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ID number:763295
 
Evaluation:
Published: 16.01.2008.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

Aplūkojot induktivitātes spoles labuma Q atkarību no frekvences, varam redzēt, ka,
palielinoties frekvencei, labums samazinās. No tā seko, ka pie augstām frekvencēm spolei ir lieli
ωL
zudumi. Tas redzams arī no formulas Q = , kur, palielinoties R, Q – samazinās. Lai iegūtu
R
pēc iespējas lielāku Q, arī paškapacitātei C0 vajadzētu būt mazai. Pretestībai ir daudzas
komponentes, ir gan frekvences komponente ( R f = a ⋅ f , α > 1.2...) , gan magnētiskie zudumi
α
(R ) , gan arī dielektriskie zudumi ( R = c ⋅ f 3 ) . Redzam no formulām, ka šīs visas
= b⋅ f 2
M D
komponentes ir atkarīgas no frekvences, un palielinoties frekvencei šīs komponentes ļoti strauji
palielinās, bet Q labums samazinās.

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