| 摘要 |
PURPOSE:To provide a power-conversion control apparatus in which the destruction, the magnetic noise and the harmonic trouble of a switching element are reduced by a method wherein the carrier-wave frequency of the switching element is used properly. CONSTITUTION:A switching control device 60 feeds back a current from a current sensor 14 in a motor drive operation, and it controls the inverter of the direct current of the electric power of a battery 17 for an alternating current and the supply to a motor 16 of the alternating current. In addition, in a battery charging operation, a connector 61 is connected to a commercial power supply 11. When a connection signal is transmitted by a connection sensor 62, a microcomputer 18 judges a battery charging mode on the basis of a received signal so as to connect a contactor 13. In addition, a carrier-wave changeover means 20 changes over a carrier-wave frequency to 20kHz in the battery charging operation from 10kHz in the motor driving operation. Then, the switching control device 60 controls the converter conversion of the alternating current of the commercial power supply 11 input via a transformer 12 into a direct current and the charging operation to the battery 17 of the direct current. |
