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US 10,605,835 B2Granted
Current sensor
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakashi Kawanami, Yasuhiro Shimizu
Life of this patent
Estimating the term…
Abstract
A current sensor includes a substrate including a through-hole and at least one groove around the through-hole, a primary conductor extending into the through-hole and through the substrate, and through which a current to be measured flows, at least one magnetic sensor that is mounted on a first surface of the substrate and detects a strength of a magnetic field generated by the current to be measured flowing through the primary conductor, and at least one magnetic body surrounding the primary conductor and including a portion extending in the at least one groove to be fixed to the substrate.
Claims20
A current sensor comprising:
- a substrate in which a through-hole and at least one groove positioned around the through-hole are provided;
- a primary conductor that is located in the through-hole and extends through the substrate, and through which a current to be measured flows;
- at least one magnetic sensor that is mounted on a first surface of the substrate and detects a strength of a magnetic field generated by the current to be measured flowing through the primary conductor;
- and
- at least one magnetic body surrounding the primary conductor;
- wherein
- a portion of the at least one magnetic body is located in the at least one groove to be fixed to the substrate;
- and
- the primary conductor is provided closer to the at least one magnetic sensor than the at least one magnetic body.
6 more elements
A current sensor comprising:
- a substrate in which a through-hole and at least one groove positioned around the through-hole are provided;
- a primary conductor that is located in the through-hole and extends through the substrate, and through which a current to be measured flows;
- a first magnetic sensor and a second magnetic sensor each mounted on a first surface of the substrate and detecting a strength of a magnetic field generated by the current to be measured flowing through the primary conductor;
- at least one magnetic body surrounding the primary conductor;
- a portion of the at least one magnetic body is located in the at least one groove to be fixed to the substrate;
- and
- a calculator that calculates a value of the current by computing a detection value of the first magnetic sensor and a detection value of the second magnetic sensor;
- wherein
- the first magnetic sensor and the second magnetic sensor are positioned such that the primary conductor is interposed between the first magnetic sensor and the second magnetic sensor and the first magnetic sensor and the second magnetic sensor are spaced from the primary conductor;
- with regard to the strength of the magnetic field generated by the current flowing through the primary conductor, a phase of the detection value of the first magnetic sensor is reverse to a phase of the detection value of the second magnetic sensor;
- and
- the calculator is a subtractor or a differential amplifier.
9 more elements
A current sensor comprising:
- a substrate in which a through-hole and at least one groove positioned around the through-hole are provided;
- a primary conductor that is located in the through-hole and extends through the substrate, and through which a current to be measured flows;
- a first magnetic sensor and a second magnetic sensor each mounted on a first surface of the substrate and detecting a strength of a magnetic field generated by the current to be measured flowing through the primary conductor;
- at least one magnetic body surrounding the primary conductor;
- a portion of the at least one magnetic body is located in the at least one groove to be fixed to the substrate;
- and
- a calculator that calculates a value of the current by computing a detection value of the first magnetic sensor and a detection value of the second magnetic sensor;
- wherein
- the first magnetic sensor and the second magnetic sensor are positioned such that the primary conductor is interposed between the first magnetic sensor and the second magnetic sensor and the first magnetic sensor and the second magnetic sensor are spaced from the primary conductor;
- with regard to the strength of the magnetic field generated by the current flowing through the primary conductor, a phase of the detection value of the first magnetic sensor matches a phase of the detection value of the second magnetic sensor;
- and
- the calculator is an adder or a summing amplifier.
9 more elements
Dependencies are inferred from the claim text.