What Is a Current Sensor?

Smaller power supplies have incorporated more and more new technologies. Such as switching power supply, hard switching, soft switching, voltage regulation, linear feedback voltage regulation, magnetic amplifier technology, digitally controlled 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 and more advanced intelligent control when dangerous situations such as overcurrent and overvoltage occur, it has sensor detection, sensor sampling, The power technology of sensor protection has gradually become a trend. Sensors that detect current or voltage have emerged at the historic moment and are gradually favored by the majority of power supply designers in China.

current sensor

Smaller power supplies have incorporated more and more new technologies. Such as switching power supplies, hard switches,

A current sensor is a detection device that can sense the information of the measured current, and can transform the detected information into a signal that meets certain standards and meets certain standards. informational

Current sensors can be divided into:

Current sensors are used in wind power: Wind energy, as a clean and renewable energy source, is receiving increasing attention from countries around the world. Its reserves are huge. 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 used on the earth. Wind has been used by people for a long time-mainly by pumping water and grinding the surface with windmills. In the new century, people are interested in how to use wind to generate electricity and how to maximize the amount of electricity. As the main detection element, the current sensor plays a vital role in it.

The future development trend of current sensors has the following characteristics:

1. High sensitivity. The intensity of the detected signal is getting weaker and weaker, which requires the magnetic sensor sensitivity to be greatly improved. Applications include current sensors, angle sensors, gear sensors, and space environment measurements.

2. Temperature stability. More application fields require the working environment of sensors to be more and more severe, which requires magnetic sensors to have good temperature stability. Industrial applications include the automotive electronics industry.

3. Anti-interference. In many fields, there is no evaluation of the use environment of the sensor, which requires the sensor itself to have good anti-interference. Including automotive electronics, water meters and more.

4. Miniaturization, integration and intelligence. To achieve the above requirements, this requires chip-level integration, module-level integration, and product-level integration. 5. High frequency characteristics. With the promotion of application fields, the working frequency of sensors is required to be higher and higher. Application fields include water meters, automotive electronics industries, and information recording industries.

6. Low power consumption. Many fields require the sensor itself to have extremely low power consumption, which can extend the life of the sensor. Applications include magnetic biochips, compasses, etc. implanted in the body.