Design and implementation of Hall effect sensors.pptx

Design and implementation of Hall effect sensors

1. Design and implementation of Hall effect sensors: Gauss's Law and Biot -Savart law

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4. HALL EFFECT SENSOR Hall effect sensors measure the strength and direction of magnetic fields by exploiting the Hall effect, where a voltage difference (Hall voltage) is generated across a conductor when current flows through it and is exposed to a perpendicular magnetic field .

5. Gauss's Law Gauss's Law for magnetism states that the total magnetic flux through a closed surface is zero, implying that there are no isolated magnetic monopoles, and magnetic field lines must form closed loops. Relevance to Hall Sensors : The design of Hall effect sensors ensures that the magnetic flux through the sensor material aligns correctly to induce a measurable Hall voltage. Understanding that the magnetic flux is continuous (no monopoles) helps in sensor placement relative to the magnetic field source to maximize sensitivity.

6. Biot -Savart Law The Biot -Savart Law describes the magnetic field generated by a steady current in a conductor. It states that the magnetic field B at a point in space is the result of a small current element Id l in the conductor. Relevance to Hall Sensors : The Biot -Savart Law is essential in determining the strength of the magnetic field generated by a current source near the Hall sensor. It helps in calculating the magnetic field at a specific location, which the Hall sensor will detect. The proper positioning and orientation of the sensor relative to the magnetic field source can enhance its accuracy.

7. Applications Current Sensing : Hall effect sensors are widely used in current sensing applications, such as in power supplies and motor controllers, where the current-carrying conductor generates a magnetic field around it, which the sensor detects. Position Sensing : Hall sensors are also used to detect the position of magnets, for instance in rotary encoders.

8. RPM sensor

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