How can this work??

[JohnnieB]

Originally Posted by mardad

Cart ran like a spotted a**ed ape after we bypassed reed switch. He's been running over a year with this set-up so he obviously has been charging. He has a charger, just didn't bring it with the cart. He was retired from T.I. and told me manufacturers of solid state stuff say "you can't do this or that" but you actually can. I was just curious if anybody here had run into this before.

If T.I. stands for Texas Instruments, he may have the knowledge and skills needed to adapt a 36V, 42V or 48V charger to charge a 40V pack.

I seem to remember that the open circuit voltage applied to the diodes in a old 36V ferroresonant transformer type charger is 90VAC. The control board shuts the charger off at about 45VDC (2.5VPC x 18 Cells), but adjusting, modifying or tricking the control board into shut off at 50VDC (2.5VPC x 20 Cells) is doable.

If you happen to talk to him again, suggest he joins BGW. Sounds like he would fit in well.

[marianol]

Originally Posted by mardad

The cart is gone. Fixed it while it was on the trailer. If he comes back in I will investigate further, but for now, I'm racking my brain trying to figger out how this could work. Talked to a guy @ EZGO and he laughed and said.... "if it aint broke, don't try to fix it.

Well with 40 volts it will work and you have proof; the questions become:
- for how long ?
- And how do I charge this monster ?

[mardad]

Originally Posted by JohnnieB

If T.I. stands for Texas Instruments, he may have the knowledge and skills needed to adapt a 36V, 42V or 48V charger to charge a 40V pack.

I seem to remember that the open circuit voltage applied to the diodes in a old 36V ferroresonant transformer type charger is 90VAC. The control board shuts the charger off at about 45VDC (2.5VPC x 18 Cells), but adjusting, modifying or tricking the control board into shut off at 50VDC (2.5VPC x 20 Cells) is doable.

If you happen to talk to him again, suggest he joins BGW. Sounds like he would fit in well.

Yes. Texas Instruments. If I see him again I'm gonna "bleed him out".(figuratively speaking). The way he "talked" reminded me of the way you "write", JohnnieB.

[JohnnieB]

Originally Posted by mardad

The cart is gone. Fixed it while it was on the trailer. If he comes back in I will investigate further, but for now, I'm racking my brain trying to figger out how this could work. Talked to a guy @ EZGO and he laughed and said.... "if it aint broke, don't try to fix it.

He's only running about 11% over the nominal voltage for the stock controller and stock solenoid, so while it is likely a fun while it lasts situation, I suspect the solenoid is the less tolerant of over voltage and will die first.

[Revolution]

Originally Posted by JohnnieB

He's only running about 11% over the nominal voltage for the stock controller and stock solenoid, so while it is likely a fun while it lasts situation, I suspect the solenoid is the less tolerant of over voltage and will die first.

A correctly sized resistor could keep it happy right?

[JohnnieB]

Originally Posted by Revolution

A correctly sized resistor could keep it happy right?

Yes, but mardad probably would have spotted it.