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Wind sim instant full speed and cut off of fans

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(@mehmetbaran)
New Member
Joined: 4 years ago
Posts: 2
Topic starter  

Hi,

I am having this weird issue. When i accelerate to around 30kmh, the fans go crazy to full power and shut down, after a second it goes full power again until i stop.

my hardware, arduino uno with adrafruit clon, 5300 rpm 3.3A fans (NIDEC BETA V VA450DC V34809-90 120x38 12 VDC 3.3A FAN). My power supply is 3A therefore i use only one fan for now.

 

Things i tried: 5a of power supply : i was able to increase the power for a little bit but not much.

Increase pwm : it worked well actually but still i have to decrease the power around 25. by the way, when i put the pwm to 400, it cannot start the fan until %50. 

Now, it works with 950 PWM but the speed is too slow and global gain is at %25.

 

How to solve this ? thanks

This topic was modified 4 years ago 2 times by mehmetbaran

   
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(@admin5435)
Prominent Member Admin
Joined: 7 years ago
Posts: 732
 

Hi ! 

The motor shield is rated for 1.7amps but your fan is almost the double with 3.3 amps :  https://github.com/SHWotever/SimHub/wiki/Arduino-Shake-It#adafruit-motor-shield-v2-or-clone.  

When it's overloaded the shield will overheat and internal security will simply cut power.

The monster Moto shield will allow you to hold such power (6amps max)

 


   
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