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which battery to wire too
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<blockquote data-quote="MakeshiftAudio" data-source="post: 5928760" data-attributes="member: 608963"><p>I hope he doesn't connect them in series, that would be fun to watch. xD The fets could handle it, but the drivers couldn't. When you increase voltage like that, the driver voltages change, and ofted the comparater power supplies change from ±15V to ±25V or more. The PWM drivers and comparators cannot handle that much voltage, and they fry. A fun idea I had was to use a 15V 3A voltage regulator pair (7815 and 7915, I forget the prefix) and feed it right from the what-used-to-be ±15V rails from the transfomer after it's been rectified and filtered to power the vregs, so it would generally regulate it if it is above 17-18V all the way up to 30V. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif So the driver gets the right voltage, has a common ground, and is allowed to run at extreme voltages like such. This can only work if the mosfets/igbts can handle it. (At some point, due to the LV SMPS power requirements, I move to IGBTs rather than mosfets.)</p><p></p><p>I have only done this to one amp, and it works pretty well, though I stopped using it due to it getting replaced, since I was running it on 24V, requiring 2 batteries to get this upgraded output. I just put in a 2kW amp in place that ran on a 14V system. xD</p><p></p><p>Oh, by the way, I had to put a bigger torroid on it. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif It was saturating like no other. This usually discourages people from doing it.</p><p></p><p>Cliffs:</p><p></p><p>I hope you're paralling them, and not in series like it seems in the OP. It will destroy things. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif</p></blockquote><p></p>
[QUOTE="MakeshiftAudio, post: 5928760, member: 608963"] I hope he doesn't connect them in series, that would be fun to watch. xD The fets could handle it, but the drivers couldn't. When you increase voltage like that, the driver voltages change, and ofted the comparater power supplies change from ±15V to ±25V or more. The PWM drivers and comparators cannot handle that much voltage, and they fry. A fun idea I had was to use a 15V 3A voltage regulator pair (7815 and 7915, I forget the prefix) and feed it right from the what-used-to-be ±15V rails from the transfomer after it's been rectified and filtered to power the vregs, so it would generally regulate it if it is above 17-18V all the way up to 30V. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] So the driver gets the right voltage, has a common ground, and is allowed to run at extreme voltages like such. This can only work if the mosfets/igbts can handle it. (At some point, due to the LV SMPS power requirements, I move to IGBTs rather than mosfets.) I have only done this to one amp, and it works pretty well, though I stopped using it due to it getting replaced, since I was running it on 24V, requiring 2 batteries to get this upgraded output. I just put in a 2kW amp in place that ran on a 14V system. xD Oh, by the way, I had to put a bigger torroid on it. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] It was saturating like no other. This usually discourages people from doing it. Cliffs: I hope you're paralling them, and not in series like it seems in the OP. It will destroy things. [IMG]//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif[/IMG] [/QUOTE]
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