Work needed to rotate armature of a generator

  • Context: High School 
  • Thread starter Thread starter athul jyothis
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    Generator Rotate Work
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Discussion Overview

The discussion revolves around the work required to rotate the armature of a generator, specifically in the context of household generators. Participants explore the relationship between work, electrical power output, and losses, as well as the strength of permanent magnets used in such generators.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant requests an equation relating to the work needed to rotate the armature of a generator.
  • Another participant suggests that the work needed will equal the electrical power output plus losses, mentioning factors like friction and losses in magnets.
  • A participant inquires about the strength of permanent magnets used in household generators.
  • There is a follow-up question regarding whether there is an equation to calculate the strength of these magnets.
  • A later reply questions the relevance of household generators, noting that not all households have them and requests a specific example.

Areas of Agreement / Disagreement

Participants express varying levels of interest and knowledge about household generators, with some focusing on the technical aspects of work and power, while others question the commonality of such generators in homes. The discussion remains unresolved regarding the specific strength of permanent magnets and the applicability of the topic to typical household scenarios.

Contextual Notes

There are limitations in the discussion regarding the lack of specific conditions under which the work is calculated and the absence of concrete examples of household generators.

athul jyothis
Pls give me an eq relating work needed to rotate armature of generated
 
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Hi athul. Welcome to the forum.

Going to need a little more context. Work needed to rotate an armature under what conditions?

Generically, the work needed to turn the generator will be equal to the electrical power you get out, plus losses. That is, you have to work at least as hard as the energy you get out, plus a little more to account for the friction in the bearings, the losses in the magnets, etc.

You might benefit from some more background reading.
https://en.wikipedia.org/wiki/Lenz's_law
https://en.wikipedia.org/wiki/Electric_generator
https://en.wikipedia.org/wiki/Electric_motor
 
Thanks for the reply ... I would like to know what will be the strength of permanent magnet used in a household generator
 
Is there any eq to calculate that
 
athul jyothis said:
I would like to know what will be the strength of permanent magnet used in a household generator

what household generator ? not too many houses have their own generator, mine doesn't
give a link to an example

Dave
 

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