US 11,811,332 B2
Direct-current power supply apparatus, motor drive control apparatus, blower, compressor, and air conditioner
Satoru Ichiki, Tokyo (JP); Takuya Shimomugi, Tokyo (JP); Koichi Arisawa, Tokyo (JP); Keisuke Uemura, Tokyo (JP); and Kenji Iwazaki, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/268,286
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Aug. 24, 2018, PCT No. PCT/JP2018/031382
§ 371(c)(1), (2) Date Feb. 12, 2021,
PCT Pub. No. WO2020/039579, PCT Pub. Date Feb. 27, 2020.
Prior Publication US 2021/0313902 A1, Oct. 7, 2021
Int. Cl. H02M 7/219 (2006.01); H02M 1/42 (2007.01); H02M 1/00 (2006.01); G01R 19/165 (2006.01)
CPC H02M 7/219 (2013.01) [G01R 19/16538 (2013.01); H02M 1/0032 (2021.05); H02M 1/4233 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A direct-current power supply apparatus comprising:
a reactor connected at one end to an alternating-current power supply;
a bridge circuit connected to another end of the reactor and converting a first voltage output from the alternating-current power supply into a direct-current voltage, the first voltage being an alternating-current voltage; and
a current detector detecting an alternating current flowing between the alternating-current power supply and the bridge circuit, wherein
the reactor has a characteristic of reducing an inductance in accordance with an increase of the alternating current and causing, when the alternating current exceeds a first current, the inductance to be lower than one third of an inductance when a current does not flow in the reactor,
the inductance of the reactor when the alternating current is equal to the first current is set to one third of the inductance when a current does not flow in the reactor, and
the bridge circuit performs an active operation when a detection value of the alternating current is larger than or equal to the first current and performs a passive operation when the detection value of the alternating current is lower than the first current.