Current sensor

A current sensor, comprising:

• a current conductor to be measured, wherein the current conductor to be measured comprises a first conductor section and a second conductor section with identical shapes, the area enclosed by the extended shape of the first conductor section and the second conductor section is a “U” shape, and the first conductor section and the second conductor section are symmetrically distributed around the geometric center line of the current conductor to be measured;
• a first magnetic sensor group and a second magnetic sensor group, wherein the first magnetic sensor group is arranged at one or two sides of the first conductor section, the second magnetic sensor group is arranged at one or two sides of the second conductor section, the first magnetic sensor group and the second magnetic sensor group are symmetrically distributed around the geometric center line of the current conductor to be measured, and the first magnetic sensor group and the second magnetic sensor group have the same sensing direction;
• and
• a signal processor, a circuit board, and a shielding cover that is placed in a housing and that fully encloses the current conductor to be measured, the first magnetic sensor group, the second magnetic sensor group, the signal processor, and the circuit board;
• after a current flows through the current conductor to be measured, the first conductor section and the second conductor section generate magnetic fields to be measured respectively at the upper and lower sides in the direction of the geometric center line, the magnetic fields to be measured have the same magnitude and are distributed symmetrically in opposite directions around the geometric center line of the current conductor to be measured, the first magnetic sensor group is used for detecting a first magnetic field to be measured generated by the current flowing through the first conductor section of the current conductor to be measured, and the second magnetic sensor group is used for detecting a second magnetic field to be measured generated by the current flowing through the second conductor section of the current conductor to be measured, wherein the first magnetic field to be measured and the second magnetic field to be measured constitute a differential magnetic field to be measured, the differential magnetic field to be measured is converted into a differential voltage signal by the first magnetic sensor group and the second magnetic sensor group, the differential voltage signal is processed by the signal processor and converted into an output signal that is proportional to the current to be measured and changes along with the current to be measured in real time, and the output signal is output by an outgoing lead connected to the circuit board.