Piezoelectric transducer current

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Discussion Overview

The discussion revolves around methods to increase the output current from a piezoelectric transducer using PZT ceramic, with a specific requirement of achieving approximately 1.2 Amps from a current output of about 0.2 mA per unit. The scope includes technical explanations and proposed solutions for power generation from piezoelectric materials.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests using an amplifier along with external power to amplify the signal.
  • Another participant proposes adding more transducers in parallel to increase power generation.
  • A participant notes that a piezoelectric transducer behaves like a capacitor in the circuit.
  • Concerns are raised about the need for specific voltage information to calculate power, along with inquiries about the waveform and frequency of the physical stimulus applied to the transducer.
  • One participant mentions the possibility of moving the transducer to optimize its placement for better performance.
  • A suggestion is made to use a transformer to reduce voltage while increasing current, with calculations provided for the necessary turns ratio to achieve the desired current output.

Areas of Agreement / Disagreement

Participants express various methods and considerations for increasing output current, but there is no consensus on the best approach or the effectiveness of the proposed solutions. Multiple competing views remain regarding the optimal strategies for achieving the desired current output.

Contextual Notes

Participants do not specify the voltage generated or required, which is necessary for power calculations. Additionally, there are unresolved questions regarding the physical stimulus's waveform and frequency, as well as the optimal placement of the transducer.

Esfand Yar Ali
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How can I increase the output current from a piezoelectric trasnducer using PZT ceramic? The requirement is about 1.2 Amp but currently I'm only getting about 0.2 mA per unit.
 
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You can use an amplifier plus external power to amplify a signal.

But if your goal is to generate power, add more transducers in parallel.
 
Esfand Yar Ali said:
How can I increase the output current from a piezoelectric trasnducer using PZT ceramic? The requirement is about 1.2 Amp but currently I'm only getting about 0.2 mA per unit.
A piezoelectric transducer "looks like a capacitor to the circuit trying to use it".
 
Esfand Yar Ali said:
How can I increase the output current from a piezoelectric trasnducer using PZT ceramic? The requirement is about 1.2 Amp but currently I'm only getting about 0.2 mA per unit.
You should be thinking in terms of energy flow = power. You do not specify the voltage generated or required, so I can't calculate power. What is the waveform and frequency of the physical stimulus?

What does the transducer work against? Can you move the transducer to place it where the two sides are driven by a solid 180° phase movement.

A transformer will reduce the voltage while increasing the current. You would need a transformer with a voltage reduction ratio, or turns ratio of n = 1200/0.2 = 6000. That might best be done in two stages of ratio 77:1, or three stages of 18:1.
 

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