WB series Hall current sensor/transmitter has the advantages of good linearity, wide bandwidth, fast response, strong overload capacity, etc. Its structure consists of primary circuit, magnetic ring, Hall device, secondary coil and amplifier circuit, etc., and has two working modes: direct measurement and magnetic compensation. The direct measurement type is to place the Hall device in the air gap of a ring-shaped ferromagnet with a coil winding or a direct busbar, and measure the magnetic voltage drop in the air gap, which is the measured current. The difference between the magnetic compensation type and the direct measurement type is that a balance winding is added to the ferromagnet, and the Hall device only detects the balance state of the measured current and the magnetic potential generated by the current in the balance winding in the ferromagnet. Key Words: Hall sensor; Hall transducer; Working principium Abstract: WB series Hall current sensor/ transducer possesses a lot of advantages as well as better linear, wider frequency band, faster response, and bigger over loading. The sensor is made up of original circuit, magnetic core, Hall part, secondary coil and magnifier. There are two work modes: direct measure mode and closed-loop mode. The direct measure mode is that Hall part is set into the interspace of loop winding or magnet coil, then the magnetism voltage difference or the current is measured. The difference of the two modes is adding the secondary coil at the magnet of the closed-loop sensor. The Hall part measure the magnetism voltage difference state of the measured current and the secondary current. Key Words: Hall sensor; Hall transducer; Working principium
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