Matronics Email Lists :: View topic - Failed brownout battery experiment

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Failed brownout battery experiment
Goto page Previous 1, 2, 3

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

user9253

Joined: 28 Mar 2008
Posts: 1908
Location: Riley TWP Michigan

Posted: Wed Sep 25, 2013 11:59 am Post subject: Re: Failed brownout battery experiment

Bob,

I communicated privately with Eric and he is sending me his DeSlumpifier for testing.  Thanks Eric.

OK Bob, I will send you the voltage booster.  I have your address: PO Box 130.

Joe

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Sep 25, 2013 2:20 pm Post subject: Failed brownout battery experiment

At 02:59 PM 9/25/2013, you wrote:

 	  Quote: 	
		  



Bob,

I communicated privately with Eric and he is sending me his 

DeSlumpifier for testing.  Thanks Eric.

OK Bob, I will send you the voltage booster.  I have your address: PO Box 130.

Joe


	




   Which booster did you order?

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

user9253

Joined: 28 Mar 2008
Posts: 1908
Location: Riley TWP Michigan

Posted: Wed Sep 25, 2013 3:55 pm Post subject: Re: Failed brownout battery experiment

http://www.ebay.com/itm/Auto-DC-Boost-Buck-Adjustable-Converter-Solar-Volt-Regulator-4-5-32V-to-1-25-32V-/350854774856?ssPageName=ADME:L:OU:US:3160

Above is a link to the voltage booster that I ordered.  It only cost $3.25.  They say you get what you pay for.  It cost a little more than some others, but still cheap.  The copper coils looked impressive compared to some other units without them.  I can not find any more like mine for sale on eBay.  People must not be satisfied with them or else they would still be for sale.  I bench tested it before giving the seller positive feedback.  But I neglected to check the AC component of the output until it failed to power the Dynon D-180.  Do you still want me to send the unit to you Bob, or should we just consider it a poor design and toss it?

Joe

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores

henador_titzoff(at)yahoo.
Guest

Posted: Wed Sep 25, 2013 4:57 pm Post subject: Failed brownout battery experiment

Joe, all these DC to DC converters have ripple on their outputs, because they have to convert the input DC to AC, then rectify it and filter it on the way out.  On this particular model, you will see 180 KHz ripple plus harmonics.  Unfortunately, the ripple amplitude is not specified.  On top of that, it is not protected for input reverse polarity.  I believe you mentioned earlier that you tried switching input leads to see if the AC component went away.



I personally would not buy this product without the output ripple spec defined, especially for aviation applications.  I'm also leery of Made in China products, although I know some are excellent.



 

Henador Titzoff

        From: user9253 <fransew(at)gmail.com>

 To: aeroelectric-list(at)matronics.com 

 Sent: Wednesday, September 25, 2013 7:55 PM

 Subject: Re: Failed brownout battery experiment

  

 

--> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com (fransew(at)gmail.com)>



http://www.ebay.com/itm/Auto-DC-Boost-Buck-Adjustable-Converter-Solar-Volt-Regulator-4-5-32V-to-1-25-32V-/350854774856?ssPageName=ADME:L:OU:US:3160

Above is a link to the voltage booster that I ordered.  It only cost $3.25.  They say you get what you pay for.  It cost a little more than some others, but still cheap.  The copper coils looked impressive compared to some other units without them.  I can not find any more like mine for sale on eBay.  People must not be satisfied with them or else they would still be for sale.  I bench tested it before giving  the seller positive feedback.  But I neglected to check the AC component of the output until it failed to power the Dynon D-180.  Do you still want me to send the unit to you Bob, or should we just consider it a poor design and toss it?

Joe



--------

Joe Gores





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=409234#409234



_-========================; http://forums.matronics.com</                     -Mats.com/contribution" =======

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

user9253

Joined: 28 Mar 2008
Posts: 1908
Location: Riley TWP Michigan

Posted: Thu Sep 26, 2013 7:34 am Post subject: Re: Failed brownout battery experiment

The 28 volts AC that I measured using a cheap digital meter in the hangar was completely wrong.  Testing the DC -DC voltage booster in my home workshop, my Fluke 76 true RMS meter displayed 1.6mv AC.  My oscilloscope showed 12mv peak to peak ripple at a frequency of 400KHz.  I connected a 1141 automotive lamp (1.4 amp) to the ouput of the voltage booster to simulate the Dynon D-180 load.  Even though the voltage booster was set at 13 volts with no load, under load the voltage dropped over time to less than 10 volts.  So that is why the Dynon continuously booted up and shut off.  The Dynon would see 13 volts and turn on.  As the voltage from the booster dropped off, the Dynon would shut off.

  Next I adjusted the pot on the voltage booster to give 25 volts output with no load.  Then I connected the lamp.  The voltage immediately dropped to 13 volts, then slowly dropped to less than 10 volts over a period of about 3 minutes.

 I noticed that negative input and negative output are connected together on the circuit board.  It seems that the output voltage drops off as the IC heats up.  It does not get hot enough to burn, but it is too hot to hold a finger on.

  I have concluded that if this voltage booster gets its power from the starter circuit, it should prevent a brownout during engine start.  However, it is incapable of supplying power for longer than a few seconds.

  To Henador, no I never reversed the input polarity.

To Bob, since I have bench tested the voltage booster, I will not send it to you unless you still want it.  Do you?

I will test Eric's DeSlumpifier when it arrives.

Joe

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores

nuckolls.bob(at)aeroelect
Guest

Posted: Fri Sep 27, 2013 5:06 am Post subject: Failed brownout battery experiment

At 06:55 PM 9/25/2013, you wrote:

 	  Quote: 	
		  



http://www.ebay.com/itm/Auto-DC-Boost-Buck-Adjustable-Converter-Solar-Volt-Regulator-4-5-32V-to-1-25-32V-/350854774856?ssPageName=ADME:L:OU:US:3160

Above is a link to the voltage booster that I ordered.  It only cost 

$3.25.  They say you get what you pay for.  It cost a little more 

than some others, but still cheap.  The copper coils looked 

impressive compared to some other units without them.  I can not 

find any more like mine for sale on eBay.  People must not be 

satisfied with them or else they would still be for sale.  I bench 

tested it before giving the seller positive feedback.  But I 

neglected to check the AC component of the output until it failed to 

power the Dynon D-180.  Do you still want me to send the unit to you 

Bob, or should we just consider it a poor design and toss it?


	


    No, go ahead and send it to me. This part my be performing

    exactly as it was predicted. It's probably too small for the

    application. I'm not sure about the "AC component"

    I'll look at that when it gets here.



   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)aeroelect
Guest

Posted: Fri Sep 27, 2013 5:09 am Post subject: Failed brownout battery experiment

At 10:34 AM 9/26/2013, you wrote:

 	  Quote: 	
		  



The 28 volts AC that I measured using a cheap digital meter in the 

hangar was completely wrong.  Testing the DC -DC voltage booster in 

my home workshop, my Fluke 76 true RMS meter displayed 1.6mv AC.  My 

oscilloscope showed 12mv peak to peak ripple at a frequency of 

400KHz.  I connected a 1141 automotive lamp (1.4 amp) to the ouput 

of the voltage booster to simulate the Dynon D-180 load.  Even 

though the voltage booster was set at 13 volts with no load, under 

load the voltage dropped over time to less than 10 volts.  So that 

is why the Dynon continuously booted up and shut off.  The Dynon 

would see 13 volts and turn on.  As the voltage from the booster 

dropped off, the Dynon would shut off.

   Next I adjusted the pot on the voltage booster to give 25 volts 

 output with no load.  Then I connected the lamp.  The voltage 

 immediately dropped to 13 volts, then slowly dropped to less than 

 10 volts over a period of about 3 minutes.

  I noticed that negative input and negative output are connected 

 together on the circuit board.  It seems that the output voltage 

 drops off as the IC heats up.  It does not get hot enough to burn, 

 but it is too hot to hold a finger on.

   I have concluded that if this voltage booster gets its power from 

 the starter circuit, it should prevent a brownout during engine 

 start.  However, it is incapable of supplying power for longer than 

 a few seconds.

   To Henador, no I never reversed the input polarity.

To Bob, since I have bench tested the voltage booster, I will not 

send it to you unless you still want it.  Do you?

I will test Eric's DeSlumpifier when it arrives.


	


   This confirms my suspicion that the part was

   too small for the task.

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours Goto page Previous 1, 2, 3
Page 3 of 3

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum