US 12,095,348 B2
Current sensor and power conversion circuit
Takeaki Yajima, Fukuoka (JP); and Akira Toriumi, Tokyo (JP)
Assigned to JAPAN SCIENCE AND TECHNOLOGY AGENCY, Kawaguchi (JP)
Appl. No. 17/769,919
Filed by JAPAN SCIENCE AND TECHNOLOGY AGENCY, Kawaguchi (JP)
PCT Filed Oct. 28, 2020, PCT No. PCT/JP2020/040436
§ 371(c)(1), (2) Date Apr. 18, 2022,
PCT Pub. No. WO2021/085475, PCT Pub. Date May 6, 2021.
Claims priority of application No. 2019-200205 (JP), filed on Nov. 1, 2019.
Prior Publication US 2022/0393563 A1, Dec. 8, 2022
Int. Cl. H02M 1/00 (2007.01); G01R 15/09 (2006.01); H02M 3/156 (2006.01); H02M 7/12 (2006.01)
CPC H02M 1/0009 (2021.05) [G01R 15/09 (2013.01); H02M 3/156 (2013.01); H02M 7/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A current sensor comprising:
a resistance element that is connected between a first terminal and a second terminal, enters a high-resistance state when an absolute value of a current flowing between the first terminal and the second terminal is within a first range, and changes to a low-resistance state in which a resistance value is lower than that in the high-resistance state when the absolute value of the current exceeds the first range; and
a circuit that senses a value of the current based on at least one of voltages of the first terminal and the second terminal;
wherein the resistance element is in the high-resistance state when a temperature of the resistance element is within a first temperature range, and the resistance element is in the low-resistance state when the temperature is higher than the first temperature range.