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Potentiometer characteristics know how much
发布时间： 2024-08-15 11:26
Potentiometers are widely used in electronic products, but do you really know the characteristics of potentiometers.
The resolution of the potentiometer The resolution of the potentiometer is also called the resolution. For the wire wound potentiometer, when the moving contact moves every turn, the output voltage changes discontinuously, and the ratio of this change to the output voltage is the resolution. The theoretical resolution of the linear wire wound potentiometer is the reciprocal of the total number of turns N, and is expressed as a percentage. The more the total number of turns of the potentiometer, the higher the resolution.
The maximum working voltage of the potentiometer The maximum working voltage of the potentiometer refers to the maximum working voltage allowed by the potentiometer to work reliably for a long time without damage under the specified conditions, also known as the rated working voltage. The actual working voltage of the potentiometer is less than the rated working voltage. If the actual working voltage is higher than the rated working voltage, the power borne by the potentiometer will exceed the rated power, which will cause the potentiometer to overheat and damage.
The dynamic noise of the potentiometer When the potentiometer is under the action of an applied voltage and its moving contact point slides on the resistor body, the electrical noise generated is called the dynamic noise of the potentiometer. Dynamic noise is one of the main parameters of sliding noise, and the size of the dynamic noise value is related to the speed of the shaft, the contact resistance between the contact point and the resistor, the uneven change of the resistivity of the resistor, the number of dynamic contact points and the size of the applied voltage.
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