Electromagnetics wireless transmission of Energy

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Discussion Overview

The discussion revolves around the wireless transmission of energy using LC resonant circuits. Participants explore the theoretical implications of energy transfer between two LC circuits operating at the same resonant frequency, considering ideal conditions and the effects of distance and field dispersion.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant posits that if two LC circuits are at the same resonant frequency, the second circuit would receive all the power radiated from the first, assuming ideal conditions.
  • Another participant challenges this claim, stating that the transmitted field is spread throughout space and referencing the inverse-square law to argue that not all power would be received.
  • There is a suggestion that the presence of a resonant circuit could concentrate the field on the receiving coil, potentially enhancing energy transfer.
  • Some participants express uncertainty about whether the discussion pertains to homework, indicating a lack of clarity on the context of the question.
  • One participant expresses skepticism about the reliability of information regarding wireless energy transmission, cautioning against misinformation.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the effectiveness of energy transfer between the two LC circuits. There are competing views regarding the implications of distance and the nature of the transmitted field.

Contextual Notes

Assumptions about ideal components and the implications of the inverse-square law are discussed, but no consensus is reached on how these factors influence energy transfer in practical scenarios.

bocchesegiacomo
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There is an LC resonant tank connected at a power source at the resonant frequency and far away from it there is Another LC circuit with the same resonant frequency connected to a multimeter.
Assuming that there is no resistance and that all components are ideal the second coil will receive all the power radiated from the first coil?
 
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Is this homework?

If you describes one of those tanks as a radio transmitter and the other one as a radio receiver, what would you say the answer is?
 
bocchesegiacomo said:
There is an LC resonant tank connected at a power source at the resonant frequency and far away from it there is Another LC circuit with the same resonant frequency connected to a multimeter.
Assuming that there is no resistance and that all components are ideal the second coil will receive all the power radiated from the first coil?
Of course not. The transmitted field is spread throughout space. Use the inverse-square law and ratio by the receive coil area.

Don't believe everything you read about wireless energy transmission (there is much more misinformation than good information about it), and don't believe what you see on YouTube.
 
berkeman said:
Of course not. The transmitted field is spread throughout space. Use the inverse-square law and ratio by the receive coil area.

Don't believe everything you read about wireless energy transmission (there is much more misinformation than good information about it), and don't believe what you see on YouTube.
But if there is a resonant circuit the field concentrates on the receiving coil
 
anorlunda said:
Is this homework?

If you describes one of those tanks as a radio transmitter and the other one as a radio receiver, what would you say the answer is?
I don't know
 
bocchesegiacomo said:
But if there is a resonant circuit the field concentrates on the receiving coil

bocchesegiacomo said:
I don't know

It sounds like you don't understand the answer that @berkeman gave you. He's correct.
 
The OP has his answer. Thread Closed.
 

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