CURRENT SENSOR AND METHOD FOR MANUFACTURING SENSOR MODULE FOR USE IN CURRENT SENSOR
First Claim
1. A current sensor for outputting a detection signal corresponding to a current flowing through a bus bar, the current sensor comprising:
- a magnetic core that concentrates and amplifies magnetic flux generated by the current near a detection portion of the bus bar;
a magnetic detection element that detects the magnetic flux concentrated by the magnetic core and outputs an electrical signal corresponding to the detected magnetic flux;
a signal processing circuit that includes electronic components and processes the electrical signal output from the magnetic detection element to generate the detection signal; and
a lead frame onto which the magnetic detection element and the electronic components of the signal processing circuit are mounted;
wherein the magnetic detection element, the electronic components, and the lead frame are combined to form a single sensor module; and
the current sensor detects the current flowing through the bus bar with the sensor module and outputs the detection signal.
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Accused Products
Abstract
A current sensor for outputting a detection signal corresponding to a current flowing through a bus bar. The current sensor includes a magnetic core that concentrates and amplifies magnetic flux generated by the current near a detection portion of the bus bar. A magnetic detection element detects the magnetic flux concentrated by the magnetic core and outputs an electrical signal corresponding to the detected magnetic flux. A signal processing circuit includes electronic components and processes the electrical signal output from the magnetic detection element to generate the detection signal. A lead frame holds the magnetic detection element and the electronic components. The magnetic detection element, electronic components, and lead frame are combined to form a single sensor module. The current sensor detects the current flowing through the bus bar with the sensor module and outputs the detection signal.
52 Citations
12 Claims
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1. A current sensor for outputting a detection signal corresponding to a current flowing through a bus bar, the current sensor comprising:
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a magnetic core that concentrates and amplifies magnetic flux generated by the current near a detection portion of the bus bar; a magnetic detection element that detects the magnetic flux concentrated by the magnetic core and outputs an electrical signal corresponding to the detected magnetic flux; a signal processing circuit that includes electronic components and processes the electrical signal output from the magnetic detection element to generate the detection signal; and a lead frame onto which the magnetic detection element and the electronic components of the signal processing circuit are mounted; wherein the magnetic detection element, the electronic components, and the lead frame are combined to form a single sensor module; and the current sensor detects the current flowing through the bus bar with the sensor module and outputs the detection signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A current sensor for detecting current and outputting a detection signal, the current sensor comprising:
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a bus bar through which the current flows; a magnetic core that concentrates and amplifies magnetic flux generated by the current near a detection portion of the bus bar; a magnetic detection element that detects the magnetic flux concentrated by the magnetic core and outputs an electrical signal corresponding to the detected magnetic flux; a signal processing circuit that includes electronic components and processes the electrical signal output from the magnetic detection element to generate the detection signal; a lead frame onto which the magnetic detection element and the electronic components are directly mounted; and a case formed by a resin first member and a resin second member and including a connector; wherein the magnetic detection element, the electronic components, and the lead frame are combined to form a single sensor module; the detection portion of the bus bar and the magnetic core are embedded in the first member; the sensor module is coupled to the second member; when the first member and the second member are coupled to each other, the magnetic core and the magnetic detection element of the sensor module form a magnetic circuit surrounding the detection portion of the bus bar; and the current sensor detects the current flowing through the bus bar with the sensor module and outputs the detection signal from the connector.
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Specification