Principle of hall current sensor based on the magnetic balanced hall, namely the principle of closed loop, when the original edge of current IP magnetic all high quality core focus in magnetic circuit, the hall element fixed detection in the air gap magnetic flux, by means of the number of turns around the magnetic core coil output reverse compensation current, flux produced by the IP used to offset the original edge, resulted in the zero flux always stay in the magnetic circuit. Through special processing of the circuit, the output of the sensor can output accurately reflect current of primary side current changes.

1. What is the current sensor

      Current sensor is to isolate the measuring current. Generally done using the control and monitoring, control and IGBT with MCU, IGBT output current detection on the original edge, edge is proportional to the following signal output, MCU to follow signal sampling in IGBT control output current (such as electric welding machine, inverter, UPS, servo drive). General of sensor monitoring accuracy is not high, mainly is to monitor the original edge current size, participate in the protection (such as dc panel, junction box, etc.)

2. What is the voltage sensor, and the difference between the current sensor.

      Voltage sensor is isolation measure primary side voltage, electric current is the isolation of primary side current measurement. The voltage sensor mainly for photoelectric isolation and hall voltage sensor, current market is mainly hall voltage sensor, my company has L25P L100 and two series. Voltage sensor in principle which is mA level current sensor (the current sensor to the original edge around 2000 turn or 20000 turn, so the magnetic field is equal to 10 max20000 or X20000 turn magnetic fields produced by a bus. So the hall voltage sensor original edge to meet resistance, resistance to become specifications of rated current.

3. The current sensor to general connection mode, the original side how to pick up, time and how to connect, how resistance.

       Spread salt machine the original edge installed into PCB hole and two commonly, PCB is installed, the original electric current to flow through a needle, like AHNP, 151, ANP how much of the original edge over current needle, through customer PCB changes in tandem rated current size measurement. Perforation is the original installation cable and bus through the produce magnetic production, then the hall current sensor size of the induced magnetic field.

Time edge connection mode can be divided into current output and voltage output, current mode output: client side M side and positive and negative double sampling resistor in series between the power of public land, customers to sample the voltage on the resistance and electric current is proportional to reflect the original side. Output voltage type, customer direct sampling.