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電感的運用場(chǎng)合及說(shuō)明

來(lái)源:發(fā)布時(shí)間:2020-11-18 16:46:59點(diǎn)擊率:

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First, the occasion of the application of inductor.

Attention should be paid to moist and drying, concave and convex ambient temperature, high-frequency or low-frequency environment, rational inductance or impedance characteristics, etc.
Second, the frequency characteristics of inductors.
At low frequency, the inductor usually has the characteristics of inductance, which only plays the role of energy storage and high frequency filtering.
But at high frequency, its impedance characteristic is very obvious. There is a phenomenon of energy consumption and heat, and the rational effect is reduced by one level. The high frequency characteristics of different inductors are different.
The inductance of ferrite material is explained below:
The ferrite material is Fe-mg alloy or Fe-Ni alloy, which has high magnetic conductivity, so the capacitance between the inductor coils and windings is the smallest under the condition of high frequency and high resistance. Ferrite materials are usually used at high frequency, because they are mainly inductive at low frequency, making the on-line loss very small. In the case of high frequency, they mainly show the reactance characteristic ratio and change with the frequency. In practical application, ferrite materials are used as high frequency attenuators in RF circuits. In practice, ferrite is better equivalent to the parallel connection of resistance and inductor. the resistance is short-circuited by inductor at low frequency and the inductance impedance becomes so high at high frequency that the current passes through the resistance. Ferrite is a consuming device on which high-frequency energy is converted into thermal energy, which is determined by its resistance characteristics.


一、電感運用的場(chǎng)合
    濕潤與枯燥、環(huán)境溫度的凹凸、高頻或低頻環(huán)境、要讓電感體現的是理性,仍是阻抗特性等,都要留意。
二、電感的頻率特性
    在低頻時(shí),電感通常出現電感特性,只起蓄能,濾高頻的特性。
    但在高頻時(shí),它的阻抗特性體現的很明顯。有耗能發(fā)熱,理性效應降低一級現象。不相同的電感的高頻特性都不相同。
    下面就鐵氧體料的電感加以說(shuō)明:
    鐵氧體料是鐵鎂合金或鐵鎳合金,這種料具有很高的導磁率,所以電感的線(xiàn)圈繞組之間在高頻高阻的狀況下發(fā)生的電容小。鐵氧體料通常在高頻狀況下運用,因為在低頻時(shí)他們首要電感特性,使得線(xiàn)上的損耗很小。在高頻狀況下,他們首要呈電抗特性比而且隨頻率改變。實(shí)踐運用中,鐵氧體料是作為射頻電路的高頻衰減器運用的。實(shí)踐上,鐵氧體較好的等效于電阻以及電感的并聯(lián),低頻下電阻被電感短路,高頻下電感阻抗變得相當高,以至于電流悉數經(jīng)過(guò)電阻。鐵氧體是一個(gè)消耗設備,高頻能量在上面轉化為熱能,這是由它的電阻特性決議的。

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