LC resonance with high Q factor, Inductor with non magnetic core

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TL;DR Summary
Lc resonance with high Q factor. Inductor with non magnetic core and air gap
Consider Inductor with air gap and solid metal core made from material with relative magnetic permeability 1 regardless of temperature (such as copper or aluminium).
There is Air gap between coil and metal core

IMG-46115e6ae36f891ba72366ded3739868-V.jpg
Please Also consider Eddy currents in the solid metal core.
The Inductor is connected with capacitor in

Series LC circuit

Parallel LC circuit

Is it possible under certain values of frequency and capacitance to obtain lc resonance with high q factor?
 
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  • #2
StoyanNikolov said:
TL;DR Summary: Lc resonance with high Q factor. Inductor with non magnetic core and air gap

Is it possible under certain values of frequency and capacitance to obtain lc resonance with high q factor?
No. The eddy current heating of the core will be significant, and so will preclude a high Q. But then your definition of high Q may be different from mine.

An LC tank circuit could be driven to oscillate at its resonant frequency, but the active oscillator element would need to make up the energy lost to the eddy currents in the core.
 
  • #3
Baluncore said:
No. The eddy current heating of the core will be significant, and so will preclude a high Q. But then your definition of high Q may be different from mine.

An LC tank circuit could be driven to oscillate at its resonant frequency, but the active oscillator element would need to make up the energy lost to the eddy currents in the core.
Let's say Is it possible with certain values of Capacitance and Frequency to obtain Resonance with Q above 20 for the given LC Circuit?
 
  • #4
StoyanNikolov said:
Let's say Is it possible with certain values of Capacitance and Frequency to obtain Resonance with Q above 20 for the given LC Circuit?
Why would you say that?
You could design it to have a Q of 20.
What are the dimensions of the coil and the core?
Why is Q relevant?
 
  • #5
Baluncore said:
Why would you say that?
You could design it to have a Q of 20.
What are the dimensions of the coil and the core?
Why is Q relevant?
With current Inductor with Solid Metal Core and the Eddy currents. Is it possible to have Q above 20. Inductor(with solid metal core) , Values of Capacitance of the Capacitor (Switched in Parallel or in Series) and input Frequency
 
Last edited:

1. What is LC resonance with high Q factor?

LC resonance with high Q factor refers to the phenomenon where an inductor and a capacitor in a circuit resonate at a specific frequency with minimal energy loss. The Q factor is a measure of the efficiency of the resonance, with higher Q factors indicating less energy loss.

2. How does an inductor with a non-magnetic core affect LC resonance?

An inductor with a non-magnetic core can enhance LC resonance by reducing magnetic losses typically associated with magnetic cores. This can result in a higher Q factor and more efficient energy transfer in the circuit.

3. What are the advantages of using an inductor with a non-magnetic core in LC resonance circuits?

Using an inductor with a non-magnetic core can lead to improved performance in LC resonance circuits due to reduced magnetic losses, higher Q factors, and better overall efficiency. Additionally, non-magnetic cores can be more stable over a wider range of temperatures compared to magnetic cores.

4. Are there any disadvantages to using an inductor with a non-magnetic core in LC resonance circuits?

One potential disadvantage of using an inductor with a non-magnetic core is that they may be more expensive than inductors with magnetic cores. Additionally, non-magnetic cores may have lower inductance values compared to their magnetic counterparts, which could impact the overall performance of the circuit.

5. How can I calculate the Q factor of an LC resonance circuit with an inductor using a non-magnetic core?

The Q factor of an LC resonance circuit can be calculated using the formula Q = 2πfL/R, where f is the resonant frequency, L is the inductance of the inductor, and R is the resistance in the circuit. By knowing these values, you can determine the Q factor of the circuit and assess its efficiency.

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