What is the principle of current sensor?

The application of sensors is becoming more and more extensive, and current sensor is a kind of sensor, which is mainly used to realize the induction of current. The application of current sensor has penetrated into all aspects of our lives, so what is the principle of current sensor?

1. What is the principle of current sensor? Current sensor, also known as , is a detection device that uses the Hall magnetic balance principle to complete the induction of the measured current information and output it as the required form of information. It has the characteristics of high sensitivity and strong anti-interference. It has been widely used in smart grids, household appliances, computer hard disks and other necessities of life.

2. What are the classifications of current sensors? Current sensors have different classification methods according to different classification forms. According to different working principles, they can be divided into electronic current transformers, electromagnetic current transformers and shunts. Among them, electronic current transformers include variable frequency power sensors, Rogowski current sensors, Hall current sensors, etc. Compared with electromagnetic current sensors, they have wider transmission bands, smaller sizes, lighter weights, and smaller secondary load capacity, etc., and gradually occupy most of the current sensor market. Next, we will take the classic Hall current sensor as an example to explain the principle of current sensor.

3. Hall current sensor The more famous Hall current sensor is based on the Hall effect and uses the Hall magnetic balance principle to measure various types of currents. First, the measured current is input at the control current end of the Hall element, and then a magnetic field (with an intensity of B) is applied in the normal direction of the Hall element plane. Finally, an electric potential will be generated at the output end of the Hall element, called the Hall potential (the direction is perpendicular to the current direction and the magnetic field direction). The waveform of the potential is consistent with the input current, so it can accurately reflect the changes in the measured current. The above is an introduction to the principle of current sensors. With the rapid development of science and technology, the research and development technology of sensors is also developing day by day. However, the operating principles of sensors are roughly the same. As long as we understand its principle characteristics, we can be more handy when using current sensors!