How is robot motor calculated?
Torque * rps > = Mass * Acceleration * Velocity / (2 * pi)
- To use this equation, look up a set of motors you think will work for your robot and write down the torque and rps (rotations per second) for each.
- Then multiply the two numbers together for each.
- Next, estimate the weight of your robot.
How do you calculate motor requirements?
The required torque is calculated by multiplying the sum of load torque and acceleration torque by the safety factor. When the required torque for the motor varies over time, determine if the motor can be used by calculating the effective load torque.
How do you calculate electric motor power?
By taking the voltage and multiplying it by the associated current, the power can be determined. A watt (W) is a unit of power defined as one Joule per second. For a DC source the calculation is simply the voltage times the current: W = V x A.
How to calculate the correct motor size for a robot?
For use in a robot drivetrain, you determine your gear ratio by choosing a target speed and gearing it to be slightly faster at the no-load RPM. So (in real life) with a load, you run close to the peak efficiency point. One great resource can be found at Ask Aaron.
How to calculate the wheel rotation speed of a robot?
Summarizing all the values: It is quite easy to calculate the needed wheel rotation speed. All you need is wheel diameter and the nominal robot speed. Let us assume a wheel diameter of 85mm, and calculate wheel rotation speed: If we omit friction, we can estimate the motor torque needed to climb on the previously specified maximum slope.
How do you calculate the force of an electric motor?
The force/acceleration calculation from the previous section can be reused by making friction = 1 for positive engagement. All you need is the motor torque and length of your lever arm to determine what force can be lifted. Then, take advantage of the fact that, with electric motors, speed and torque are inversely proportional.
How to calculate correct motor size and torque?
Let’s say we have a 4-inch diameter wheel we want spinning at 600RPM with the CIM motor. What force can we generate from this with a coefficient of friction of 0.9 (roughly rubber on steel or wood)? We will assume we are just starting to move so rpm = 0 and torque = 2.41 N*m.