Distributed Torque Single Axis Solar Tracker Using Multiple Actuators
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Solution Overview
Problem
Conventional single axis solar trackers are costly due to the need for strong, heavy torque tubes and supporting structures to handle peak torque values, which increases the overall weight and expense of the system.
Innovation Solution
A distributed torque single axis solar tracking system that uses multiple actuators spaced along the torque structure to evenly distribute rotational torque, reducing the strength and size requirements of the torque structure and supporting elements, while employing actuators, damper devices, and locking mechanisms to manage torque and dynamics across the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single actuator is used to rotate the torque structure, then the system is simpler in design, but the torque structure and supporting elements must be stronger and heavier to handle peak torque values
Solution Approach 1:
The patent divides the single actuator function into multiple actuators distributed along the torque structure. Each actuator handles a portion of the total torque, segmenting the load distribution and allowing the torque structure to be lighter while maintaining structural integrity during peak torque events.
2Device complexity
If a single actuator is used to rotate the torque structure, then the system has fewer components, but the torque structure must be designed for worst-case peak torque values resulting in heavier materials
Solution Approach 1:
The supporting structure is segmented into multiple sections, each supported by intermediate posts with actuators. This segmentation allows each section to be optimized for local load conditions rather than designing the entire structure for peak torque, reducing overall material weight.
Solution Approach 2:
The patent applies local quality by placing actuators at specific intermediate positions along the torque structure where they provide localized support. This allows different sections of the structure to have different strength requirements, optimizing material usage and reducing overall weight.
3Weight of moving object
If multiple actuators are spaced along the torque structure, then torque is evenly distributed and material usage is reduced, but the device complexity increases
Solution Approach 1:
The torque structure is segmented into multiple sections with actuators distributed at intermediate positions. This segmentation enables even torque distribution across all actuators, reducing the weight requirements for each individual actuator and the overall structure.
Solution Approach 2:
The patent changes the parameter of actuator placement from a single location to multiple distributed locations along the torque structure. This parameter change enables even torque distribution and allows the system to use lighter materials while maintaining structural integrity.
4Reliability
If the torque structure is designed for peak torque values, then reliability is ensured during worst-case conditions, but the system becomes more expensive and heavier
Solution Approach 1:
The torque handling capability is segmented across multiple actuators, each responsible for a portion of the total torque. This segmentation maintains reliability during peak torque events by distributing the load, while allowing each actuator and supporting element to be designed for lower individual stress levels, reducing overall weight.
Data Source
AI summary
A distributed torque, single axis solar tracking system includes a plurality of spaced apart mounting posts with selected posts having an electrically controlled actuator mounted thereon. A torque structure extends between the actuators to distribute rotational torque on the torque structure. A plurality of solar panels is connected to the torque structure. Electrical apparatus is coupled to each actuator and designed to be coupled to a power source so that when the electrical apparatus is coupled to the power source, the plurality of actuators is energized to rotate simultaneously a desired amount. Whereby the plurality of solar panels is rotated the desired amount as the plurality of actuators rotates.