AC motor driving circuit and electric vehicle driving circuit

• Main Authors: GEKINOZU, MASAKAZU, IWAHORI, MICHIO
• Format: Patent
• Language: English; French; German
• Published: 19.06.2013
• 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; 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; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

In an AC motor driving circuit, a current source rectifier 2 is provided on the output side of an AC generator 2 and an AC motor 4 is connected to the output side of the current source rectifier 2 through a voltage source inverter 3. Along with this, one of terminals of each of a plurality of bidirectional switches 6 is connected to its own corresponding output terminal of the voltage source inverter 3, the other terminals of a plurality of the bidirectional switches 6 are lumped together to be connected to the one of terminals of a DC power source 5, and the other terminal of the DC power source 5 is connected to one of DC input terminals of the voltage source inverter 3. This eliminates need for a large capacitor at a DC link and a reactor in a chopper which were previously necessary, by which the AC motor driving circuit is downsized.