 LCLR MOSFET heating problem
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ShawnLG
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Tue May 08 2007, 05:27PM
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Registered Member #286
Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
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I calculated the proper inductance for the L-matching inductor to connect between the inverters and the parrellel LC primery for my micro SSTC. The tank is in tuned with the new network and now the fets heat up when in operation. They did not heat up with the capacitance matching setup that I always used before and now the spark length is not as great. What could be wrong?
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Sulaiman
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Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
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Just to check,
the series capacitor was a much lower value than the resonant/tank capacitor
the new series inductor should be a similar ratio LARGER than the resonant/tank inductor, yes?
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ShawnLG
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Registered Member #286
Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
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I tried to keep the ratios the same with the switch over.
Series capacitor setup:
series capacitor 1500pf
tank capacitor 2500pf + variable cap
primery 1.2uH
Series inductor setup:
series inductor 3.34091uH
DC blocking cap .056uf
tank capacitor 5000pf + variable cap
primery 1.2uH
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