RXV NEW 36v Solenoid getting hot before cart moves

[rockfordpi]

Originally Posted by Sergio

It looks like You replaced the Solenoid with the wrong Coil Duty type.

The way You guys describe the Solenoid activation it seems like it would require a "Continuous rated Coil".

The 36v "Continuous rated coil" SW181 has a 102Ω coil resistance instead of the 44Ω coil resistance of the intermittent coil type and would run a loot cooler.

Since You said the old one still has a good coil, did You measure the resistance?

Whichever voltage You choose, make sure You get a continuous rated coil version for this type of application.

Thanks, that is something about which I did not think! I keep thinking of an RXV in terms of a traditional pedal activation cart.

Scottyb tells me this solenoid is rated at 10hrs continuous at 36v. Since the RXV Solenoid holdin voltage falls to 24v, seems like it would be even longer. This thing is getting really hot in less than 20 minutes.

I am going to try a continuous duty duty Solenoid, but given the amount of time it takes this one to get hot, I am still a bit concerned something else may be going on.

[usgicollector]

Why not just order a Trombetta 36v solenoid EZGO part #609428 #608897?

[Sergio]

I am not sure if You already changed anything, but Your Hold percentage posted was 60% of 48v = 28.8v.

This is the spec sheet for that SW181 Solenoid:

http://www.albrightinternational.com...onic-Issue.pdf

As You can see, the intermittent rated coil has a must pull-in voltage of around 24v (60% of 36v) and a release voltage around 10v (20% of 36v).

You can change your Hold percentage to 40% and it should run a lot cooler.

I think the ratings ScottyB quoted must be the Thermal Contact rating and not the coil rating.

PS: The trombetta is a nice (and expensive) solenoid because it has a built-in coil economizer, You can achieve the same results using a cheaper Solenoid and the Controller built-in PWM driver features.

[rockfordpi]

Originally Posted by Sergio

I am not sure if You already changed anything, but Your Hold percentage posted was 60% of 48v = 28.8v.

This is the spec sheet for that SW181 Solenoid:

http://www.albrightinternational.com...onic-Issue.pdf

As You can see, the intermittent rated coil has a must pull-in voltage of around 24v (60% of 36v) and a release voltage around 10v (20% of 36v).

You can change your Hold percentage to 40% and it should run a lot cooler.

I think the ratings ScottyB quoted must be the Thermal Contact rating and not the coil rating.

PS: The trombetta is a nice (and expensive) solenoid because it has a built-in coil economizer, You can achieve the same results using a cheaper Solenoid and the Controller built-in PWM driver features.

If it were for me, I would definitely adjust the controller settings and use what I have. However, since this is for someone else, I am probably just going to go ahead and get a continuous duty Trombetta per USGI's post above. Price is not that bad, less than $30 from well known golf cart supply house.

Does anyone know if they make a Trombetta that will mount back like the original one did with the copper bar. I can make the one with the "L" bracket in USGI's post work, but other would be easier mount.

[cgtech]

Ezgo still sells the stock type with the stock bracket, I think their msrp is just over $30.

[rockfordpi]

Originally Posted by cgtech

Ezgo still sells the stock type with the stock bracket, I think their msrp is just over $30.

I am guessing it may have been this one,

https://shop.txtsv.com/heavy-duty-36...r-electric-rxv

but no pic and is confusing because it says for 2009-2014 and I thought the dannaher controller used the one with the L bracket.

[hot-shot]

My 2019 RXV solenoid also gets very hot when cart is at rest with the key on. Also if you notice there is a label on the solenoid cover that reads hot.