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I recorded the following from my bike, it shows the output from the alternator (RM21). The red line is the actual output, the truncation at +/- 10V is due to the limited range of the DATAQ data acquisition device. The blue line is a sine wave I've overlaid to provide some idea of what the full waveform might look like. Three output cycles take about 45 ms equivalent to 1350 crankshaft rpm. This sample shows the three wave forms seen throughout the 20 second or so recording. There are two "clean" waves flanked by one that is "stepped" on the negative half of the cycle and one stepped on the positive side. Mostly there are hundreds of cycles of the stepped type with scattered examples of the clean type.

The regulator/rectifier is a Boyer PowerBox and the battery is an Anti Gravity LifePo4. There's a volt/ammeter on the bike and while recording this data the system voltage was 13V and the battery was charging at about 0.5A (before starting the bike the battery voltage was 12.8V).

Does anyone familiar with the PowerBox know if this looks like normal operation?

I've been having problems with the charging system. The onboard volt/ammeter shows that it is working intermittently and battery voltage is reducing over time. I don't think this snapshot of the output has captured the intermittent problem, but it would be useful to know if these wave forms are normal or not.


[ATTACH=full]93588[/ATTACH]


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