US 11,811,330 B2
Converter device, motor drive device and air conditioner
Kenji Iwazaki, Tokyo (JP); Koichi Arisawa, Tokyo (JP); Takuya Shimomugi, Tokyo (JP); Satoru Ichiki, Tokyo (JP); and Keisuke Uemura, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/423,514
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Mar. 11, 2019, PCT No. PCT/JP2019/009724
§ 371(c)(1), (2) Date Jul. 16, 2021,
PCT Pub. No. WO2020/183575, PCT Pub. Date Sep. 17, 2020.
Prior Publication US 2022/0085730 A1, Mar. 17, 2022
Int. Cl. H02M 7/12 (2006.01); H02P 23/28 (2016.01); F24F 11/88 (2018.01)
CPC H02M 7/12 (2013.01) [F24F 11/88 (2018.01); H02P 23/28 (2016.02)] 8 Claims
OG exemplary drawing
 
1. A converter device comprising:
a power conversion circuit including a reactor and at least one switching element, the power conversion circuit converting a voltage of alternating-current power supplied from an alternating-current power supply into a direct-current voltage, and outputting the direct-current voltage;
a current detector detecting a current flowing in the reactor or the switching element;
a filter circuit filtering a first signal detected by the current detector; and
a control unit generating a control signal on a basis of a carrier and a second signal generated by the filter circuit and controlling, on a basis of the control signal and with a first period, the switching element, the first period being a period of the carrier, wherein the filter circuit cuts off a repetition frequency component in the first period and passes a repetition frequency component in a second period, the second period being longer than the first period, wherein the current detector detects the current with the second period.