
Hauptverfasser:	YANG, ZONG-ZHEN, KONISHI, YOSHIHIRO, HUANG, SHU-SYUAN, HSIEH, MIN-JU
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 MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS TESTING
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Beschreibung
Zusammenfassung:	The present disclosure provides a sensorless measurement method and device for filter capacitor current by using a state observer. The method comprises receiving a filter-capacitor-voltage actual value of a present sampling time; receiving a dc-link voltage of the present sampling time; by using a state observer, according to the filter-capacitor-voltage actual value and the dc-link voltage, outputting a filter-capacitor-voltage state variable value, wherein the filter-capacitor-voltage state variable value is a predicted voltage value of a next sampling time; by using the state observer, outputting a filter-capacitor-current state variable value, wherein the filter-capacitor-current state variable value is a predicted current value of the next sampling time, and the filter-capacitor-current state variable value is an average current value without ripples.