0
\$\begingroup\$

How can I measure the internal resistance of a thermoelectric generator? Can I use a standard multimeter? I am using a TEC1-12706B thermoelectric generator. I tried to use a standard multimeter to measure the internal resistance. Later I found that it is a positive component so that my measurement is wrong.

enter image description here

\$\endgroup\$
2
  • \$\begingroup\$ What value did you get for the internal resistance? How did you try to measure it? \$\endgroup\$
    – JRE
    Jan 24 at 7:49
  • \$\begingroup\$ I connected a resistor to the thermoelectric generator and then measure the current through it, after that I used the formular R= U/I to calculated the internal resistor and found r= 517.8 Ohm \$\endgroup\$ Jan 24 at 8:18

1 Answer 1

1
\$\begingroup\$

I connected a resistor to the thermoelectric generator and then measure the current through it, after that I used the formular R= U/I to calculated the internal resistor and found r= 517.8 ohm.

schematic

simulate this circuit – Schematic created using CircuitLab

Figure 1. Source resistance measuring circuit.

  • Stabilise the TEG temperature.
  • Measure the open-circuit voltage output, \$ V_{OC} \$.
  • Connect the load and measure the voltage under load, \$ V_L \$.
  • Calculate the current, \$ I = \frac {V_L} {R_L} \$.
  • Calculate the voltage drop across \$R_S\$, \$ V_d = V_{OC} - V_L \$.
  • You now have the voltage drop across \$ R_S \$ and the current through it so you can calculate, \$ R_S = \frac {V_d} I \$.
\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.