The Hall current sensor is based on the magnetic balance Hall principle, which is the closed-loop principle. When the magnetic flux generated by the primary current IP is concentrated in the magnetic circuit through a high-quality magnetic core, the Hall element is fixed in the air gap to detect the magnetic flux. The reverse compensation current is output through a multi turn coil wound around the magnetic core to cancel out the magnetic flux generated by the primary current IP, so that the magnetic flux in the magnetic circuit always remains zero. After special circuit processing, the output terminal of the sensor can accurately reflect the current changes of the primary current. Today, Wei Kewei will mainly talk about the model specifications of Hall current sensors.

1. The first three letters indicate the classification of Hall effect current sensors

DCH stands for open-loop, direct amplifying Hall effect current sensor, which outputs mostly voltage (V). DBC stands for closed loop, magnetic balance Hall effect current sensor, with output mostly in current (mA); A small portion is also converted into voltage (V) output. DVC stands for closed-loop, Hall effect voltage sensor, with the same output form as above. DDC stands for DC small current sensor, based on magnetic modulation principle, with the same output form as above. DZ stands for converter.

2. The middle number represents the rated value of the sensor mentioned above

The current sensor is ampere (A), and the voltage sensor is ampere turns (IT) or maximum operating voltage (V).

1、 The suffix letter indicates the inner hole and installation fixing method

Rectangular window (inner hole), screw fixed, socket output, no letters added. The circular inner hole is represented by O, and the installation of the circuit board is represented by P. Single power supply is represented by D. The detachable structure is represented by K.

2、 Special instructions, expressed in general technical language.

Our company's large-sized (2KA or above) Hall current sensors have the following main characteristics compared to similar products at home and abroad:

1. The magnetic circuit adopts demagnetization technology measures, and the magnetic misalignment is less than or equal to; 0.05%. The magnetic mismatch of general products reaches a hundred levels, and products from foreign companies are no exception. Some products may be scrapped due to residual magnetism caused by overload.

2. This product interferes with external magnetic fields and uses external magnetic field cancellation method; The dual magnetic circuit cancels out the interference magnetic field relatively. The signal magnetic field is designed in a strong magnetic field state, and the external magnetic field is weaker than the signal magnetic field, so the impact can be ignored.

3. The circuit adopts dual constant temperature measures to reduce temperature drift and improve stability.

Large current sensors use multiple Hall symmetric components and strong signal magnetic fields, greatly reducing the unequal position effects of Hall elements.

The above technical measures have the following characteristics for Weikewei large current sensing:

(1) High accuracy, high stability, and high reliability, suitable for any work site. Zero to zero can be achieved in any location. Realize stable, reliable, and accurate measurement and control.

Our company produces high current direct discharge current sensors, which have been researched for many years and have excellent performance.

(2) Small size, light weight, compact structure, easy installation, no need for on-site debugging

The above is a summary of Weikewei's description of the Hall current sensor model. If you are interested inhall sensor If you have any needs or want to know more, you can directly contact the customer service of Weikewei Technology.

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