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Registered Member #60260
Joined: Fri May 27 2016, 06:35PM
Location:
Posts: 14
Hi all,
I want to measure the voltage generated by my Mazzilli flyback converter. So far, I attached 2x 200 Meg + 2x 2.2 Meg to the main output to form a voltage divider. The voltage over one 2.2 Megger is measured with two scope probes with negatives connected, sort of simulating a differential probe.
However, I also added a rectifier tube, but I'm not sure the tube is functioning. To really ensure a zero offset measurement, I would like to use one scope probe to measure the voltage over the 2.2 Megger by connecting the negative clip to the flyback ground. However, this negative clip is also connected to mains neutral. I don't have a transformer to float the scope. Would this work or would ground bounce from the flyback or the rectifier tube not working kill the scope? If so, how can I best perform this measurement?
Registered Member #60260
Joined: Fri May 27 2016, 06:35PM
Location:
Posts: 14
Please pardon my sloppy word usage.
I connected the scope like I suggested and a big HV AC component disappeared, so that was probably a resonance between the secondaries inductance and the probes capacitance.
Registered Member #60260
Joined: Fri May 27 2016, 06:35PM
Location:
Posts: 14
I did not, but the AC component was bigger than the DC offset (250V+ on a 200:1 divider) and asymmetric between two identical probes. I was not trying to get AC bandwidth, only DC. By using only one probe I got measurements that made much more sense.
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Measure high voltage of flyback converter
