Hall-effect sensor for non-contact current measurement in electrical systems
A Hall-effect sensor is a solid-state device that detects magnetic fields and converts them into proportional electrical signals. It operates based on the Hall effect principle, where a voltage difference is generated across an electrical conductor when a magnetic field is applied perpendicular to the current flow. In industrial applications, it's commonly used for current sensing by measuring the magnetic field generated around a current-carrying conductor.
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Hall-effect sensors provide galvanic isolation, lower power loss, better accuracy at high currents, and no physical connection to the measured circuit.
Calibration involves applying known current values and adjusting the output using trim potentiometers or digital calibration coefficients to match the expected output voltage.
Temperature variations, external magnetic fields, mechanical stress, power supply stability, and aging of semiconductor materials can affect accuracy.
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