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Extreme DC! Extreme Electric Golf Carts!



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Unread 05-15-2012, 05:30 AM   #21
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Default Re: OK, I've been thinking again......

You'd have to break the series of batteries in order to insert another one in the loop. So you'd need a double pole double throw contactor, which would break the loop anywhere it's convenient. So the instant you punch it, for a split second you'd loose the 48, before the other 12 comes into the mix. Simply a solenoid and a pedal switch and some cables are all you need. You'd probably have to disconnect any accessories, though they'd probably drop out on voltage drop anyway.

Just thinkin' out loud here, before the coffee's kicked in, but I think if you sketch it up, it should work.
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Unread 05-15-2012, 08:36 AM   #22
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Default Re: OK, I've been thinking again......

Quote:
Originally Posted by yurtle View Post
You'd have to break the series of batteries in order to insert another one in the loop. So you'd need a double pole double throw contactor, which would break the loop anywhere it's convenient. So the instant you punch it, for a split second you'd loose the 48, before the other 12 comes into the mix. Simply a solenoid and a pedal switch and some cables are all you need. You'd probably have to disconnect any accessories, though they'd probably drop out on voltage drop anyway.

Just thinkin' out loud here, before the coffee's kicked in, but I think if you sketch it up, it should work.
I think I see....so what you are saying is that the boost battery has to be in series with the others to achive the 60v and wiring it directly to the controller would not give me 60v.

Suggestions on which contactor I should use and where to get it?
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Unread 05-15-2012, 08:48 AM   #23
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Default Re: OK, I've been thinking again......

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Originally Posted by TerryH View Post
I think I see....so what you are saying is that the boost battery has to be in series with the others to achive the 60v and wiring it directly to the controller would not give me 60v.

Suggestions on which contactor I should use and where to get it?
Look at EV drives, get the SW202, Carl has it in a 48 or 72 volt config. They are not cheap, I know.....
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Unread 05-15-2012, 10:02 AM   #24
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Default Re: OK, I've been thinking again......

The problem i see with this is, this is like unhooking your battery cable, and hooking it back up with out flipping the tow/run switch, and everyone know's that, when you do that on a PDS cart, you can fry the controller, now don't quote me on this, iv'e never done this, just thinking out loud. but it's some thing to think about.





Quote:
Originally Posted by yurtle View Post
You'd have to break the series of batteries in order to insert another one in the loop. So you'd need a double pole double throw contactor, which would break the loop anywhere it's convenient. So the instant you punch it, for a split second you'd loose the 48, before the other 12 comes into the mix. Simply a solenoid and a pedal switch and some cables are all you need. You'd probably have to disconnect any accessories, though they'd probably drop out on voltage drop anyway.

Just thinkin' out loud here, before the coffee's kicked in, but I think if you sketch it up, it should work.
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Unread 05-15-2012, 10:06 AM   #25
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Default Re: OK, I've been thinking again......

Quote:
Originally Posted by rib33024 View Post
The problem i see with this is, this is like unhooking your battery cable, and hooking it back up with out flipping the tow/run switch, and everyone know's that, when you do that on a PDS cart, you can fry the controller, now don't quote me on this, iv'e never done this, just thinking out loud. but it's some thing to think about.
hmmmmmmmm....
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Unread 05-15-2012, 06:15 PM   #26
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Wink Re: OK, I've been thinking again......

Well as I stated before a 400 amp contactor with the 48 hooked to one side and the 60 volts hooked to other side.

Drive the cart one time around the house then stop! Swap the contactor to 60 volts and you should be good.
This doesn't get you the kick in like just hitting a switch but you can see what the extra volts does.
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Unread 05-15-2012, 06:54 PM   #27
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Default Re: OK, I've been thinking again......

Quote:
Originally Posted by Andy4639 View Post
Well as I stated before a 400 amp contactor with the 48 hooked to one side and the 60 volts hooked to other side.

Drive the cart one time around the house then stop! Swap the contactor to 60 volts and you should be good.
This doesn't get you the kick in like just hitting a switch but you can see what the extra volts does.
I see how to do it now but I still don't see how that's going to be under 60 volts. Both the pack and the boost battery would have to be really low for the combination not to be over 60 volts at rest.
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Unread 05-15-2012, 08:33 PM   #28
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Cool Re: OK, I've been thinking again......

I was going by what you said in the 1st post. When you hit the pedal it goes down way below 48 volts so if you get the surface charge down before engaging it may work.
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Unread 05-21-2012, 09:56 PM   #29
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Default Re: OK, I've been thinking again......

Terry come on in the waters fine.


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Unread 05-21-2012, 10:00 PM   #30
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Default Re: OK, I've been thinking again......

That's not fair Kelly!
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