hall sensor It is based on the Hall effect, which is a type of magneto electric effect. When a current passes through a conductor perpendicular to the external magnetic field, a potential difference occurs between the two end faces of the conductor perpendicular to the direction of the magnetic field and current. This phenomenon is called the Hall effect. This potential difference is also known as a magnetic field sensor made of Hall potential difference.
The Hall effect is a type of magneto electric effect, which isHallDiscovered by A.H. Hall (1855-1938) in 1879 while studying the conductive mechanism of metals. Later, it was discovered that semiconductors, conductive fluids, and other materials also have this effect, and the Hall effect of semiconductors is much stronger than that of metals. Various Hall elements made using this phenomenon are widely used in industrial automation technology, detection technology, and information processing. The Hall effect is a fundamental method for studying the properties of semiconductor materials. adoptHall effectThe Hall coefficient measured experimentally can determine important parameters such as the conductivity type, carrier concentration, and carrier mobility of semiconductor materials.

(1) Current sensors must be selected with different specifications based on the rated effective value of the measured current. If the measured current exceeds the limit for a long time, it will damage the terminal power amplifier tube (referring to magnetic compensation type). Generally, the duration of twice the overload current should not exceed 1 minute.
（2）Voltage sensorA current limiting resistor R1 must be connected in series with the primary side according to the product instructions to ensure that the primary side receives the rated current. In general, the duration of double overvoltage should not exceed 1 minute.
(3) The optimal accuracy of current and voltage sensors is obtained under the condition of primary rated value, so when the measured current is higher than the rated value of the current sensor, the corresponding larger sensor should be selected; When the measured voltage is higher thanVoltage sensorWhen the rated value is reached, the current limiting resistor should be readjusted. When the measured current is less than 1/2 of the rated value, in order to obtain the best accuracy, the method of multiple turns can be used.
(4) Sensors with insulation withstand voltage of 3KV can work normally for a long time in AC systems of 1KV and below and DC systems of 1.5KV and below. Sensors with insulation withstand voltage of 6KV can work normally for a long time in AC systems of 2KV and below and DC systems of 2.5KV and below. Be careful not to use them under overvoltage.
(5) When used on devices that require good dynamic characteristics, it is best to use a single copper aluminum busbar that matches the aperture, as replacing small or multiple turns can affect the dynamic characteristics.

(6) When used in high current DC systems, if the working power supply opens or malfunctions for some reason, the iron core will produce significant residual magnetism, which is worth noting. Residual magnetism affects accuracy. The method of demagnetization is to not add a working power supply, and to apply an alternating current to the primary side and gradually reduce its value.
(7) The ability of the sensor to resist external magnetic fields is: when the distance from the sensor is 5-10cm, it exceeds onesensorThe magnetic field interference generated by a current twice the value of the primary current can be resisted. When wiring three-phase high current, the phase to phase distance should be greater than 5-10cm.
(8) In order tosensorWhen working in the best measurement state, a simple typical voltage regulator power supply as shown in Figure 1-10 should be used.
(9) The magnetic saturation point and circuit saturation point of the sensor give it strong overload capacity, but the overload capacity is time limited. When testing the overload capacity, the overload current of more than twice should not exceed 1 minute.
(10) The temperature of the primary current busbar shall not exceed 85 ℃, which is determined by the characteristics of ABS engineering plastic. If users have special requirements, high-temperature plastic can be selected as the shell.