Double-iron-core closed-loop current sensor

Abstract

The invention provides a dual-core closed-loop current sensor, which includes a circuit board, a winding coil, an iron core shell wound by the winding coil, and also includes a non-opening iron core, a split iron core and a magnetic field detection element; the non-opening iron core Both the split iron core and the split iron core are located in the iron core shell, the split magnet is provided with an opening passing through the split iron core, and the magnetic field detection element is placed in the opening. The dual-core dual-core closed-loop current sensor of the present invention solves the problems of output current oscillation, overshoot and inaccurate measurement of eccentricity in the dynamic response of a single core by placing the magnetic field detection element in the opening of the open core, and can be used. The dynamic index of the dual-core closed-loop current sensor is greatly improved, the output current oscillation and overshoot are effectively reduced, and the eccentricity caused by the unequal reluctance is greatly reduced at the same time.

Description

technical field [0001] The invention belongs to the technical field of sensors, in particular to a double-iron core double-iron closed-loop current sensor. Background technique [0002] The sensor is a detection device that can detect the relevant information of the equipment under inspection, and convert it into an electrical signal or other required form of information output according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording and control. Sensors have a wide range of applications and provide a necessary technical support for instrumentation equipment. The Hall current sensor is a current detection element developed by applying the Hall effect principle to isolate and detect the primary current. The magnetic field generated by the primary current is collected by the magnetic gathering ring, and the Hall element placed in the magnetic gathering ring The magnetic field is collected to generate a Ha...

AI Technical Summary

Problems solved by technology

[0003] The iron core used in closed-loop current sensors currently on the market is usually a single iron core with full openings, which can meet the application requirements when measuring DC current.

However, in terms of dynamic response, such as tracking the pulse current, it will cause the output current to oscillate, overshoot, and eccentrically inaccurate due to the influence of the opening reluctance of the iron core and the inductance of the winding coil.

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