电阻器属于配电电器吗

2024-04-12

电阻器不属于配电电器。


电阻不是用电器,是限流元件。电阻器在日常生活中一般直接称为电阻。是一个限流元件,将电阻接在电路中后,电阻器的阻值是固定的一般是两个引脚,它可限制通过它所连支路的电流大小。阻值不能改变的称为固定电阻器。阻值可变的称为电位器或可变电阻器。理想的电阻器是线性的,即通过电阻器的瞬时电流与外加瞬时电压成正比。


固定电阻器的选用有多种类型,选择哪一种材料和结构的电阻器,应根据应用电路的具体要求而定。高频电路应选用分布电感和分布电容小的非线绕电阻器。


碳膜电阻器、金属电阻器和金属氧化膜电阻器,薄膜电阻器,厚膜电阻器,合金电阻器,防腐蚀镀膜电阻器等。


高增益小信号放大电路应选用低噪声电阻器,例如金属膜电阻器、碳膜电阻器和线绕电阻器,而不能使用噪声较大的合成碳膜电阻器和有机实心电阻器。

Resistors are not electrical distribution appliances.

Resistors are not electrical appliances, they are current limiting components. Resistors are generally directly called resistors in daily life. It is a current limiting component. After a resistor is connected in a circuit, the resistance of the resistor is fixed, usually with two pins. It can limit the current flowing through the branch it is connected to. Those whose resistance value cannot be changed are called fixed resistors. Those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, that is, the instantaneous current through the resistor is proportional to the applied instantaneous voltage.

There are many types of fixed resistors. The choice of material and structure of the resistor should be based on the specific requirements of the application circuit. High-frequency circuits should use non-wirewound resistors with small distributed inductance and distributed capacitance.

Carbon film resistors, metal resistors and metal oxide film resistors, thin film resistors, thick film resistors, alloy resistors, anti-corrosion coating resistors, etc.

High-gain small-signal amplification circuits should use low-noise resistors, such as metal film resistors, carbon film resistors and wirewound resistors, instead of noisy synthetic carbon film resistors and organic solid resistors.


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