How to make a closed-loop Hall current sensor

A sensor is a detection device that detects the relevant information of the detected equipment, converts it into electrical signals or other necessary forms of information output according to certain rules, and can meet the requirements of information transmission, processing, storage, display, recording and control. Sensors have a wide range of applications and provide necessary technical support for instrumentation equipment. The closed-loop Hall current sensor is a current detection element developed by applying the principle of Hall effect to isolate and detect the primary side current. The magnetic collecting ring collects the magnetic field generated by the primary side current, and the Hall element placed on the magnetic collecting ring The Hall voltage proportional to the primary side magnetic field, then let's learn how to make a closed-loop Hall current sensor!

Existing Hall current sensors have two types: open-loop and closed-loop. The open-loop current sensor has simple process, low cost, diversified installation methods, large measured current, and easy production and application. However, the detection accuracy is greatly affected by interference factors such as external environment and temperature, and the stability is poor. The operating frequency can only be below 50kHz , Some closed-loop Hall current sensors have high precision, strong anti-interference ability, good stability, and the operating frequency can reach 200kHz. However, due to the particularity of its principle, the installation method is limited, and it is generally divided into two forms: full through-hole installation and PCB installation. , it is inconvenient for users to apply flexibly, and the busbar is overcurrent. Therefore, a current sensor with easy installation and high measurement accuracy is an urgent problem to be solved.

The realization elements of closed-loop Hall current sensor technology:

The purpose of this utility model is to solve the problem of installing a closed-loop Hall current sensor without disassembling the busbar cable. The technical problem of the present invention is solved by the following technical solutions. In a closed-loop Hall current sensor including a magnetic collecting ring, a secondary coil, a Hall element, and a circuit control device, a Hall element is arranged at the air gap position on the magnetic collecting ring, and the secondary coil is wound. On the magnetic collecting ring, the circuit control device supplies power to the secondary coil and the Hall element

The beneficial effects of the present utility model compared with the prior art are as follows. The closed-loop Hall current sensor of the present utility model, the magnetic collecting ring is formed by seamless meshing of two separate iron cores, and can be easily installed without disassembling the busbar cable. . In addition, because the closed-loop structure is adopted, the precision of the closed-loop Hall current sensor can be achieved. Combining the advantages of traditional open-loop Hall current sensor and closed-loop Hall current sensor, it is easy to install and has high precision.

The above is the production method of closed-loop Hall current sensor. If you want to know more, please feel free to contact us!