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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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MagneQuest/Peerless Forum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: low H choke design and performance considerations posted by mqracing on June 26, 2006 at 17:45:16:
Hi Mike, I just did some measurements, the max AC across any of the chokes was 28V RMS, not hundreds. That might account for the somewhat better actual behavior as opposed to the sims. The chokes aren't even getting warm, they might have gone up a degree or two but thats about it, so I don't think there is any amps worth of current flowing. This is running at 40mA coming out the end of the filter. One possible explanation is that with the low L the impedance across the choke is small so the voltage drop across it will also be small. With the more traditional 10H designs the impedance across the choke is much larger so a much larger voltage is developed.The waveforms are very strange, there is a strong 300Hz wave on top of the 120Hz you would expect. Very strange looking. By the time it gets through the second section its quite far down since the impedance at 300Hz is higher than 120Hz. After the 3rd section there is no hint of the 300Hz, its just straight 120Hz sine wave.
John S.
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Follow Ups
- Measurements - John Swenson 21:17:20 06/26/06 (2)
- Re: Measurements - mqracing 21:52:09 06/26/06 (1)
- Mike take a look at PSUD. - JLH 08:25:37 06/27/06 (0)
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