No Torque on low speed hoverboard motor controled with arduino and ZS-X11H

Projects Programming
1

Hello all, i have problem that i cant fix or i dont know how thats why im here. So i have hoverboard motor motor controller and arduino, i want to control forward and backwards motor with low speed with key fob, i made everything and everything works good except for torque, i can stop motor with my hand and sometimes it wont start, all this i show in video i uploded.. take a look guys and let me know where is problem..

my code is simple:

const int rm1 = 13;   ///Ide na senzor
const int rm2 = 8;   ///Ide na senzor
const int pwm = 3;   ///Ide na Driver za pwm
const int dir = 7;  ///Ide na Driver za direkciju

void setup(){
  Serial.begin(115200);
  pinMode(dir, OUTPUT);

}

 
void loop(){
 

  while (digitalRead(13) == LOW && digitalRead(8) == LOW) {
    analogWrite(pwm, 0);

  }  
  
  
  while (digitalRead(13) == HIGH) {  // Dugme za zatvaranje
    analogWrite(pwm, 20);
    digitalWrite(dir, false);
  }

  while (digitalRead(8) == HIGH) {  // Dugme za otvaranje
   analogWrite(pwm, 20);
   digitalWrite(dir, true);
 }


}
2

Why did you post in one of the Covid-19 support categories of the forum ?

I have moved your topic to the Programming Questions category

Please be more careful when starting new topics

3

sry my mistake, didnt notice i did that..

4

More torque requires more voltage to the motor. Low speed means limiting the average current by pulsing the current. Schematic or block diagram, please!

5

yeah sure:

image
image1724×830 102 KB

6

Thanks for the block diagram. Did your system also have low torque when it was a still a hover board?

7

oh i dont know that since i bought used hoverboard with bad battery and i dont even know how to drive it so i didnt even try it.. could be motor problem>?

8

I am sure the builder's lawyers advised to minimize liability, limit torque! Remember, you have human being on board.

9

what is your suggestion to do?

10

Have you tried any number higher than 20 as the parameter passed to analogWrite()?

Currently the motor is only receiving power for less than 8% of the time.

11

Use a controller that matches your requirements.

12

can you suggest any? kinda dont know what to look for..

13

No suggestions. Look for three-phase DC motor speed controls.

14

yes i did try, but speed is higher and i dont need that much of a speed, thats why is tricky for me.. i need low speed but to have torque

15

DC motors operate on current, noto voltage. Voltage is simply a means of controlling current. Motor torque is proportional to motor current. Getting high torque REQUIRES high current, regardless of speed. Having slow motion WITH high torque implies the presence of a high load. The only reasonable to achieve the kind of control you need is with a properly tuned PID controller, which controls either position or speed, and with provide whatever current the motor requires to achieve the desired position or speed. Simply varying PWM value based on desired position or speed will NOT work.

16

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