- Fri Jun 12, 2020 2:39 pm
#43624
Naidu resistors try to adjust the VR air conditioner.
LAV1000 wrote: ↑Thu Jun 11, 2020 3:38 pmI have not yet found any resistors of lower resistance, resistors R11,12 have soldered from the board. Without resistors, the motor works very poorly at speeds above 5000. At the moment, the motor works fine without using a VR air conditioner.Dmitriy wrote: ↑Thu Jun 11, 2020 9:05 amThe problem is, there are so many VR sensors each whit its own characteristics.LAV1000 wrote: ↑Wed Jun 10, 2020 9:35 pm Dmitry,How is the resistance of these resistors calculated?
The resistors R10 and R12 are parrallel to the the VR sensor and are there to get the voltage down from the vr sensor especial at higher rpm's
You might try to fit a bigger resistor.
The voltage generated by the sensor is 3-5V. It is possible that at high speeds it is higher, but I definitely don’t know.
You need to see them as small generators each whit its own Voltage and Current range.
So voltage and current output depends on how fast your trigger wheel is turning and how many teeth it has.
Trigger wheel 36-1 turns out more voltage than a 18-1 at the same rpm.
Now to "tune" the sensor they are using resistors.
If you make the load higher, les resistance, than the voltage wil drop.
But if you make this load to big then then there isn't enough voltage to run the low rpm's.
Now for you need to find a good value for your set up
Hence the word "tuning".
R10 and R12 are 4,7kOhm at the moment, try a few values below it like 3.9-3.3-2.7-2.2 kOhm
Naidu resistors try to adjust the VR air conditioner.