REGISTER | LOGIN
Home    Bloggers    Blogs    Article Archives    Messages    About Us   
Tw  |  Fb  |  In  |  Rss
Bryan Yarborough

Components and Methods for Current Measurement

Bryan Yarborough
Page 1 / 3 Next >
Victor Lorenzo
Victor Lorenzo
2/7/2016 9:32:52 AM
User Rank
Blogger
The extremes
Thanks for the nice post, Bryan.

Two more important parameters to take into account in current measurement are dynamic range and bandwidth. They, when combined, limit the number of sensors and sensing methods available for one specific application.

Two of my current applications go from one extreme to the opposite: measure pA/nA currents with multi-MHz bandwidth and measure lightning impact impulse currents in the range from 100A up to 200kA and bandwidth from near-DC to below 10MHz.

A "simple" 5mOhm shunt resistor capable of measuring 10/350us current impulses of 100kA peak current weights more than 5kg and has a special construct, both the electric and magnetic fields generated by the current impulse must also be taken into account. These resitors have a very careful shield design.

The final installation location for the current measuring setup also puts constraints, e.g. you can install a 15kg 200kA shunt resistor in a communications tower or building basement, but don't try it in a wind turbine blade.

50%
50%
alexvidal
alexvidal
2/4/2016 2:10:08 PM
User Rank
Newbie
Re: Similar Themes
Nice coverage. It helps me. Thanks

50%
50%
antedeluvian
antedeluvian
2/4/2016 9:06:47 AM
User Rank
Blogger
Similar Themes
Bryan

Nice coverage. I took a slightly different slant in several blogs. In case someone is trying to gather more information on the topic, here they are:

Current Measurement Part 1 and Part 2.

RMS Measurement

and I discussed transistor measurement in Using MCUs: Intelligent Digital Power Outputs.

 

50%
50%
latest blogs
This article explains how the latest-generation SiC FETs are ideally suited to new inverter designs with lower losses than IGBTs and proven robustness against short circuits, even at high temperatures and under repetitive stress
There’s a further cool thing you can do with a spreadsheet that most SPICEs can’t. That’s to use the spreadsheet ‘solver’ functionality to adjust component values in the search for a better-fitting circuit – or even to find a set of component values for a circuit you can’t otherwise design.
Infineon MOSFETs have been embedded into PC boards by Schweizer Electronic AG
You now need to adjust component values to achieve some system goal, such as predefined frequency response or time behaviour, and there’s no closed method for working out those values.
flash poll
educational resources
 
follow Planet Analog on Twitter
Planet Analog Twitter Feed
like us on facebook
our partners
Planet Analog
About Us     Contact Us     Help     Register     Twitter     Facebook     RSS