| 摘要 |
A power conversion apparatus is applied to a filter circuit. A reactor of the filter circuit includes a vertical pair of yoke iron cores, in each of which a thin strip of magnetic material is rolled in a toroidal manner and magnetic leg iron cores having respective phases being a pillar formed of thin-strip shaped magnetic material, being provided on a symmetrical position on a circumference with respect to a center of the yoke iron cores, connecting the vertical pair of the yoke iron cores, and providing a coil. The reactor also includes magnetic leg iron cores for zero-phase impedance having the respective phases, each having a rectangular parallelepiped shape in which a plurality of thin strips made of magnetic material are laminated in a direction toward a periphery from the center of the yoke iron cores and being provided between the magnetic leg iron cores. |
| 主权项 |
1. A power conversion apparatus comprising: an inverter for converting DC power and polyphase AC power with use of a switching element, and a filter circuit including a reactor provided on an AC-terminal side of the inverter, and in which the inverter turns on and off the switching element at a timing at which a carrier frequency and a fundamental frequency intersect each other to produce pseudo sine wave alternating current on the AC-terminal side and sine wave alternating current is produced by the filter circuit,
wherein the reactor of the filter circuit includes
a vertical pair of yoke iron cores, in each of which a thin strip made of magnetic material is rolled in a toroidal manner,magnetic leg iron cores having respective phases, each of the magnetic leg iron cores being a pillar formed of thin-strip shaped magnetic material, being provided on a corresponding position on a circumference with respect to a center of the yoke iron cores, connecting the vertical pair of the yoke iron cores, and providing a coil, andmagnetic leg iron cores for zero-phase impedance having the respective phases, each of the magnetic leg iron cores for zero-phase impedance having a rectangular parallelepiped shape in which a plurality of thin strips made of magnetic material are laminated in a direction toward a periphery from the center of the yoke iron cores, being provided between the magnetic leg iron cores on a corresponding position on the circumference with respect to the center of the yoke iron core, connecting the vertical pair of the yoke iron cores, and providing no coil. |
