Title:
ELECTRIC CURRENT SENSOR DEVICE
Document Type and Number:
Japanese Patent JP2023146957
Kind Code:
A
Abstract:
To provide an electric current sensor device that is hardly influenced by a temperature change and can perform current detection accurately.SOLUTION: In an electric current sensor device 10, a magnetic core 12 is annular, and a primary conductor 50 is inserted inside the magnetic core. A load 143 of a drive circuit 14 is a secondary conductor 151 that is wound around the magnetic core 12. A detection resistor 16 converts a current flowing in the secondary conductor 151 into a voltage and generates a detection voltage at one end of the detection resistor. A drive portion 141 switches the direction of the current flowing in the secondary conductor 151 on the basis of pulse signals. A detection portion 20 detects a current that has flowed in the primary conductor 50 on the basis of a duty ratio of the pulse signals. A pulse signal generation circuit 18 monitors the detection voltage generated at one end of the detection resistor 16 and inverts on/off of the pulse signals. A clock generation portion 201 of the detection portion 20 generates clock signals at a predetermined period. A counter 211 counts the duty ratio of the pulse signals using the clock signals.SELECTED DRAWING: Figure 1
Inventors:
URATA SUMIYOSHI
ABE HIROSHI
YOSHINARI TETSUYA
SAITO MASATO
MORI KENJI
ABE HIROSHI
YOSHINARI TETSUYA
SAITO MASATO
MORI KENJI
Application Number:
JP2022054424A
Publication Date:
October 12, 2023
Filing Date:
March 29, 2022
Export Citation:
Assignee:
TOKIN CORP
International Classes:
G01R15/18; G01R19/00; G01R19/32
Attorney, Agent or Firm:
Takuya Yamazaki
Takeshi Matsumoto
Hisanori Watanabe
Takeshi Matsumoto
Hisanori Watanabe
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