| 摘要 |
PURPOSE: To reduce the additional component as much as possible when a power converter mounted in an electric vehicle is used as the charger of a battery. CONSTITUTION: A series circuit of a serial diode 21 and a serial diode 22 is connected in parallel with an inverter 2, a charging power source is connected between the connecting point of both the diodes and the arbitrary phase of the AC output of the inverter 2 via a reactor 13 or the reactor 13 and a contact 14. When the charging power source is DC, its positive electrode side is connected to the reactor 13, only the arbitrary phase upper side switching circuit is turned on/off, and the other switching circuits are all turned off to charge a battery 1. When the charging power source is AC, only the arbitrary phase upper side switching circuit is turned on/off during the period of the positive voltage of the reactor 13 side, and the other switching circuits are all turned off, but only the arbitrary phase lower side switching circuit is turned on/off during the period in which the polarity is reverse, and the other switching circuits are all turned off to charge the battery 1. |
