Solar tracker calculation of torques and forces

In summary, the conversation discusses designing a solar tracker for a final year project. It is a dual axis tracker with two stepper motors, one rotating a shaft and the other tilting a bar. The individual is seeking help with calculating forces, torques, and finding the FOS. They mention the importance of considering all possible resistance to motion in order to properly size the motors and gear trains.
  • #1
vassos_ael
4
0
hi

i am designing a solar tracker for my final year project. its a dual axis solar tracker with two stepper motors one rotating a shaft and the other tilting a bar. i need help on calculating forces torques and finding the FOS. can anyone help me?
 

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  • #2
You said "final year", didn't you? This is basic statics & dynamics analysis.
F = ma
T = Jα

Should be sized for maximum acceleration (increase from speed1 to speed2, then reverse to stop). Include every possible resistance to motion you can dream up (friction, gravity effects, efficiencies, any & all inertia effects) in order to size for "peak torque" on the rotational axes. Once you have that, then you size your motors, gear trains, etc., to match.
 

1. How is the torque calculated for a solar tracker?

The torque for a solar tracker is calculated by multiplying the force applied to the tracker by the distance between the force and the axis of rotation. This distance is known as the moment arm and is measured in meters. The resulting unit for torque is Newton-meters (Nm).

2. What forces need to be considered in the calculation of a solar tracker's torque?

There are three main forces that need to be considered in the calculation of a solar tracker's torque: the weight of the tracker, the wind load, and the solar panel's weight. Each of these forces will have a different moment arm and direction, and they must be accounted for in the calculation.

3. How does the angle of the sun affect the torque calculation for a solar tracker?

The angle of the sun can have a significant impact on the torque calculation for a solar tracker. When the sun is directly overhead, there is no torque required to keep the tracker in position. However, as the sun moves to the horizon, the torque required to maintain the tracker's position increases. This is because the moment arm between the force of the sun and the axis of rotation becomes longer.

4. What is the importance of torque and force calculations in solar tracker design?

Accurate torque and force calculations are essential in the design of a solar tracker. These calculations ensure that the tracker is able to withstand the forces it will experience and remain stable and functional. They also help in determining the appropriate size and strength of the tracker's components, such as motors and gears.

5. Are there any software programs or tools available to assist with solar tracker torque and force calculations?

Yes, there are several software programs and tools available to assist with solar tracker torque and force calculations. These include specialized engineering software, such as SolidWorks or ANSYS, as well as online calculators and spreadsheets. It is important to ensure that the inputs and assumptions used in these tools are accurate for the specific solar tracker design.

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