More and more new technologies have been incorporated into small power supply devices. For example, switching power supply, hard switch, soft switch, voltage regulation, linear feedback voltage regulation, magnetic amplifier technology, CNC voltage regulation, PWM, SPWM, electromagnetic compatibility and so on. The actual demand directly promotes the continuous development and progress of power supply technology, in order to automatically detect and display current, and have automatic protection function and more advanced intelligent control when dangerous situations such as overcurrent and overvoltage occur, the power supply technology with sensor detection, sensor sampling, and sensor protection is gradually becoming a trend. Sensors that detect current or voltage emerge as The Times require and are gradually favored by power designers in our country.

       The current sensor is the most important one in the power supply equipment, which is also known as the magnetic sensor. The current sensor can feel the information of the measured current, and can transform the detected information into an electrical signal or other required form of information output that meets certain standards according to certain laws to meet the requirements of information transmission, processing, storage, display, recording and control. For example, switching power supply, hard switch, soft switch, etc.

       Current sensors can be used in household appliances, smart grids, electric vehicles, wind power generation, etc., and many magnetic sensors are used in our lives, such as computer hard drives, compasses, household appliances, and so on.

       Classification of current sensors

       According to different measurement principles, current sensors can be divided into: shunt, electromagnetic current transformer, electronic current transformer and so on.

       Electronic current transformers include Hall current sensors, Rokowski current sensors, and AnyWay variable frequency power sensors (for voltage, current, and power measurements) specifically for variable frequency power measurement.

       Compared with electromagnetic current sensor, electronic current transformer has no ferromagnetic saturation, wide transmission frequency band, small secondary load capacity, small size and light weight, which is the development direction of current sensor in the future.

       Application of current sensors

       Application of current sensors to wind power generation: As a clean renewable energy, wind energy has been paid more and more attention by countries around the world. The global wind energy is about 2.74 ×109GW, of which the available wind energy is 2×107GW, which is 10 times larger than the total amount of water energy that can be developed and utilized on Earth. Wind has long been used by people - mainly through windmills to pump water, grind surfaces, etc., and in the new century, people are interested in how to use wind to generate electricity, and how to maximize the power generation. Current sensor, as the main detection element, plays a vital role in it.

       The future development trend of current sensors

       1. High sensitivity

       As the strength of the detected signal becomes weaker and weaker, the current sensor needs to have higher sensitivity. This is suitable for a variety of application scenarios, including current sensors, Angle sensors, gear sensors and space environment measurements.

       2. Temperature stability

       In harsher operating environments, the sensor must have good temperature stability to ensure normal operation at a variety of temperatures. This is especially important in the automotive electronics industry.

       3. anti-interference

       In many application scenarios, the sensor needs to have a strong anti-interference ability to deal with the complex electromagnetic environment. This applies to automotive electronics, water meters and other fields.

       4. Miniaturization, integration and intelligence

       In order to meet the space and performance requirements of modern electronic devices, current sensors need to be continuously miniaturized, integrated, and equipped with intelligent functions such as self-calibration and adaptive adjustment.

       5. high frequency characteristics

       With the expansion of application fields, the operating frequency requirements of sensors are becoming higher and higher, especially in the water meter, automotive electronics and information recording industries ‌.

       6. Low power consumption

       In many application scenarios, sensors require extremely low power consumption to extend service life and are suitable for applications such as implantable devices and compasses.

 ‌      7. Technological progress ‌

       With the progress of process technology, the chip size continues to shrink, which promotes the miniaturization of current sensors and improves the portability and efficiency of electronic devices ‌.

‌       8. Go green ‌

       The use of environmentally friendly materials and production processes to reduce the impact on the environment and meet the requirements of sustainable development.