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09-14-2011, 10:42 AM | #1 |
Gone Wild
Join Date: Dec 2010
Posts: 488
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Low voltage blows DCS Controllers
I have read a number of instances where low battery voltages have been identified as being the cause of controller failures in Curtis stock DCS controllers. Any idea of what would be considered to be a low battery voltage
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09-14-2011, 01:32 PM | #2 |
Gone Wild
Join Date: Mar 2009
Location: Roseville, CA
Posts: 2,757
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Re: Low voltage blows DCS Controllers
It's not really low voltage that is the problem, it is high amperage.
The demand from the motor is in watts, as the voltage sags, the amperage increases to deliver the same wattage. The added heat from the amperage load on the diodes are what takes the controller out and DCS controllers are famous for overheat/failure. |
09-14-2011, 01:48 PM | #3 |
......................
Join Date: Apr 2009
Location: FT Lauderdale FL.
Posts: 16,416
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Re: Low voltage blows DCS Controllers
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09-14-2011, 01:59 PM | #4 |
Gone Wild
Join Date: Mar 2009
Location: Roseville, CA
Posts: 2,757
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Re: Low voltage blows DCS Controllers
Good post rib33024.
Nice to see Scotty is using my chart with some good explanations as well. |
09-14-2011, 03:02 PM | #5 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,406
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Re: Low voltage blows DCS Controllers
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09-14-2011, 03:08 PM | #6 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,406
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Re: Low voltage blows DCS Controllers
To answer the original question without muddying the water with 'I know more than you and he's got my chart'.....
Anything below 26v would be considered dangerously low. That is under load. So you must have a DVM connected to see that. If you have 34v at rest the cart could easily dip into the danger zone under load. Also in the event of one bad battery or cell the voltage drop could be more pronounced. Every DCS cart should have a DVM or a calibrated battery meter of some sort in the dash. The operator should pay attention to it to avoid controller (and battery) damage. Happy carting |
09-14-2011, 04:24 PM | #7 |
Gone Wild
Join Date: Mar 2009
Location: Roseville, CA
Posts: 2,757
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Re: Low voltage blows DCS Controllers
Yes, I created the chart over 2 years ago because the only one available was from Trojan and it wasn't complete.
I had a 42v Western cart and the Trojan chart only covered 6, 12, 24, 36 and 48v. I noticed that more people were starting to run voltages over 48v and I thought others could use the information. Here's one of my earlier posts from July 09: http://www.buggiesgonewild.com/elect...-too-fast.html I only post for the benefit and betterment of the forum. If you want to use it for your commercial endeavor, be my guest. |
09-14-2011, 04:55 PM | #8 | |
Gone Wild
Join Date: Aug 2011
Location: Bunnell, Florida
Posts: 2,408
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Re: Low voltage blows DCS Controllers
Quote:
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09-14-2011, 06:46 PM | #9 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,406
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Re: Low voltage blows DCS Controllers
The answer to that is yes but. Yes but, you could still be well in the safe zone. I can tell the difference between 100 and 85% charge in a cart I know. When I get in a customers cart I can usually tell what percentage of charge they are by driving them.
This is why you need a voltmeter or some type of SOC meter on the cart. Every cart is a little different. I dunno if this helps? |
09-14-2011, 07:22 PM | #10 |
Gone Wild
Join Date: Aug 2011
Location: Bunnell, Florida
Posts: 2,408
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Re: Low voltage blows DCS Controllers
Thanks, Scott! Yes that helps for sure! Something I never knew is not to run the batteries below 50%. I can't think of the number of times they were so low, I had to use reverse to get back!
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