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OUPower.com • View topic - PWM

PWM

Here we will discuss many topics on electronic designs and circuits for various functions. PIC Chip programming has enormous potential in so many applications, that will be included in this forum as well.

Chemelec...

Postby snobody » Sat Jun 28, 2008 1:53 pm

I would like to purchase one of your modded circuit current limiting pwm's off you if possible.
perhaps u could email me ... thring@shaw.ca
I know you have undergone surgery, and not sure if youre up to it yet
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Re: Chemelec...

Postby chemelec » Sat Jun 28, 2008 2:44 pm

If you Email Me, the Word "ELECTRONIC" MUST appear in the Subject Line.

My NEW Website is:
http://chemelec.com
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awwww

Postby snobody » Sat Jun 28, 2008 3:34 pm

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Re: Pulse Width Modulator Kit

Postby chemelec » Sat Jun 28, 2008 11:36 pm

If you Email Me, the Word "ELECTRONIC" MUST appear in the Subject Line.

My NEW Website is:
http://chemelec.com
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Re: Pulse Width Modulator Kit

Postby FlashBang » Sun Jun 29, 2008 12:17 am

Just becuase you are Paranoid doesn't mean that they are NOT out to get you!
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Way too much!

Postby SeaMonkey » Sun Jun 29, 2008 7:49 pm

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Postby a3holerman » Sun Jun 29, 2008 8:47 pm

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Postby chemelec » Mon Jun 30, 2008 12:03 am

If you Email Me, the Word "ELECTRONIC" MUST appear in the Subject Line.

My NEW Website is:
http://chemelec.com
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Gate Input Capacitance

Postby SeaMonkey » Mon Jun 30, 2008 4:00 am

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Postby Looking In » Mon Jun 30, 2008 7:09 am

Rich (Looking In)
((((Is it really so difficult to tell a good action from a bad one? I think one usually knows right away or a moment afterward, in a flash of regret.)))) BOOM
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Parts List

Postby huck » Mon Jun 30, 2008 6:29 pm

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PWM Circuit Examples

Postby SeaMonkey » Mon Jun 30, 2008 8:43 pm

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Postby a3holerman » Tue Jul 01, 2008 5:00 pm

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MosFet a goodun'

Postby SeaMonkey » Tue Jul 01, 2008 10:22 pm

Your research into the specs on your MosFet has affirmed that it is indeed a high current device. That is very good.

The kit may be limited to 20 Amperes in order to keep the MosFet cool and to keep from overstressing the circuit board copper. And it may be that the drive circuit is less than ideal which could cause the MosFet to dissipate more heat even at 20 Amperes.

To drive the MosFet with enough current into the Gate Input Capacitance to assure very fast switching you need a MosFet driver chip. It is not difficult to add those into an existing circuit board with a little creativity.

Once that is done you'll need to "beef up" the circuit board copper in those areas where the higher current will flow so that it won't be destroyed.

To handle 100 Ampere pulses safely the wiring will have to be quite hefty.

Looks to me like it's all doable.
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Postby huck » Thu Jul 03, 2008 10:09 pm

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