US 12,143,046 B2
Control device, electric compressor, ripple voltage detecting method, and program
Makoto Hattori, Tokyo (JP); Toyohisa Kawashima, Tokyo (JP); and Kyohei Watanabe, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP)
Appl. No. 17/766,939
Filed by MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD., Tokyo (JP)
PCT Filed Oct. 20, 2020, PCT No. PCT/JP2020/039408
§ 371(c)(1), (2) Date Apr. 6, 2022,
PCT Pub. No. WO2021/079880, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-193693 (JP), filed on Oct. 24, 2019.
Prior Publication US 2024/0079985 A1, Mar. 7, 2024
Int. Cl. H02P 29/024 (2016.01); F04B 17/03 (2006.01); F04B 49/06 (2006.01); F04B 49/10 (2006.01)
CPC H02P 29/0241 (2016.02) [F04B 17/03 (2013.01); F04B 49/065 (2013.01); F04B 49/10 (2013.01); F04B 2203/0202 (2013.01); F04B 2203/0209 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A control device comprising:
an acquisition unit that samples a voltage value of an input voltage of an electric compressor driven by a battery at unequal intervals;
a waveform calculation unit that calculates a waveform of a ripple component of the input voltage, based on the voltage value that is sampled at unequal intervals; and
a determination unit that determines a value of a ripple voltage is abnormal when the value of the ripple voltage indicates by the waveform is equal to or higher than a predetermined threshold value.