US 12,480,982 B2
Power level acquisition circuit and apparatus
Honggui Cao, Xi'an (CN); Jijun Fang, Xi'an (CN); and Bolang Xue, Xi'an (CN)
Assigned to VERTIV TECH (XI'AN) CO., LTD., Shaanxi (CN)
Appl. No. 18/270,430
Filed by VERTIV TECH (XI'AN) CO., LTD., Shaanxi (CN)
PCT Filed Feb. 8, 2021, PCT No. PCT/CN2021/075960
§ 371(c)(1), (2) Date Jun. 29, 2023,
PCT Pub. No. WO2022/141762, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 202011623943.1 (CN), filed on Dec. 31, 2020.
Prior Publication US 2024/0094270 A1, Mar. 21, 2024
Int. Cl. G01R 21/06 (2006.01)
CPC G01R 21/06 (2013.01) 18 Claims
OG exemplary drawing
 
1. A power acquisition circuit, characterized in comprising:
an alternating current-direct current (AC-DC) conversion unit;
an acquisition unit;
a processing unit;
a power isolation unit; and
a communication isolation unit, wherein
an input terminal of the AC-DC conversion unit is connected to an alternating current power supply, and an output terminal of the AC-DC conversion unit is connected to an input terminal of the power isolation unit and a power terminal of the processing unit, for converting an alternating current to a direct current and inputting the direct current to the power isolation unit and the power terminal of the processing unit;
a sampling terminal of the acquisition unit is connected to the alternating current power supply for sampling the alternating current;
an output terminal of the power isolation unit is connected to a power terminal of the acquisition unit for isolating a current between the acquisition unit and the processing unit; and
the communication isolation unit is connected between a communication terminal of the acquisition unit and a communication terminal of the processing unit for isolating a current when the acquisition unit and the processing unit are in communication,
wherein
the acquisition unit comprises an acquisition chip, a voltage divider resistor, a non-isolation current acquisition unit, and a sampling resistor,
a terminal of the voltage divider resistor is connected to a phase line of the alternating current, and the other terminal of the voltage divider resistor is connected to a voltage acquisition terminal of the acquisition chip, for acquiring a voltage, and
a terminal of the non-isolation current acquisition unit is connected to the phase line of the alternating current, another terminal of the non-isolation current acquisition unit is connected to a terminal of the sampling resistor, and the other terminal of the sampling resistor is connected to a current acquisition terminal of the acquisition chip, for acquiring a current.