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Unread 03-13-2009, 12:20 AM   #11
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Default Re: about controller

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Originally Posted by toogood4ubalius79 View Post
i have a d&d motor peak 9.4 hp if that help sorry forgot to add that in first post my question is can i get more run time dropping from a 700 amp controller to a 500 amp since the 700 is a waste i use mine for hunting, and use all the torque i have now to get up some hills and speed not that important i get 16 mph on flat road with it now thanks
Okay I gotcha! Here is my analogy which makes this whole controller thing simple enough for the average guy. Think of the usable juice in the batteries(amps) as a tank of water. A finite amount with each charge. There is a hose (cables) and a gate valve (controller) going to the motor The motor DRAWS amperage(or water from the tank) Now this draw varies from motor to motor depending upon HP etc. Delivery of the water is limited by the size of the gate valve (controller) and of course the size and condition of the hose( cables) Got it? A too big controller wastes nothing but the extra purchase price!
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Unread 03-13-2009, 12:30 AM   #12
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Smile Re: about controller

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Originally Posted by scottyb View Post
Okay I gotcha! Here is my analogy which makes this whole controller thing simple enough for the average guy. Think of the usable juice in the batteries(amps) as a tank of water. A finite amount with each charge. There is a hose (cables) and a gate valve (controller) going to the motor The motor DRAWS amperage(or water from the tank) Now this draw varies from motor to motor depending upon HP etc. Delivery of the water is limited by the size of the gate valve (controller) and of course the size and condition of the hose( cables) Got it? A too big controller wastes nothing but the extra purchase price!
YO, Ya' got that one right on the money!!!
Can't waste it if ya can't use it... It goes back to the BIGGER is BETTER deal, 700 has to be better than 500, so I'll spend the extra dough.
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Unread 03-13-2009, 06:43 AM   #13
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Default Re: about controller

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Originally Posted by scottyb View Post
Okay I gotcha! Here is my analogy which makes this whole controller thing simple enough for the average guy. Think of the usable juice in the batteries(amps) as a tank of water. A finite amount with each charge. There is a hose (cables) and a gate valve (controller) going to the motor The motor DRAWS amperage(or water from the tank) Now this draw varies from motor to motor depending upon HP etc. Delivery of the water is limited by the size of the gate valve (controller) and of course the size and condition of the hose( cables) Got it? A too big controller wastes nothing but the extra purchase price!
Are you sure? I understand what you are saying but, if your battery pack will only put out 500 amps it dont mater how many your motor or controller can handle. There not going to make your batteries put out more if there already putting out max amps. I have been told the only way to get more amps is more batteries. Like instead of using 6 8 volt batteries. Use 8 6 volt batteries. I could be wrong this is what I was told when I bought my stuff from the guy's at D&D. They told me anything larger than 500 amps was a waste with 8 volt batteries at 48 volts. If I am wrong please tell me I would like to know also. I am here to learn as much as I can.
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Unread 03-13-2009, 07:03 AM   #14
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Default Re: about controller

Kdawg, you got your info right..... some people believe bigger is better. But like a weak link in a stout chain; You can only deliver as many amps as you have as fast as the system can draw though the point of greatest resriction and yes there are more amps in eight 6 volts which will translate to longer run time also.
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Unread 03-13-2009, 08:04 AM   #15
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Default Re: about controller

cool
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Unread 03-13-2009, 09:25 AM   #16
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Default Re: about controller

If the statement is true that the max you can get from a 48 Volt pack is 500 Amp.
Then if you have a 700 Amp controller running 500 Amps or a 500 Amp running 500 Amp
the amperage usage would be the same ! so go figure.
Here is a chart for GE motors with 36 and 48 Volt and different controllers.
Hope it helps !
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Unread 03-13-2009, 11:30 AM   #17
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Default Re: about controller

kdawg is the rear end in your buggy stock? and what size tires on it
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Unread 03-13-2009, 12:11 PM   #18
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Default Re: about controller

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kdawg is the rear end in your buggy stock? and what size tires on it

The rear end is stock but, the cart has a 6 inch spindle lift on the front and lift blocks on the rear axle. Tires are 23x10x10
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Unread 03-13-2009, 12:28 PM   #19
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Default Re: about controller

I believe a battery pack can deliver much more then 500 AMPs since many single 12 volt batteries have cranking amps well over that amount alone. What ScottyB just stated is correct in the fact that it doesn't matter what the battery pack can deliver, it's what the entire setup can accept and or deliver. Cranking over a typical automobile engine takes between 150 to 250 amps alone from a 12 volt battery but it's usually for only 30 second intervals.
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Unread 03-13-2009, 03:11 PM   #20
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Default Re: about controller

thanks you guys so the outcome is that i am wasting some run time with my setup thanks in advance
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