alsmith
100 kW
gave it to my brother to carry in his car
I just received my unit from Banggood. It's the blue colored (less expensive) one. It clearly says 12V on the front of the box and on one of the Chinese language pieces of paper inside...although on the side of the box it says 48-60V and there is a sticker on top of the box with the SKU that also says 48-60V. Inside the power connector is the 12V car cigarette lighter type.alsmith said:OK, just been offered a refund from banggood, I guess it's an admittance that it's a 12V item. I think it will go to my brother as an emergency option for his car (but I AM tempted to put 48V through it ....)
So back to the original hunt for a cheap emergency compressor...
I have to say that I'm reasonably happy with Bangggood but a little disappointed/annoyed too. When I originally contacted them about the problem I included pictures clearly showing the problems yet they mustn't read the initial messages because they asked for a video of the problem. All I did in response was ask what a video would show that they didn't already have, added a couple of extra bits of mildly sarcastic captions, and say if they really did want the video what was the extra things that they wanted me to show that the pictures didn't have.
alsmith said:I have to say that I'm reasonably happy with Bangggood but a little disappointed/annoyed too. When I originally contacted them about the problem I included pictures clearly showing the problems yet they mustn't read the initial messages because they asked for a video of the problem. All I did in response was ask what a video would show that they didn't already have, added a couple of extra bits of mildly sarcastic captions, and say if they really did want the video what was the extra things that they wanted me to show that the pictures didn't have.
Running a 12v motor on 48v will fry the motor as would running a 36v motor on 4 times the voltage / 144v = fryAlan B said:I would test it at 12V, that should be safe. I would expect a 48V unit to severely underperform at 12V.
There's no guarantee of that, even with a brushed motor (like these)--it depends on the load and the gearing. If you were to change the gearing of these units so the "12v" version running at 48v drove the pump at the same speed (hence the same load to the motor), it'd probably still work, other than the extra brush wear from the higher voltage, and one other thing for brushed motors:eCue said:Running a 12v motor on 48v will fry the motor as would running a 36v motor on 4 times the voltage / 144v = fry
No..no markings on the blue casetomjasz said:Is the motor marked in the blue case like the black case?
dilkes said:No..no markings on the blue casetomjasz said:Is the motor marked in the blue case like the black case?
Well..I plugged it into my 12V car cigarette lighter and it seemed to run fine at 12V. I am guessing it would fry at 48V. In any case, I am going thru the process with Banggood (photos, etc.) to see about a refund or replacement. If I have to I will disassemble and see about any clues inside.alsmith said:dilkes said:No..no markings on the blue casetomjasz said:Is the motor marked in the blue case like the black case?
You'll need to open the case to see if a voltage is printed on the motor, or if that diode mentioned earlier is present.
dilkes said:Well..I plugged it into my 12V car cigarette lighter and it seemed to run fine at 12V. I am guessing it would fry at 48V. In any case, I am going thru the process with Banggood (photos, etc.) to see about a refund or replacement. If I have to I will disassemble and see about any clues inside.alsmith said:dilkes said:No..no markings on the blue casetomjasz said:Is the motor marked in the blue case like the black case?
You'll need to open the case to see if a voltage is printed on the motor, or if that diode mentioned earlier is present.
So I did open the case and there is no diode and the motor is clearly marked 12V (picture attached). I don't particularly want to send this picture to Banggood as I suppose they might claim that opening it voids the warranty. However I will keep after them for replacement or refund.tomjasz said:dilkes said:Well..I plugged it into my 12V car cigarette lighter and it seemed to run fine at 12V. I am guessing it would fry at 48V. In any case, I am going thru the process with Banggood (photos, etc.) to see about a refund or replacement. If I have to I will disassemble and see about any clues inside.alsmith said:dilkes said:No..no markings on the blue case
You'll need to open the case to see if a voltage is printed on the motor, or if that diode mentioned earlier is present.
No big deal to open up and look, it may be marked and save you time!
Is that a picture of one in the blue case? or the black case?Addy said:48V air compressor.jpg
I ordered and received the 48V version of this pump. The box was marked 48V and the motor is also marked 48V internally. This unit has the diode. I tested it on my bike's 48V battery and it works well.
dilkes said:Is that a picture of one in the blue case? or the black case?
Here's mine again and it runs at 12V. I am reluctant to try it at 48V as the motor is stamped 12V.amberwolf said:Also interesting is that if you look at the few pictures posted in this thread that show the gearing, the 12v unit (just one that I can see) uses the largest gear on the motor, and the smallest on the pump, while the 48v units do the opposite.
So the motors may all be the same, and just the gearing is different.
If everyone with an openable case would post a pic of their gearing, and post the voltage it runs on, it would be interesting to see how many this is the case with.
amberwolf said:Then in your case it's the motor wound for 12v, cuz it has the small gear on the motor, so it couldn't just get geared down for 48v.