Double-iron-core closed-loop current sensor

Abstract

The invention provides a double-iron-core closed-loop current sensor, which comprises a circuit board, a winding coil and an iron core shell wound by the winding coil, and is characterized by furthercomprising an iron core without an opening, an iron core with an opening and a magnetic field detection element, wherein both the iron core without an opening and the iron core with an opening are located in the iron core shell, the iron core with an opening is provided with an opening running through the iron core with an opening, and the magnetic field detection element is placed in the opening.The double-iron-core closed-loop current sensor solves problems of output current oscillation, overshoot and inaccurate eccentricity measurement existing in dynamic response of a single iron core through placing the magnetic field detection element in the opening of the iron core with an opening, can greatly improve the dynamic index of the double-iron-core closed-loop current sensor, effectivelyreduces the output current oscillation and overshoot and greatly reduces an eccentric phenomenon caused by unequal reluctance 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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