| 摘要 |
PROBLEM TO BE SOLVED: To provide a power feeding system capable of switching a supply source of a voltage to a load without instantaneous interruption.SOLUTION: First and second semiconductor switch parts 8, 9, 11, and 12 have such characteristics that they are turned on under control of a controller 6 when a potential difference of a predetermined value or more is generated at both ends and turned off when a current flowing between both ends is the predetermined value or less. A voltage converter 5 generates an AC output voltage having a phase shifted to a system voltage so that a voltage difference between the system voltage and an AC output voltage becomes the potential difference or more at a predetermined timing. The controller 6 controls the first and second semiconductor switch parts 8, 9, 11, and 12 by utilizing the characteristics so that the first and second switches 7 and 10 are not simultaneously in an on state at a switching operation, and so that at least one of the first semiconductor switch parts 8 and 9 and the second semiconductor switch parts 11 and 12 are in an on state when both first and second switches 7 and 10 are in an off state. |
