Power supply device
AssigneeToshiba Mitsubishi-Electric Industrial Systems Corporation
InventorsXiaochen ZHANG, Toshihide NAKANO
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Abstract
The uninterruptible power supply device includes a switch (2) that includes first to Nth IGBT units (U1 to UN) connected in series, and a controller that turns on the switch by turning on the first to Nth IGBT units, and turns off the switch by firstly turning off the first to nth IGBT units and then turning off the (n+1)th to Nth IGBT units. Compared with the case where the first to Nth IGBT units are turned off at the same time, it is possible to reduce a surge voltage generated between the terminals of the switch (2).
Claims10
A power supply device comprising:
- a switch including a plurality of switching elements that are connected in series between a first terminal and a second terminal, the plurality of switching elements being divided into a first group and a second group;
- and
- a controller that turns on the switch by turning on the plurality of switching elements, and turns off the switch by firstly turning off the switching elements in the first group and then turning off the switching elements in the second group.
The power supply device according to 1, wherein
- the controller turns off the switch by firstly turning off the switching elements in the first group and then turning off the switching elements in the second group after a predetermined time.
Dependencies are inferred from the claim text.