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Registered Member #3781
Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701
If I wrapped two primaries around the same flyback and hooked 1 primary to 1 driver and the other primary to the other driver would the arc be a lot more powerful? I will run both primaries off of 2 seperate power supplies
Does anyone know why my plasma speaker arc gets a lot smaller when I parallel fets? Also I insulated them on the same heatsink but do I need to if they are paralleled?
EDIT: I bought but they heat up a lot faster than my old IRF644 which doesn't make sense to me because the new fet has a lower rds(on) than the IRF
Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
Camp Badger wrote ...
If I wrapped two primaries around the same flyback and hooked 1 primary to 1 driver and the other primary to the other driver would the arc be a lot more powerful? I will run both primaries off of 2 seperate power supplies
If you phased them correctly it would work. If they are off, however, you could end up just dumping power from one driver into the other.
Camp Badger wrote ...
Does anyone know why my plasma speaker arc gets a lot smaller when I parallel fets? Also I insulated them on the same heatsink but do I need to if they are paralleled?
If they are in parallel without balancing then they have a common drain and do not need isolation. Not sure about the paralleled issue if you are using the same FETs. Is it possible you are not turning them off as quickly due to the increase in total gate capacitance?
Camp Badger wrote ...
EDIT: I bought but they heat up a lot faster than my old IRF644 which doesn't make sense to me because the new fet has a lower rds(on) than the IRF
You're overlooking Rds(partially on) and its duration.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Camp Badger wrote ...
If I wrapped two primaries around the same flyback and hooked 1 primary to 1 driver and the other primary to the other driver would the arc be a lot more powerful? I will run both primaries off of 2 seperate power supplies
You will not achieve double the power if thats your plan.
About magnetic saturation, the ferrite or steel core is like a bucket, you can fill a 1 gallon bucket with upto 1 gallon, but if you add 1.1 gallons, then 0.1 gallons will overflow. The ferrite is similar to the bucket, the magnetism like the water.
Camp Badger wrote ...
Does anyone know why my plasma speaker arc gets a lot smaller when I parallel fets? Also I insulated them on the same heatsink but do I need to if they are paralleled?
If driven by the same signal and have the same connections they do not need insulation, why your arc gets smaller I dont know.
Camp Badger wrote ...
EDIT: I bought but they heat up a lot faster than my old IRF644 which doesn't make sense to me because the new fet has a lower rds(on) than the IRF
Dont know.
Edit1: i have been drinki9ng EDIT2: scotchtapelord beat me with a ninja post! lol!
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Questions about flybacks and mosfets
