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Unread 03-14-2014, 01:36 PM   #1
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Default 1991 ezgo controller upgrade

I'm looking for the different options for a new controller. I have already purchased the upgraded fr switch, selinoid, and wiring. Next up is controller and motor. I'm looking for the options on torque vs speed and if the controller makes as much of a difference as the motor.
Thanks for any input.


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Unread 03-14-2014, 02:33 PM   #2
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Default Re: 1991 ezgo controller upgrade

The motor consumes amperage to produce torque. The more amperage it can consume the more torque or power it can produce. Think of the speed controller as a gate valve in a water system. Having a small valve will limit how much amperage can flow at any given time.
Think of the cables as pipes. It's easy to see that the biggest motor in the world won't get the job done if it hasn't got access to enough amperage.

Most people use a 500 amp control when upgrading this cart. Only the biggest aftermarket motors require more than that. A 500 or 700 amp GE control is available and it is a bolt in replacement.
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Unread 03-14-2014, 10:21 PM   #3
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So I'm assuming the DC motor makes more of a difference as too torque vs speed. The controller only controls amperage as not to put full power through the motor at all times. Upgraded controller will not hurt the factory motor correct.


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Unread 03-14-2014, 10:27 PM   #4
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Default Re: 1991 ezgo controller upgrade

Kramer, there are a lot of people that are running stock motors with upgraded controllers, as a matter of fact, there are a lot of people that have upgraded from 36v to 48v and are still running stock motors. so to answer your question.....NO an upgraded controller will not hurt your factory motor.
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Unread 03-14-2014, 10:27 PM   #5
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Default Re: 1991 ezgo controller upgrade

oh and btw...... Welcome to our happy little corner of the net, and to BGW. There is a BIG fridge on the back porch with anything you can think of in it...help yourself...of course only take what you can LEGALLY have. Make yourself at home on one of the big fluffy couches, kick your shoes off, put your feet up on one of the tables, yes we are allowed to do that, mom's, wive's, husbands, girlfirends and boyfriends here don't care....and take it easy.



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Unread 03-14-2014, 11:10 PM   #6
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Thanks
any model controller anyone would prefer?


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Unread 03-14-2014, 11:26 PM   #7
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Default Re: 1991 ezgo controller upgrade

Not to hijack this, but Sir Nuke, are you saying the controller takes in 48v from the batteries and puts out 36 to the motor? Is this on a shunt motor or a series?

Thanks
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Unread 03-15-2014, 10:49 AM   #8
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Default Re: 1991 ezgo controller upgrade

Quote:
Originally Posted by gonesouth View Post
Not to hijack this, but Sir Nuke, are you saying the controller takes in 48v from the batteries and puts out 36 to the motor? Is this on a shunt motor or a series?

Thanks
what I am saying is......if you were to upgrade you entire system from 36v to 48v.....you would not have to replace the motor. as the stock motor will work and handle the 48v.
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Unread 03-15-2014, 04:11 PM   #9
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Default Re: 1991 ezgo controller upgrade

There are limits to the amperage a stock motor can consume. Given a direct connection it would consume itself to death - quickly. The controller limits access. The stock series motor shouldn't have access to more than 500a and a Sepex motor 400a. Of course moderation & right foot judgement are key to motor longevity. These are general guidelines which can be misleading when misunderstood.
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Unread 03-15-2014, 05:27 PM   #10
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Default Re: 1991 ezgo controller upgrade

FWIW,
I ran my stock 36 volt motor at 48 volt and 500 amps. A motor only "consumes" as many amps as it needs to perform a certain task. Even when climbing a steep hill with four (including me) passengers, mine only went above 400 amps briefly.

If I ran it wide open non-stop, it would overheat.

Heat is what kills a motor, not voltage or amps. Amps generally result in heat, more than voltage. More voltage gives you more speed with less amps.
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