Design of a new three-degree of freedom spherical motor for photovoltaic-tracking systems

Öner, Yusuf; Cetin, Engin; Öztürk, Harun Kemal; Yılancı, Ahmet

doi:10.1016/j.renene.2009.04.025

Cited by 46 publications

(15 citation statements)

References 6 publications

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“…Two-axis solar trackers follow the sun's visible motion anywhere in the world with a trajectory in vertical and horizontal axes. Two-axis solar trackers are more accurate in pointing the sun, but as there are two actuators to be controlled, the number of controlled variables increases causing a more complex control system, both hardware and software [8,9]. This paper presents an optimized control algorithm for the two-axis sun trackers that can be executed in an ARM based 32-bit microcontroller to specify the optimal trajectories for the tracking system.…”

Section: Advances In Mechanical Engineeringmentioning

confidence: 99%

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Optimization Controller for Mechatronic Sun Tracking System to Improve Performance

Engin

2013

Advances in Mechanical Engineering

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An embedded system that contains hardware and software was developed for two-axis solar tracking system to improve photovoltaic panel utilization. The hardware section of the embedded system consists of a 32-bit ARM core microcontroller, motor driver circuits, a motion control unit, pyranometer, GPS receiver, and an anemometer. The real-time control algorithm enables the solar tracker to operate automatically without external control as a stand-alone system, combining the advantages of the open-loop and the closed-loop control methods. The pyranometer is employed to continuously send radiation data to the controller if the measured radiation is above the lower radiation limit the photovoltaic panel can generate power, guaranteeing the solar tracking process to be highly efficient. The anemometer is utilized in the system to ensure that the solar tracking procedure halts under high wind speed conditions to protect the entire system. Latitude, longitude, altitude, date, and real-time clock data are provided by GPS receiver. The algorithm calculates solar time using astronomical equations with GPS data and converts it to pulse-width modulated motor control signal. The overall objective of this study is to develop a control algorithm that improves performance and reliability of the two-axis solar tracker, focusing on optimization of the controller board, drive hardware, and software.

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Section: Advances In Mechanical Engineeringmentioning

confidence: 99%

“…The developed sun tracking algorithm allows determination of sun angles and times for solar noon, sunrise, and sunset with high-precision year-round using (1) through (8). It takes data that contains date, time, longitude, latitude, and elevation from GPS receiver.…”

Section: Defining Elevation and Azimuth Angles Trajectoriesmentioning

confidence: 99%

Optimization Controller for Mechatronic Sun Tracking System to Improve Performance

Engin

2013

Advances in Mechanical Engineering

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“…Current requirements encompasses basically an optimized construction process, simple and accurate positioning control system, large surface of motion, and high torque in the moving axis [15,[25][26][27][28][29]. The possible uses for this type of motor are difficult to list, but in the literature it is possible to find applications in microsatellite control, 3D camera systems (e.g., for simulations of the ballistic movements of the human eye), prosthetics systems for wrists and joints, and in many industrial assembly tools [7,8,16,22,[30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Design and Control of a Three-Coil Permanent Magnet Spherical Motor

et al. 2018

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Abstract:The permanent magnet (PM) spherical motor has been subject to growing interest from the scientific community due to its potential for applications in distinct areas, particularly in robotics, prosthetics, satellite control, sensors or camera systems. Motivated by this movement, the current work presents all the steps for the efficient design and construction of a spherical motor model, using compound deposition technology with the aid of a 3D printer. Furthermore, we report comprehensive studies on the accuracy of the positioning system of the proposed motor using only three stator coils, which jointly act to move the rotor axis toward any point in the hemisphere. Unmodeled nonlinear phenomena, such as friction, impair accurate positioning of the motor actuator, but this is solved by means of a visual servo control system, which allows the user to collect input-output data to train an artificial neural network model. Details on the construction of the proposed motor are reported, in addition to the numerical results of the positioning control in tracking a desired trajectory.

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“…Dual axis solar trackers have both a vertical and a horizontal axis allowing them to track the sun's apparent motion virtually anywhere in the world. Dual axis solar trackers are more accurate in pointing the sun, but as there are two actuators to be controlled, the number of controlled variables increases causing a more complex control system, both hardware and software [5,6]. This paper presents a control strategy for a two axis solar tracker that is executed in an ARM based 32 bit microcontroller.…”

Section: Introductionmentioning

confidence: 99%

Optimization mechatronic sun tracking system controller's for improving performance

Engin

2013

2013 IEEE International Conference on Mechatronics and Automation

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The overall objective of this study is to develop a control algorithm that improves performance and reliability of the two-axis solar tracker, focusing on optimization of the controller board, drive hardware and software. An embedded two-axis solar tracking system and real-time control algorithm was developed for improving photovoltaic panel utilization. The system consists of a microcontroller, two motor-control modules, two DC motors, feedback devices, and other sensors needed for robust operation. The real-time control algorithm enables the solar tracker to be used as a stand-alone system, which can operate automatically without external control. The system combines two different control methods: the open-loop method and the closed-loop method. An experimental prototype was built and field results have proven the good performance of the developed tracking system.

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Design of a new three-degree of freedom spherical motor for photovoltaic-tracking systems

Cited by 46 publications

References 6 publications

Optimization Controller for Mechatronic Sun Tracking System to Improve Performance

Optimization Controller for Mechatronic Sun Tracking System to Improve Performance

Design and Control of a Three-Coil Permanent Magnet Spherical Motor

Optimization mechatronic sun tracking system controller's for improving performance

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