OVERCURRENT PROTECTION APPARATUS OF CONTROLLER FOR RAILWAY VEHICLE

PROBLEM TO BE SOLVED: To perform the protective operation of the controller of an inverter apparatus as sensing the abnormality of the controller, by comparing the output- current command value issued from its controller with its actual output current, and by operating the overcurrent protection cir...

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Bibliographische Detailangaben
Hauptverfasser:	IDE YUTAKA, ABE KINGO
Format:	Patent
Sprache:	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 CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To perform the protective operation of the controller of an inverter apparatus as sensing the abnormality of the controller, by comparing the output- current command value issued from its controller with its actual output current, and by operating the overcurrent protection circuit of its controller when its actual output current exceeds the command value in some case, and further, by stopping its operation. SOLUTION: For setting an overcurrent-protection setting value to a comparator 14a, an adder 16 adds a marginal portion to an output-current command value 18 issued from an inverter controlling circuit to apply a resultant addition value S8a to one input terminal of the comparator 14a. Then, when the output signal level of an absolute-value circuit 13 exceeds the output signal level S8a of the adder 16, the comparator 14a is configured to output an overcurrent sensing signal S11. When the overcurrent sensing signal S11 is outputted, the inverter controlling circuit stops the outputting of the on-off signal of a witching element, and a gate driving circuit also stops the outputting of the on-off signal (gate pulse) for driving the switching element to stop the power converting operation of an inverter apparatus.