As the main core component in the control and transmission system, Hall current sensor is very important in the overall stability of the equipment. It is widely used in frequency control, battery detection, power supply, servo, welding machine power supply, photovoltaic inverter. , wind power inverter, reactive power compensation, electroplating, rectification, locomotive and other industries.
The product process of a current sensor is cumbersome and has many links. Now we have listed some basic links so that everyone can have a good understanding of the current sensor and it is easy to select the current sensor.
1, circuit board PCB chip processing
The current sensor PCB on-board chip processing center unifies the patch, and the chip processing has the advantages of high precision, small error and high efficiency.
2. Welding of the remaining components of the PCB
When the placement machine is finished, the remaining components that cannot be completed by manual placement of the placement machine, such as terminals, potentiometers, and other components, are manually soldered. After the welding is completed, the visual inspection of the welding personnel reveals whether problems such as missing components and welding errors occur.
3, current sensor initial assembly
The two outgoing wires of the coil are soldered to the corresponding positions of the circuit board, and the magnetic core and the circuit board are sequentially built in the outer casing.
4, initial commissioning
When the assembly is completed, the commissioning personnel will perform the initial commissioning inspection. This step is very important before filling the glue. It is mainly to check whether the product is good. If the PCB board has a welding error, or the coil winding number is wrong, it can be replaced in time. After the completion of the commissioning, the glue is measured.
5, filling glue
After the initial adjustment of the product, if there is no problem, use a fully automatic glue injection machine for one-time filling, do not carry out secondary filling, and after filling, put it into the high temperature box, in order to make the air bubbles inside the glue Fully released under high temperature conditions to avoid quality problems caused by the appearance of bubbles.
6, secondary test
After the injection is completed, before the high and low temperature, the second test is carried out. The second test mainly involves the current from 0 to 1000A, and increments every 50A or 100A.
7, high and low temperature, aging test
After the product has been tested twice, the current sensor needs to pass various tests such as high temperature, low temperature, vibration, electric aging, and normal temperature aging. The high temperature needs to be added to 100 degrees, and the low temperature needs to be added to minus 40 degrees. The vibration test is generally in accordance with the customer's Requirements (railway, coal mine, vehicle, wind power generally have this requirement).
8, the appearance of beautification
After various tests, the product will be beautified by the staff to remove the glue on the outer casing and the terminal.
9, factory inspection
After the product has been beautified, it needs to go through the last inspection. According to the second inspection, the current is drawn from 0 to 1000A, and it is incremented every 50A or 100A, and the waveform diagram and corresponding time diagram of each stage need to be seen.
10, marking
After the product has undergone various tests and tests, it is followed by a laser marking machine to mark the product.
11, packaging
After the products have been tested and tested, the products are packaged. The packaging must be designed with pearl cotton to prevent transportation vibration, and the built-in inspection report, packing list and instructions.
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Shenzhen Jianjiantong Technology Co., Ltd. , https://www.jjthydrogelmachine.com