POWER SUPPLY FOR VEHICLE

• Main Author: NAGANUMA KATSUNORI
• Format: Patent
• Language: English
• Published: 11.08.1998
• Edition: 6
• Subjects: 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

PROBLEM TO BE SOLVED: To enable continuation of the power feeding to minimum loads required, even though a constant-voltage constant-frequency inverter has been failed by operating a variable-voltage variable-frequency converter with constant- voltage constant-frequency operation by means of transfer operation of transfer means, when power feeding to a first load has become impossible. SOLUTION: If power feeding to a load 7 becomes impossible by the operation stop of a constant-voltage constant-frequency(CVCF) inverter, switches 5, 8 are switched to a closed state, and a switch 10 and an auxiliary switch 11 is switched to a closed state. By closing the switch 5, a CVCF inverter 3 is disconnected, and a load 9 is also separated by opening the switch 8. Also, by the closing operation of the switch 10, a variable-voltage variable-frequency(VVVF) inverter 4 is connected to an AC filter 6 side. In this state, the auxiliary switch 11 is also closed, and shifting to the constant-voltage constant-frequency operation occurs, and the power feeding to the load 7 is continued.