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Registered Member #5171
Joined: Tue Jun 05 2012, 11:32AM
Location:
Posts: 67
Hello everyone again.
Someone told me that the primary has a phasing, honestly i didn't considerate that since it's AC.
Does the primary have to be wound on the same sense of the secondary? And also, should i try to invert the polarity of the primary to the bridge? Thanks.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
The primary does not need to be wound in the same direction as the secondary. However, the feedback loop has to have the right phasing, so only one polarity of the primary relative to the bridge will work.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
Yes, somehow, the coil bridge sucks more power / current than it should be, but the output were not that good, because of the phasing and the re-feedbacking of the controller. Never operate your coil without snubb caps. (you will just blow your fets)
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
This cap is exactly what I am using to achieve 3 ft streamer. Your bridge look nicer than before. What you need to do is to check your controller, then fire it up again
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
Fjust to correct what I see as a misconception in this thread. ALL capacitors "snub". The only thing hat dictates how well the do so is how fast they can accept charge, which directly translates to current. You could use anything from 20nF to 2mF, it all depends on the use. The benefit of small capacitors(the 2-20uF usually used) are that they can be physically close to the device.
To put in another way, if you want to snub 1J of transient energy, a 10u cap may see a voltage rise of 20v, where for the same energy transfer a 100u snubber may only rise 2v. These numbers are made up, but you should see what I am saying.
If you could fit a high current 100uf cap as close to the bridge as you could a 1u, then it would be preferred. But the main limiting factor is pulse current, so find a decent metalized film cap that can be close enough to the bridge.
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Low output and mosfets burn
