INVERTER CIRCUIT FOR AC ELECTRIC VEHICLE

• Main Authors: KINOSHITA SHIGENORI, MOROHOSHI YUKINOBU, IWAMURA KOJI
• Format: Patent
• Language: English
• Published: 20.08.1991
• 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

PURPOSE:To reduce the size and the cost by connecting N units of VVVF transistor inverters in series and grounding the neutral point at which the inverters are separated in halves. CONSTITUTION:N(even number) units of VVVF inverters 6 are connected in series such that the DC intermediate circuit voltage can be made high. Since the voltage of the DC intermediate circuit increases when a plurality of inverters are connected in series, the intermediate point of series circuit of two inverters is grounded thus lowering the ground voltage. By such arrangement, the DC intermediate circuit voltage can be made high, output current of rectifier can be decreased correspondingly resulting in a low cost main rectifier having reduced size.