lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric Yamaha
Electric Yamaha Electric Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



Post New Thread  Reply
 
Thread Tools Display Modes
Old 07-26-2017, 11:00 PM   #1
rockfordpi
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 1,056
Default Motor HOT, motor or Controller issue?

About 2 months ago, I put a 420 amp Navitas TSX 2.0 controller with OTF module on a friend's G29. Stock controller was definitely bad. Could have been my imagination, but the cart seemed a little slow even with OTF turned all the way up.

Now the solenoid has failed. I benched checked it and it still clicks, but no continuity. Obviously contacts are burned up. Initially it was clicking on the cart, even after contacts failed. At the end, I think (not 100% sure) it even it stopped clicking all together.

Installed a new SW180 solenoid. New solenoid does not click. Has proper voltage on control wire input. Obviously no ground. When I jumper over from solenoid direct to ground, solenoid clicks.

I was leaning to controller failure, then I happened to notice a tiny amount of smoke coming up from motor. After only a brief time, motor was hot, not so hot I could not touch, but could only touch it about 2 seconds before it burned me. Accelerator was never pressed after I got the solenoid click.

I think this explains why the original solenoid contacts were burned up. I am wondering if this could have also gotten the original controller? Or, has the new controller simply failed and is applying the wrong or partial voltage to the motor?

Does not seem like it could be the motor since there should not have been any current applied to the motor before the accelerator was pushed?

All suggestions, ideas and comments are appreciated.
rockfordpi is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Old 07-27-2017, 06:08 AM   #2
Golf cart guy
Gone Wild
 
Golf cart guy's Avatar
 
Join Date: May 2015
Location: Central Florida
Posts: 2,117
Default Re: Motor HOT, motor or Controller issue?

On any controller failure, a cause should always be looked for other than just saying the controller failed. This being a Yamaha, a shorted or damaged motor should always be suspect. I think this is why so many have issues with rebuild controllers failing.

Check everything out at this point to make sure you don't have a major short.
Golf cart guy is offline   Reply With Quote
Old 07-27-2017, 09:00 AM   #3
rockfordpi
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 1,056
Default Re: Motor HOT, motor or Controller issue?

Quote:
Originally Posted by Golf cart guy View Post
On any controller failure, a cause should always be looked for other than just saying the controller failed. This being a Yamaha, a shorted or damaged motor should always be suspect. I think this is why so many have issues with rebuild controllers failing.

Check everything out at this point to make sure you don't have a major short.
Just to be clear, when the solenoid closes there should be some power from the controller to the motor even before the accelerator is pressed?
rockfordpi is offline   Reply With Quote
Old 07-27-2017, 03:00 PM   #4
Golf cart guy
Gone Wild
 
Golf cart guy's Avatar
 
Join Date: May 2015
Location: Central Florida
Posts: 2,117
Default Re: Motor HOT, motor or Controller issue?

power to the motor would try and make the cart run.

Does reverse buzzer work? Controller controls that, so bad controller many times youll have no reverse buzzer either.
Golf cart guy is offline   Reply With Quote
Old 07-27-2017, 08:38 PM   #5
rockfordpi
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 1,056
Default Re: Motor HOT, motor or Controller issue?

Quote:
Originally Posted by Golf cart guy View Post
power to the motor would try and make the cart run.

Does reverse buzzer work? Controller controls that, so bad controller many times youll have no reverse buzzer either.
Buzzer does not work, but it may have been broken before.

Back to my original confusion about your first answer. I understand that power to the motor is what makes the cart run, my question is should there be power to the motor BEFORE the accelerator is pressed as is happening per above?
rockfordpi is offline   Reply With Quote
Old 07-27-2017, 10:22 PM   #6
cgtech
Over This Interview Is...
 
cgtech's Avatar
Yamaha
 
Join Date: Jun 2012
Location: AZ
Posts: 17,449
Default Re: Motor HOT, motor or Controller issue?

There should be B- at the motor, but not B+.
cgtech is offline   Reply With Quote
Old 07-27-2017, 10:40 PM   #7
rockfordpi
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 1,056
Default Re: Motor HOT, motor or Controller issue?

Quote:
Originally Posted by cgtech View Post
There should be B- at the motor, but not B+.
With the Navitas controller, I think it is changed to where B+ is always at the motor (you cut the Y cable and move to B+ controller terminal when you put in Navitas controller) when solenoid is engaged.

I think the Navitas Controller then closes the loop back to B-. So, either some way the motor is somehow shorted to B- and heats up when solenoid is closed, or the controller is providing a closed circuit back to B-.

It seems l like if the controller were proving that circuit back to B-, then the overload would kick out before the motor started smoking.

So, now I am leaning back to a motor issue, but I am still perplexed. It seems like this would need TWO shorts for it to cause the motor to get hot.
rockfordpi is offline   Reply With Quote
Old 07-28-2017, 09:45 AM   #8
cgtech
Over This Interview Is...
 
cgtech's Avatar
Yamaha
 
Join Date: Jun 2012
Location: AZ
Posts: 17,449
Default Re: Motor HOT, motor or Controller issue?

Aha! Never used a Navitas, so thanks for the info.
cgtech is offline   Reply With Quote
Old 07-28-2017, 11:22 AM   #9
rockfordpi
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 1,056
Default Re: Motor HOT, motor or Controller issue?

Quote:
Originally Posted by cgtech View Post
Aha! Never used a Navitas, so thanks for the info.
Ok, got it narrowed down. When I remove EITHER or BOTH F1 and F2 from the controller, turning the key on makes the solenoid engage and reverse buzzer beep.

When BOTH F1 and F2 are connected, solenoid does not close, buzzer does not beep. I am guessing controller is sensing a problem in the field coil and shutting down.

1 ohm resistance between f1 and f2.

This seems like it has to be a motor issue. Any chance it could be just the brushes or is it time to throw in the towel and buy another motor?
rockfordpi is offline   Reply With Quote
Old 07-28-2017, 12:30 PM   #10
cgtech
Over This Interview Is...
 
cgtech's Avatar
Yamaha
 
Join Date: Jun 2012
Location: AZ
Posts: 17,449
Default Re: Motor HOT, motor or Controller issue?

On a sepex cart, the field circuit does not touch the brushes (it better not, or bye bye Controller). And 1 ohm is not necessarily a bad field reading. Most ohm meters are not too accurate in the 1 ohm area and below. I would expect something around 1.5 ohm, but like I said about the typical inaccuracies in "low ohm" readings.
cgtech is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric Yamaha


Thread Tools
Display Modes


Similar Threads
Thread Forum
NOS Curtis 275A controller, 36/48v motor, 72v Shunt motor Golf Carts and Parts
Motor or controller issue. Cart kind of stalls on take off. Electric EZGO
Motor Issue Columbia ParCar
99 txt motor issue Gas EZGO
Motor controller and Motor match? Electric Club Car


All times are GMT -5. The time now is 01:13 AM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This Website and forum is the property of Buggiesgonewild.com. No material may be taken or duplicated in part or full without prior written consent of the owners of buggiesgonewild.com. © 2006-2017 Buggiesgonewild.com. All rights reserved.