Current sensor with high and low current ranges

A current sensor, comprising:

• an input module, a high current detection module, a low current detection module, a third current detection module, and a circuit board, wherein
• the input module comprises two or more current shunting copper bars connected in parallel;
• a current to be measured flows perpendicularly to a cross section of the current shunting copper bars, and generates a magnetic field at the positions of the high current detection module and the low current detection module;
• the high current detection module is located in an internal gap of the input module;
• the high current detection module comprises a first magnetic induction module and a first signal output module which are secured on the circuit board, and the first magnetic induction module comprises a first magnetic sensing unit;
• the first magnetic sensing unit senses the magnetic field of the input module, and forms an output signal of the current sensor through the first signal output module;
• the low current detection module is located outside the input module;
• the low current detection module comprises a second magnetic induction module and a second signal output module which are secured on the circuit board, and the second magnetic induction module comprises a second magnetic sensing unit;
• and the second magnetic sensing unit senses the magnetic field of the input module, and forms an output signal of the current sensor through the second signal output module;
• and
• the third current detection module comprises a third magnetic induction module and a third signal output module;
• and the third magnetic induction module is composed of the first magnetic sensing unit in the first magnetic induction module and the second magnetic sensing unit in the second magnetic induction module, and the first magnetic sensing unit and the second magnetic sensing unit in the third magnetic induction module differentially sense the magnetic field of the input module, and form an output signal of the current sensor through the third signal output module.

A current sensor, comprising:

• an input module, a high current detection module, a low current detection module, and a circuit board, wherein
• the input module comprises a differential copper bar and a current shunting copper bar connected in parallel, and a current to be measured flows perpendicularly to a cross section of the differential copper bar and the current shunting copper bar, and generates a magnetic field at positions of the high current detection module and the low current detection module;
• the high current detection module comprises a first magnetic induction module and a first signal output module, the first magnetic induction module is secured on the circuit board and placed in an internal gap of the input module, the first magnetic induction module at least comprises a first magnetic sensing unit and a second magnetic sensing unit therein, and the first magnetic sensing unit and the second magnetic sensing unit differentially sense the magnetic field of the input module, and form an output signal through the first signal output module;
• the low current detection module comprises a second magnetic induction module and a second signal output module, the second magnetic induction module is secured on the circuit board and placed outside the input module, the second magnetic induction module at least comprises a third magnetic sensing unit and a fourth magnetic sensing unit therein, and the third magnetic sensing unit and the fourth magnetic sensing unit differentially sense the magnetic field of the input module, and form an output signal through the second signal output module;
• wherein the differential copper bar is in a step shape near the first magnetic induction module, and at least comprises a first step and a second step;
• the first magnetic sensing unit is located above the first step, and the second magnetic sensing unit is located above the second step;
• a sensitivity direction of the first magnetic sensing unit is the same as or opposite to a direction of a magnetic field generated by the differential copper bar at the first magnetic sensing unit, and is along a direction in a plane of the first magnetic induction module and perpendicular to a direction of the current to be measured;
• and a sensitivity direction of the second magnetic sensing unit is the same as or opposite to a direction of a magnetic field generated by the differential copper bar at the second magnetic sensing unit, and is along a direction in a plane of the second magnetic induction module and perpendicular to a direction of the current to be measured.