Flux-gate type non-contact current measuring device

A current measuring device, non-contact technology, applied in the direction of measuring device, only measuring current, using DC to AC conversion for measurement, etc., can solve the problems of trouble, detection of DC component, large deviation of magnetic core error rate, etc. To achieve the effect of convenience of use, elimination of saturation, and avoidance of mistakes
CN104871015AInactive Publication Date: 2015-08-26李尚哲
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
李尚哲
Publication Date
2015-08-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a flux-gate type non-contact current measuring device for measuring a current to be measured by detecting an electromagnetic field around a conducting wire into which the current to be measured flows, wherein the present invention can detect a direct current component through a change of an oscillating signal by applying the oscillating signal for magnetizing two cores in mutually opposite polarities, wherein: an LC oscillation circuit is formed by using the inductance of a coil wound on one core, and the direct current component is detected by applying an LC-oscillating signal to a coil wound on the other core; an alternating current component is detected by using another core; compensated currents corresponding to the detected direct current and alternating current components are converged under a condition of offsetting a magnetic flux by the current to be measured, so that the current to be measured can be measured by measuring the compensated currents in the converged state thereof; and the present invention can normally measure a current by automatically demagnetizing an LC oscillating core even in a circumstance that the LC oscillating core is saturated by the current to be measured.
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Description

technical field

[0001] The present invention relates to a fluxgate type non-contact current measuring device that measures current by detecting an electromagnetic field around a wire in which current flows, and in particular, applies an oscillating signal that magnetizes two magnetic cores in opposite polarities, passing the oscillating signal The change of the DC component is detected by using the inductance of the coil wound on one of the magnetic cores to form an LC oscillation circuit, and the LC oscillation signal is applied to the coil wound on the other magnetic core to detect the DC component, and another magnetic core is used to detect the DC component. Detect the AC component, under the condition of offsetting the magnetic flux generated by the measured current, converge the compensation current corresponding to the detected DC and AC components, and detect the measured current by measuring the compensation current in this state, even if the LC oscillating magnetic I...

Claims

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