03-12-2015, 02:22 PM | #1 |
Not Yet Wild
Join Date: Nov 2014
Posts: 10
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IQ Precedent Controller Bypass
Hi Everyone,
I have been reading on this forum about controller bypass setups to add more voltage directly to the motor for short periods of time to increase RPM’s/speed. I have a 2008 IQ Precedent and I was wounding if this is even possible with my cart. Most of the information that I can find is for 36V Series carts. Are series carts the only ones that this will work on? Will the bypass setup work on IQ motors or will it burn it up? The thread below is the most informative one that I can find with diagrams but I was hoping that someone that has done this setup before could help answer some questions. Thanks http://www.buggiesgonewild.com/extre...r-boost-3.html |
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03-12-2015, 04:59 PM | #2 |
Getting Wild
Join Date: Feb 2013
Location: Kansas
Posts: 107
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Re: IQ Precedent Controller Bypass
Read post 119 of that thread.
with that said, this is very cool! I am willing to bet that it would work if you installed a speed magnet to turn off the regen feature of the motor. Last edited by Oneunder; 03-12-2015 at 07:09 PM.. Reason: I had more time to think about it. |
03-12-2015, 07:50 PM | #3 |
Not Yet Wild
Join Date: Nov 2014
Posts: 10
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Re: IQ Precedent Controller Bypass
Thanks for the advise Oneunder. I went back and saw the post that roady89 made about it not working on regen carts but no one in the post elaborated as to why it wouldn't work. So u think if the regen braking is removed then the motor would act more like a series motor and the bypass is possible? Can you or any other members on the forum think of any other problems besides back flow to the controller that could occur on an IQ doing this bypass?
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03-12-2015, 08:48 PM | #4 |
......................
Join Date: Apr 2009
Location: FT Lauderdale FL.
Posts: 16,416
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Re: IQ Precedent Controller Bypass
Two total different Motors,
Shunt Wound DC Motor In case of a shunt wound dc motor or more specifically shunt wound self excited dc motor, the field windings are exposed to the entire terminal voltage as they are connected in parallel to the armature winding. Series Wound DC Motor In case of a series wound self excited dc motor or simply series wound dc motor, the entire armature current flows through the field winding as its connected in series to the armature winding. The series wound self excited dc motor is diagrammatically represented below for clear understanding. |
03-12-2015, 09:01 PM | #5 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: IQ Precedent Controller Bypass
The real issue is that the specific type of shunt motor used in the IQ carts is a SEPEX or Separately Excited motor (the coils are not physically connected in parallel as the shunt picture above).
The controller for those motors is considerably more complex and they all have a "Field Weakening Map" that controls the relationship between Field Current vs Armature Current, some controllers do it at different RPMs as well. Completely by-passing those controllers will most likely fry the motor as You will never be able to maintain the correct current ratio between the motor field and armature coils. |
03-13-2015, 12:38 AM | #6 | |
Gone Wild
Join Date: Apr 2012
Location: BC Canada
Posts: 663
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Re: IQ Precedent Controller Bypass
Quote:
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03-13-2015, 06:19 AM | #7 |
Voltaholic
Join Date: Dec 2013
Location: Close to Navasota Texas
Posts: 934
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Re: IQ Precedent Controller Bypass
listen to the guys above. It will destroy your motor. I killed a perfectly good sepex motor just by changing field mapping. I was looking for more speed and changing field maps and burnt it up on the third test run.
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03-13-2015, 08:00 AM | #8 |
Getting Wild
Join Date: Feb 2013
Location: Kansas
Posts: 107
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Re: IQ Precedent Controller Bypass
So disappointing. I was already putting a parts list together and picking out a spot for my "boost" button.
What about if you did the same concept but ran the extra volts through your controller without exceeding its limits? (I have been told that the curtis can handle 72) It could serve as that extra bump of speed or "spare tank" when you needed a little extra power to get home when your pack was low? |
03-13-2015, 08:08 AM | #9 | |
Gone Wild
Join Date: Apr 2012
Location: BC Canada
Posts: 663
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Re: IQ Precedent Controller Bypass
Quote:
Just a thought, we are going to be doing something similar with one of our SVD builds, but we are taking it to another level, we wanted the same "boost" type feeling. |
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03-13-2015, 08:50 AM | #10 |
Not Yet Wild
Join Date: Nov 2014
Posts: 10
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Re: IQ Precedent Controller Bypass
Thanks for all the responses. My cart currently goes 32 MPH with a PQ Executioner, DCX500, 2 AWG wires, HD solenoid and 23" tires. The problem is that if I have 4 People on the cart I am only cruising at about 24-26 MPH. Which is still respectable but not quick enough. The cart is street legal and the area I live in allows them on 35 MPH or less streets, which is pretty much the entire barrier island I live on and I hold up too much traffic during busy weekends if I have 3-4 passengers on the back. GEM cars are becoming very popular where I live in Florida and I have seen them going close to 40 MPH with 4 people.(I assume modified). Since a boost is not possible is swapping the controller to a 72 volt system possible? All the 72 volt controllers I have seen are made for series wound motors. Thanks again.
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