 Alternately driven parallel IGBT in half bridge - lowering the switching freq demands?
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Mates
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Wed Oct 24 2007, 05:26PM
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Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
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Hi guys,
I have one idea I'd like to discuss. For SSTC you all prefer FET trans because of the switching speed. However I have an idea of lowering the demands on transistor switching freq twice and still keep the same resonant freq of the coil.
Scheme:
.........................Primary
____TR1-A____ ____I_______TR2-A_______
I___TR1-
B____I............I____TR2-B____I
(ignore the dots)
Driving
TR1-A __---___________________________
TR2-A _______________---______________
TR1-B________---
______________________
TR2-
B________________________---______
Do you have somebody an idea how to elegantly drive four transistors in this manner ?
Mates
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Capper
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Registered Member #914
Joined: Fri Jul 20 2007, 06:22PM
Location: South Bend, IN
Posts: 85
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Flip-flop, or 74139 decoder.
C@P
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Steve Ward
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Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
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This doesnt really help the switching frequency issue but does spread the power over more devices. The switching frequency is really referring to the shortest period between switch transitions.
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