lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO
Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



Post New Thread  Reply
Thread Tools Display Modes
Unread 06-13-2019, 06:04 PM   #1
Not Yet Wild
 
Join Date: Jun 2019
Posts: 9
Default Solenoid question

I have a industrial 875 36 volt. Replacing welded solenoid. Wondering what diode I need as the old one broke. The one for the two big studs. Or is that a pre charge resistor? Thanks
Sudsmcduff 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
   
Unread 06-13-2019, 06:07 PM   #2
go to cartsunlimited.net
 
scottyb's Avatar
E-Z-GO
 
Join Date: Dec 2007
Location: Southern California
Posts: 68,345
Default Re: Solenoid question

The pre charge resistor goes on the big studs. Use 10w 250-275 ohms Ω for 36v.
The suppression diode goes on the small terminals. Use 1000v 1-3 amp for 36v.
scottyb is online now   Reply With Quote
Unread 06-13-2019, 06:35 PM   #3
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
Default Re: Solenoid question

Quote:
Originally Posted by Sudsmcduff View Post
I have a industrial 875 36 volt. Replacing welded solenoid. Wondering what diode I need as the old one broke. The one for the two big studs. Or is that a pre charge resistor? Thanks
I'll give ya one of each. Just pay shipping. Here:

Ya gotta post one more time, then at 25 minutes after the hour, you can PM me and give me your name and address. It's not really worth it for you to PayPal, so, consider it free.
Attached Images
File Type: jpg IMG_1669.jpg (216.1 KB, 0 views)
yurtle is offline   Reply With Quote
Unread 06-13-2019, 06:48 PM   #4
Not Yet Wild
 
Join Date: Jun 2019
Posts: 9
Default Re: Solenoid question

Quote:
Originally Posted by yurtle View Post
I'll give ya one of each. Just pay shipping. Here:

Ya gotta post one more time, then at 25 minutes after the hour, you can PM me and give me your name and address. It's not really worth it for you to PayPal, so, consider it free.
Thanks man
Sudsmcduff is offline   Reply With Quote
Unread 06-14-2019, 07:52 AM   #5
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
Default Re: Solenoid question

Package sent.
yurtle is offline   Reply With Quote
Unread 06-24-2019, 07:57 AM   #6
Not Yet Wild
 
Join Date: Jun 2019
Posts: 15
Default Re: Solenoid question

What are these for? My precharge resistor broke and my suppression diode looks to be cut.
jpoarch is offline   Reply With Quote
Unread 06-24-2019, 03:36 PM   #7
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 15,557
Default Re: Solenoid question

Quote:
Originally Posted by jpoarch View Post
What are these for? My precharge resistor broke and my suppression diode looks to be cut.
Precharge resistor: Reduces the amount of arcing and pitting of the solenoids contacts. The controller contains several filter capacitors and if discharged, they will try to draw hundreds of amps the instant the solenoid contacts close. Problem is that solenoid contact don't close and stay closed instantly, they bounce a few times first, so you get arcing.

For safety reasons, the filter capacitors have have a bleeder network that will completely discharge them withing a few minutes of battery being disconnected (solenoid contacts opened). The precharge resistor bridges the solenoid contacts and keeps the filter capacitors charged almost to the battery pack voltage, so the inrush of amps through the closing solenoid contacts is minimized.

Suppression diode: The solenoid coil is a strong electromagnet. When the circuit that energizes it is broken, the magnetic filed collapses and by doing so a strong pulse of electric energy in the opposite polarity is generated and causes arcing at whichever set of switch contacts opened to de-energize the solenoid's coil. The diode routes the spike back into the coil rather than into the solenoid activation circuit.

The pedal switch is the switch that usually breaks the circuit, and its contacts are rather puny, so the diode extends the pedal switches useful lifespan.
JohnnieB is offline   Reply With Quote
Unread 06-24-2019, 08:54 PM   #8
Gone Mad
E-Z-GO
 
Join Date: Oct 2009
Location: Buford, GA
Posts: 8,988
Default Re: Solenoid question

Quote:
Originally Posted by JohnnieB View Post
Precharge resistor: Reduces the amount of arcing and pitting of the solenoids contacts. The controller contains several filter capacitors and if discharged, they will try to draw hundreds of amps the instant the solenoid contacts close. Problem is that solenoid contact don't close and stay closed instantly, they bounce a few times first, so you get arcing.

For safety reasons, the filter capacitors have have a bleeder network that will completely discharge them withing a few minutes of battery being disconnected (solenoid contacts opened). The precharge resistor bridges the solenoid contacts and keeps the filter capacitors charged almost to the battery pack voltage, so the inrush of amps through the closing solenoid contacts is minimized.

Suppression diode: The solenoid coil is a strong electromagnet. When the circuit that energizes it is broken, the magnetic filed collapses and by doing so a strong pulse of electric energy in the opposite polarity is generated and causes arcing at whichever set of switch contacts opened to de-energize the solenoid's coil. The diode routes the spike back into the coil rather than into the solenoid activation circuit.

The pedal switch is the switch that usually breaks the circuit, and its contacts are rather puny, so the diode extends the pedal switches useful lifespan.
Not thousands? Seriously...
yurtle is offline   Reply With Quote
Unread 06-25-2019, 12:51 PM   #9
Techno-Nerd
 
JohnnieB's Avatar
E-Z-GO
 
Join Date: Jun 2011
Location: West Virginia
Posts: 15,557
Default Re: Solenoid question

Quote:
Originally Posted by yurtle View Post
Not thousands? Seriously...
Theoretically, a completely discharged capacitor will try to draw an infinite number of amps, but the actual amp draw will be limited the resistance of the amp delivery circuit and the amp source's ability to produce amps.

I'm not sure if the instantaneous peak amp output of a deep-cycle lead-acid battery pack is in the thousands, so I went with hundreds.
JohnnieB is offline   Reply With Quote
Unread 07-26-2019, 06:51 AM   #10
Not Yet Wild
 
Join Date: Jul 2019
Location: DE
Posts: 16
Default Re: Solenoid question

Quote:
Originally Posted by scottyb View Post
The pre charge resistor goes on the big studs. Use 10w 250-275 ohms Ω for 36v.
The suppression diode goes on the small terminals. Use 1000v 1-3 amp for 36v.
So what size resistor and diode would I need for a 48 volt setup?

Still trying to figure everything out for a rebuild.
Mblaze001 is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO


Thread Tools
Display Modes


Similar Threads
Thread Forum
solenoid question Gas Club Car
Question about my solenoid Gas Club Car
please help w/solenoid question Gas Yamaha
Solenoid Question Electric Club Car
Solenoid Question Electric EZGO


All times are GMT -5. The time now is 10:24 PM.


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

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.