Cons of Stopping shaft connected to gearbox

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Discussion Overview

The discussion centers around the operation of a shaft connected to a gearbox and an induction generator, particularly focusing on the implications of intermittent rotation. Participants explore the feasibility of generating electricity from a shaft that rotates for one minute and then stops for ten seconds, questioning the need for continuous rotation and the potential components required for such a system.

Discussion Character

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

Main Points Raised

  • One participant inquires whether a gearbox can provide constant output with an intermittently rotating shaft and what the cons of such a setup might be.
  • Another participant requests clarification on the specifics of the setup, including the prime mover and the purpose of the gearbox.
  • A participant confirms that the shaft is connected to a rotating object that stops periodically and expresses interest in using an induction generator for electricity generation.
  • There is a suggestion to consider using a clutch in the system.
  • A participant emphasizes that a gearbox only changes speed and raises questions about the use of the produced electricity, suggesting the need for storage solutions due to the intermittent nature of the output.
  • Concerns are raised about the challenges of using asynchronous generators in standalone systems, with a suggestion that a DC or permanent magnet machine might be easier to implement.
  • Participants note that various electrical and mechanical solutions exist, but the choice depends on specific goals, power ratings, costs, and lifetime considerations.

Areas of Agreement / Disagreement

The discussion reveals multiple competing views regarding the feasibility of generating electricity from the described intermittent rotation and the necessary components. There is no consensus on the best approach or solution.

Contextual Notes

Participants express uncertainty about the operational requirements of the induction generator in relation to the intermittent rotation and the potential need for additional components to facilitate continuous output.

chintu
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Hi,

I'm new to this field. I'm interested in knowing electrical motor/generator operations. I have few questions here could you please help me. Qtn: I have a shaft rotating a minute and not rotating 10 seconds. i.e 1min rotates + 10sec stopped + 1min rotates + 10...and so on. In this case does gear box provides constant output? or does gear box needs continuous rotating shaft? what are the cons if the shaft stops like this?

Thanks a million in advance!
 
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I don't understand what you mean, so you have to elaborate some more.

What is the prime mover of the shaft? What is it connected to? Why do you need a gear box? Do you need to break the shaft every 1 minute? Do you want to generate electricity from the rotating/kinetic energy stored in the shaft?
 
Thank you very much for the quick reply!

Yes, shaft is connected to a rotating object which stops every minute and starts after 10seconds. So I want to connect gearbox and then to induction generator for electricity.
 
What about a clutch?
 
Thanks again!

As I'm new to this field, I do not know much about components. Please don't mind sharing your views. I will put my question in other way. I have a mean(external process) which rotates a shaft/rod for a minute and stops 10secs and again rotates 1 minutes and so on. I want to convert this kinetic energy into electricity by attaching an asynchronous induction generator. Is it possible? If yes could you please give me what are the components that I need to add in between my shaft and generator? If not why? Does induction generator accepts breakdowns(10sec) of rotating shaft? If not, is it possible to convert this broken rotations into continuous rotation(to feed to generator)?

thanks a million in advance!
 
First of all, a gearbox only changes the speed. So to determine if you need one you have to look at the shaft rotation speed in relation to the generator nominal speed.

Problem is what are you going to do with the electricity produced. It is intermittent so you may want to store it in a battery/capacitor or something for continuous output power. Or is it going to be connected to the power grid?

Asynchronous generators are difficult to run in a stand alone system. A DC / permanent magnet machine may be easier to implement if this is the case.

There are a lot of possibilities, both electrical and mechanical solutions but it really depends on what you want to achieve, power ratings, cost, lifetime etc.
 

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