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Hall Effect Current Sensor - Things to Know by mary parker
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Hall Effect Current Sensor - Things to Know |
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Electronics
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A current sensor is a device that is used to detect an electric current whether AC or DC current. The way the Hall Effect current sensor works is based on Edwin Hall’s theory, and hence being named after him. This sensor works by varying its output voltage based on the changes on a magnetic field. When there is a conductor in a magnetic field that is placed perpendicularly to a current with an electric current flowing through, a force is produced by the magnetic field on the electrons that are flowing, and pushes these electrons to the sides of the conductor. A voltage difference referred to as the Hall Voltage is produced between the conductor sides. Assuming the magnetic field is already known as it would be in a fixed magnet, measurement of the hall voltage can be done to establish the distance from the conductor. This is how the Hall Effect current sensor is used. These Hall Effect current sensors are in other times referred to as switches because of the digital on and off voltage signal they produce when in use. They are also different from magnetic sensors which normally produce AC signal that varies greatly in voltage depending on speed. The Hall Effect sensors are not affected by speed, but rather produce a constant voltage signal which can go from zero to maximum very fast. One of the applications of these sensors is; sensing the rounds per minute in brushless direct current motors. This is achieved by having a sensor on each stator which is the stationary part of the motor to have a more accurate measurement. Measuring voltage in any system can be done without having to interfere with the system performance, but measuring current which is more intrusive requires one to introduce certain sensors such as the Hall Effect current sensors which may or may not affect the system performance. Current measurement enables one to manipulate the performance of the system mainly with an emphasis on improvement. This is what the sensors here are used. Typically, a Hall Effect current sensor is made up of three wires; one for the ground, one for output signal while the last is for the supply or reference voltage. These sensors are available from different electronics and mechanical shops, and cost differently depending on the type or amount of current they measure. For instance, a sensor that measures above 40A will be relatively expensive as compared to a sensor that measures below 40A. This kind of difference depends on the function application of the sensor. If one is going to use it measuring higher voltage, then they require one that is capable to measure a higher voltage and vice versa for optimum results. Failure to follow this can result in either a malfunction or getting incorrect information which will depict a false reading or measurement. Common functions that use these are like some computer keyboards and antilock brakes and many others which use a Hall probe and magnets. For more information on the Hall Effect Current Sensor , you can visit Hall Effect Sensor.org.
Related Articles -
Hall Effect current sensor, Hall Effect sensors,
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