Max Power Transfer: Optimal Load for Piezo & EM Gen

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Discussion Overview

The discussion revolves around determining the optimal load for combining the outputs of a piezoelectric generator and an electromagnetic generator to achieve maximum power transfer. The focus includes the differing characteristics of each generator and their respective ideal load conditions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the piezoelectric generator produces maximum voltage across a 3 Mohm resistor, while the electromagnetic generator does so at 68 ohms.
  • Another participant requests a diagram to better understand the system, highlighting the differences between the two power sources.
  • A participant describes the construction of the electromagnetic generator, detailing its coil and magnet specifications, and mentions that both generators are housed in an aluminum casing.
  • It is suggested that the energy output of each generator needs to be assessed, as they have different source impedances and waveforms, complicating their efficient combination.
  • One participant expresses that using either generator alone may yield more energy than attempting to combine them.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of combining the two generators for maximum output, with some suggesting that it may not be efficient due to their differing characteristics. There is no consensus on an ideal load for combining the outputs.

Contextual Notes

The discussion highlights the need for further analysis of the energy delivery from each generator, as well as the implications of their differing impedances and waveforms, which remain unresolved.

QandA4u
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Hello everyone, I have two generators, piezoelectric and electromagnetic generator. Piezoelectrics are producing maximum voltage across 3 Mohm resistor where as EM generator is producing maximum voltage at 68 ohm. What would be the ideal load for to get the maximum output from both when combined? Thank you.
 
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QandA4u said:
Hello everyone, I have two generators, piezoelectric and electromagnetic generator. Piezoelectrics are producing maximum voltage across 3 Mohm resistor where as EM generator is producing maximum voltage at 68 ohm. What would be the ideal load for to get the maximum output from both when combined? Thank you.

Welcome to the PF. Can you post a diagram of your system? Those two power sources are very different... :smile:
 
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Hello Berkeman, I have attached the pic of piezoelectric generator, whereas EM generator is a simple generator with a coil of 500 turns made up of enamelled copper wire of 0.15 gauge and grade N35 Neodymium magnets. Both the transducers are assembled in an Aluminium casing which when pressed produces electric energy. Hope this will help, thank you
 

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QandA4u said:
Hello Berkeman, I have attached the pic of piezoelectric generator, whereas EM generator is a simple generator with a coil of 500 turns made up of enamelled copper wire of 0.15 gauge and grade N35 Neodymium magnets. Both the transducers are assembled in an Aluminium casing which when pressed produces electric energy. Hope this will help, thank you
It is necessary to first ascertain how much energy each is delivering. The generators produce power with widely different source impedances and different waveforms, so there is no simple way of connecting them to efficiently utilise both sources. Using one or the other generator will give more energy.
 
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tech99 said:
It is necessary to first ascertain how much energy each is delivering. The generators produce power with widely different source impedances and different waveforms, so there is no simple way of connecting them to efficiently utilise both sources. Using one or the other generator will give more energy.

Thank you Tech99 I will consider your point (Y)
 

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