EEVblog 1446 - Analog Watt Hour Meters are AMAZING!

Analog Watt Hour energy meters are fascinating! How they work, teardown, and experiments.

Thanks to Max Button for sending this in to the mailbag.

00:00 - Watt Hour Energy Meters
02:11 - Teardown
05:13 - What's to stop it taking off?
06:40 - Does it work? Testing with a load.
07:24 - Can you get free electicity with a neodymium magnet?
08:14 - Timelapse of no load creepage
08:49 - Anti creep holes
10:45 - When this baby hits 88 MPH you're gonna see some serious spin!
11:38 - Inside the voltage and current coils and how they work
14:39 - DaveCAD magnetic flux vector edition
19:06 - Theory of Operation
24:00 - Design Bonus - Jewel bearings
25:07 - Design Bonus - Magnetic temperature compensation
26:58 - Design Bonus - Full load compensation
27:40 - Design Bonus - Dimples

This is how serious they take their metering: https://www.ausgrid.com.au/-/media/Documents/Technical-Documentation/ES/ES12-Metering-Contestability.pdf
This model meter was cancelled from use in 2012: https://www.industry.gov.au/sites/default/files/nmi/certificates-approval/14-2-4.pdf

Forum: https://www.eevblog.com/forum/blog/eevblog-1446-analog-watt-hour-meters-are-amazing!/

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