US 12,218,616 B2
Power supply device
Masaki Shoji, Tokyo (JP); Nobuhiro Kihara, Tokyo (JP); and Kado Nakagawa, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Mar. 17, 2022, as Appl. No. 17/697,016.
Claims priority of application No. 2021-080758 (JP), filed on May 12, 2021.
Prior Publication US 2022/0368271 A1, Nov. 17, 2022
Int. Cl. H02P 29/68 (2016.01); H02M 1/14 (2006.01); H02M 1/32 (2007.01); H02P 27/06 (2006.01)
CPC H02P 29/68 (2016.02) [H02M 1/14 (2013.01); H02M 1/327 (2021.05); H02P 27/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A power supply device comprising:
a converter connected to a power supply and having a plurality of switching elements;
a temperature detection circuit for detecting a temperature of the converter;
an inverter which is connected between the converter and a load, and which converts output voltage of the converter and outputs resultant voltage to the load; and
a controller to control the switching elements so that the output voltage of the converter becomes predetermined target output voltage, wherein
when the temperature detected by the temperature detection circuit has exceeded a predetermined first limitation value, the controller controls the switching elements so that the output voltage of the converter becomes voltage of the power supply from the target output voltage, wherein:
i): a change rate of the output voltage is a first constant change rate, or
ii): a duty cycle of the switching elements varied at a second constant change rate.