On 11/30/2014 10:45 AM, Karlsson & Wang wrote:
> I have been thinking about adding a square shaped voltage signal around 50
> kHz at 15 volt or with some margin for linear voltage regulator to supply
> floating isolated power to the high side switches. There would be an initial
> cost for genera
I have been thinking about adding a square shaped voltage signal around 50 kHz
at 15 volt or with some margin for linear voltage regulator to supply floating
isolated power to the high side switches. There would be an initial cost for
generation but then it would be possible to tap of with as ma
On Sat, 29 Nov 2014, John Kasunich wrote:
> Date: Sat, 29 Nov 2014 13:07:29 -0500
> From: John Kasunich
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Notes on PWM and FETs
>
>
>
>
On Sat, Nov 29, 2014, at 11:37 AM, Kirk Wallace wrote:
>
> Thank you for the book recommendation. I have found a lot of good
> information trolling through manufacturer's documents and various
> websites.
I second that - data sheets and application notes can tell you a lot.
> This started a
On 11/29/2014 12:29 AM, Karlsson & Wang wrote:
> I would reccomend a book in power electronics I read "Power
> Electronics: Converters, Applications, and Design" at the university.
> The most important part to understand is the loss calculation, then
> you know why you need a good gate driver.
Tha
I would reccomend a book in power electronics I read "Power Electronics:
Converters, Applications, and Design" at the university. The most important
part to understand is the loss calculation, then you know why you need a good
gate driver. Diode reverse recovery is also important. I assume you a
On 11/28/2014 12:15 PM, Sven Wesley wrote:
... snip
> Would it work better with an IRZL44N? It's popular in the Arduino community
> for its logic level input.
> http://www.edaboard.com/thread245565.html
> http://forum.arduino.cc/index.php?topic=11565.0
>
> I use it in a home made engine ECU to PWM
On 11/28/2014 09:29 AM, Kirk Wallace wrote:
> Here is the start of my notes on playing with PWM and FETS.
>
> http://www.wallacecompany.com/machine_shop/LinuxCNC/pwm_fet/pwm_fet.html
>
I posted my second circuit at the link above.
JK, I used your comment about using the gate resistor to adjust th
2014-11-28 19:56 GMT+01:00 Kirk Wallace :
> On 11/28/2014 10:17 AM, John Kasunich wrote:
> > May I make a suggestion?
>
> I post my work in order to get feedback. Thank you very much for your help.
>
> My next step, which I have yet to post, added a TC4422 after the
> opto-isolator. That is what i
On 11/28/2014 10:17 AM, John Kasunich wrote:
> May I make a suggestion?
I post my work in order to get feedback. Thank you very much for your help.
My next step, which I have yet to post, added a TC4422 after the
opto-isolator. That is what is in the next scope picture. The FET ran
with barely
May I make a suggestion?
Use an optocoupler that is designed to drive MOSFET/IGBT gates.
The Avago HCPL3150 is an industry standard, I've used them many times:
http://www.digikey.com/product-detail/en/HCPL-3150-500E/516-1584-1-ND/768375
or the very similar but cheaper VO3150 from Vishay:
http://w
Here is the start of my notes on playing with PWM and FETS.
http://www.wallacecompany.com/machine_shop/LinuxCNC/pwm_fet/pwm_fet.html
--
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/
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