Which of the following current types are typically measured with the help of a shunt resistor?
- DC
- AC
- Impulses (4/10 us, 8/20 us, longer impulses > 500us?)
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2\$\begingroup\$ Is this a homework question? \$\endgroup\$– John DCommented Aug 29, 2020 at 23:30
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\$\begingroup\$ @JohnD it is a missing information in my script, which I am not able to find in the net \$\endgroup\$– Artur Müller RomanovCommented Aug 29, 2020 at 23:31
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2\$\begingroup\$ all of the above \$\endgroup\$– user16222Commented Aug 29, 2020 at 23:37
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\$\begingroup\$ All of the above, with impulses dependent on resolution of measuring device. \$\endgroup\$– StainlessSteelRatCommented Aug 30, 2020 at 1:19
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1 Answer
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"Typically" is tough to pin down. All 3 can be measured with a shunt, I'd say DC and impulses are more common than AC, which can be measured by a current transformer or Rogowski coil.
A current sense resistor is often used in series with the source of a FET in peak current mode SMPS control, one type of very common impulse application.
Open and closed-loop Hall effect transducers are fairly common too, so what's "typical" kind of varies with the application.
