What does it mean to 'drive' a coil?

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    Coil Drive Mean
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Discussion Overview

The discussion revolves around the meaning of the term "drive" in the context of coils, particularly in relation to audio signals and engineering terminology. Participants explore its application in various scenarios, including speakers and other electronic components.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant suggests that "driving" a coil involves applying an AC current to create a magnetic field.
  • Another explains that in audio applications, an audio signal is amplified and used to drive a speaker coil, causing the speaker membrane to vibrate and produce sound.
  • A different participant questions the typical attachment of the magnet to the speaker cone, arguing that the voice coil is the lighter part that should be engineered for high-frequency response.
  • Another contribution clarifies that "drive" is a general engineering term meaning to supply energy to a component, and notes its broader application beyond just speaker coils.
  • One participant advises that newcomers to electrical engineering may encounter jargon that is not formally defined but is commonly used in the field.

Areas of Agreement / Disagreement

Participants express differing views on the specifics of what "drive" means in this context, with no consensus reached on its precise definition or application across different scenarios.

Contextual Notes

The discussion highlights the ambiguity in terminology and the potential for varying interpretations based on context, particularly in engineering and audio applications.

JustStudying
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I hear this term a lot but couldn't find much from a google search

My initial guess is that we put a AC current through a inductor coil to create a magnetic field.

Am I close?
 
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your audio signal is amplified and run through the speaker coil "driving" it to move the speaker membrane back and forth crating vibrations in the air which reach your ear vibrating the typanum and other parts and thus producing the sound your hear.

http://www.physics.org/article-questions.asp?id=54

http://en.wikipedia.org/wiki/Eardrum

So yes the audio signal induces a varying magnetic field that causes the magnet attached to the speaker membrane to move back and forth.
 
I don't think it is typical for the magnet to be attached to the cone (speaker membrane if you like). The voicecoil is a much lighter part of the assembly. Logically for high frequency response, this would be the part you would engineer as the moving part.
 
This is just about use of words in a particular context. The OP didn't specify a speaker coil. The term 'drive' is just a general engineering term which means to feed anything with energy. You can 'drive' an LED or Data display of some sort, a relay coil, the output stage of an RF or Audio amplifier. The term is often used when the power level is increased above what would be regarded as signal level.

@JustStudying. I suspect that you are new to the field of EE and there will be a lot of terms that turn up for you which are not formally defined but which are commonly used. This is the same as in many other fields - Sport, Computing, Music etc.. Get immersed in the topic by reading all sorts of stuff and they will begin to mean something. If in doubt and if you can't Google a meaning then get a clue from the context. If you stick to proper textbooks, you will encounter less jargon but miss out on the 'flavour' of the subject.
 

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