Hall current sensor output

Hallcurrent sensor It can be divided into direct detection type and closed-loop Hall sensor typecurrent sensor .thatHall Current Sensor What are the output characteristics? Let's do the analysis

The Hall effect is presentone thousand eight hundred and seventy-nineYear by yearE.H.Hall discovered that it defines the relationship between magnetic field and induced voltage, which is completely different from traditional induction effects. When current passes through a conductor located in a magnetic field, the magnetic field exerts a force perpendicular to the direction of electron motion on the electrons in the conductor, resulting in a voltage difference at both ends of the conductor.Thus, signal output can be achieved, and the output of the Hall current sensor is matched based on this principle.

A Hall current sensor is a sensor that utilizes the Hall effect to convert a large current into a small secondary voltage signal. Hall sensors designed in practice often amplify weak voltage signals into standard voltage or current signals through circuits such as operational amplifiers，Hall current sensor outputThe signal is a voltage or current signal.The Hall current sensor made by the above principle is called a direct detection Hall current sensor or an open-loop Hall current sensor.The accuracy of open-loop Hall sensors is usually lower than that of closed-loop current sensors, but this defect is gradually being compensated for with the development of technology.

Closed loop Hall current sensor, also known as zero flux Hall current sensor or magnetic balance Hall current sensor, is based on the magnetic balance Hall principle, i.e. the closed-loop principle, when the primary currentIPThe generated magnetic flux is concentrated in the magnetic circuit through a high-quality magnetic core, and 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 primary sideIPThe generated magnetic flux keeps the magnetic flux in the magnetic circuit always at zero. After special circuit processing, the output terminal of the sensor can accurately reflect the current changes of the primary current.Hall current sensor outputThe signal is a voltage signal. We can see thatSTKThe output signal of the series Hall current sensor is0-5VAnalog output, with a linear relationship between the output voltage signal and the primary current signal, and a nonlinearity error of up to0.05%.