| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power converter that has a function as an AC/DC transformer, a function as a circuit breaker, and a function as a frequency converter while reducing loss by suppressing heat generation along with suppressing enlargement in size, an inexpensive DC power transmission system having high power-transmission efficiency, and a power storage system. <P>SOLUTION: The power converter is provided with a DC-side iron core 3 wound around with a DC-side winding 30, an AC-side iron core 2 wound around with an AC-side winding 34, and magnetic-path switching elements 41, 42, 43, and 44 which are respectively arranged at each magnetic connection part between the DC-side iron core 3 and the AC-side iron core 2 and switch the magnetic-path connection part by controlling cutoff and passing of a magnetic flux at each magnetic connection part so as to periodically and alternately form two types of magnetic-flux flows A, B that flow in the same direction at a part of the DC-side winding 30 of the DC-side iron core 3 and whose flow directions are opposite to each other at a part of the AC-side winding 34 of the AC-side iron core 2. A magnetic-flux flow, generated with an AC current or a DC current made to flow into the AC-side winding 34 or the DC-side winding 30, is switched by each magnetic-path switching element. Consequently, it is possible to execute power conversion while generating a DC current or an AC current in the other winding 30 or 34 with magnetic induction. <P>COPYRIGHT: (C)2008,JPO&INPIT |
