The affects of Lenz's Law on Wind Turbines

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Discussion Overview

The discussion centers around the implications of Lenz's Law on the operation of wind turbines, particularly focusing on the relationship between induced currents and the mechanical motion of turbines. Participants explore the theoretical aspects of this interaction and its practical implications in the context of wind energy generation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why wind turbines do not stop turning if Lenz's Law states that induced currents oppose the magnetic field that creates them, suggesting a possible connection to the turbines not being directly loaded by electrical devices.
  • Another participant reiterates the initial question, emphasizing the role of wind in maintaining turbine motion.
  • Some participants propose that there must be a point where the wind's force is insufficient to overcome the counter electromotive force generated by the turbine, leading to a potential equilibrium state.
  • It is suggested that in an ideal scenario with constant wind and current, the turbine could theoretically spin indefinitely at a constant speed once equilibrium is reached.

Areas of Agreement / Disagreement

Participants express differing views on the dynamics between wind force and counter electromotive force, indicating that the discussion remains unresolved with multiple competing perspectives on the implications of Lenz's Law for wind turbine operation.

Contextual Notes

There are assumptions regarding ideal conditions, such as constant wind and current, that are not fully explored. The discussion also does not clarify the specific mechanisms by which wind turbines maintain motion in the presence of counteracting forces.

babayevdavid
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Hi,

If an electrical generator induces a current that opposes the shifting magnetic field that creates it then why don't the wind turbines on wind farms just stop turning after a while? Is it because they are not directly connected or drawn on by electrical devices?

Thank you all in advance!
 
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babayevdavid said:
Hi,

If an electrical generator induces a current that opposes the shifting magnetic field that creates it then why don't the wind turbines on wind farms just stop turning after a while? Is it because they are not directly connected or drawn on by electrical devices?

Thank you all in advance!

Because of the wind...
 
Sure, but at some point wouldn't the wind not be enough to counteract the effects of the counter electromotive force?
 
babayevdavid said:
Sure, but at some point wouldn't the wind not be enough to counteract the effects of the counter electromotive force?

At some point you will reach equilibrium and the wind will counteract the effect of Lenz's law exactly and the turbine will simply spin at that speed forever (in an ideal world with constant current and wind supplies) .
 

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