1 of my drivers is hot to touch.
- Thread starter diggs99
- Start date
ChiefRunningPhist
Well-Known Member
Was your Vo POT maxed?
ChiefRunningPhist
Well-Known Member
Put positive multimeter probe in 200mA multimeter hole instead of 10A multimeter hole. Then rotate the multimeter selection dial on the multimeter to the 200V DC selection, the V with the straight line, not the wavy line, then just touch your multimeter probes to each of the terminal blocks, 1 on positive 1 on negative.
My multi has the "COM" or negative on the far left, I think yours is in the middle, but your 200mA hole will be the hole that's not the 10A hole, and not the "COM" hole.
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diggs99
Well-Known Member
Ya thats what i did for the terminal block side, but not sure for the wagos , what am i gonna touch with the probes? do i need to try and get the probes in the same wago ports that the driver lead wires are in?
ChiefRunningPhist
Well-Known Member
Yep that will work
diggs99
Well-Known Member
yes this was with vo pot maxed out
just redid it a second time to make sure, same reading, 45.0 @ 10.30a
Now both drivers are equally as hot/warm but one driver is still making that sound i dont like. Its like i can hear the electricity flowing through the leads coming from driver....i dunno lol
diggs99
Well-Known Member
ok ill try that, my wagos are in a project box, but tightly fit lol
ChiefRunningPhist
Well-Known Member
The drivers utilize a step down transformer and in the link I posted it talks about the coil humming at certain Hz from the coils not being dampened/insulated with hotglue or some other product, ect. They vibrate enough to make a whining noise that picks up in pitch as you increase the load, typically. Im throwing a guess in the dark here that the excess heat is from an improperly timed SR and the body diodes are flowing the current, I'm guessing also that the Hz is too low or the coil is louder than others.
Generally speaking, if the AC side of both drivers measure the same wattage when both drivers are pushing the same V·A, then I think it's just a noisy coil, but if the AC side of the whiny driver pulls more wattage than the quiet driver, when they are both outputting the same, then I think there's some malfunction in your secondary side switching. You're already noticing a difference in temp so I'm leaning towards faulty driver and less so a lone noisy coil but these are just guesses, I really don't have a clue lol, we can at least determine the effeciency of each driver which could then give you insight to possible things but that's about all I can come up with rn.
ChiefRunningPhist
Well-Known Member
Your multimeter has to be able to detect PF. If it doesn't you won't be able to tell the input wattage. The kill-a-watt meters detect PF, and Hz too.
AC wattage = VAC × A × PF
You could test the V·A of each. Youd just select the multimeter dial to the AC voltage side (wavy line) and then stick your probes into the socket. Whatever your socket is at is what your driver is getting.
AC wattage = VAC × A × PF
You could test the V·A of each. Youd just select the multimeter dial to the AC voltage side (wavy line) and then stick your probes into the socket. Whatever your socket is at is what your driver is getting.
diggs99
Well-Known Member
Based on the numbers or that noise?
Since i ran the tests and set both up exactly the same, both drivers are running the same numbers and same heat @ 10.3a and 45.0v ....should both be running better than that?
Im still so green behind the ears with this stuff, im not sure whats good and whats not.
whytewidow
Well-Known Member
Those drivers should hit 49.8vdc max not 45.
