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Labview based network control of sew VSD and servomotors for solar tracking

Gazali, Gregorius (2014) Labview based network control of sew VSD and servomotors for solar tracking. Other thesis, Murdoch University.

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Renewable Energy is a clean and green energy that is readily available and can be constantly replenished. Due to increasing costs of fossil fuels and carbon tax, power generation through renewable sources is growing. Solar energy is the most chosen renewable energy that is used for power generation as it is easy to implement. However, there is a limited window of time to convert solar energy to electrical energy. Therefore applying a solar tracker that tracks the Sun’s position will increase the efficiency of the system by increasing the yield of electrical energy. This project is for educational purposes, because if the project aim was solely to track the sun position, the project can be easily completed by buying off-the-shelf microcontroller.

The Project is focused on developing a National Instrument (NI) Labview Controller that will autonomously control a dual-axis solar tracking system. SEW EURODRIVE VSD and synchronous servomotor equipment is used in this project. The NI Labview controller will work in conjunction with SEW IPOS Plus inbuilt controller in the VSD to track the position of the sun and at the same time control the position of the SEW servomotors. The Labview controller uses a chronological tracker that calculates the position of the sun through a series of complex equations. These equations result in Azimuth and Zenith angles, which will be used to continuously update the position of the Solar Tracking System. IPOS Controller will ensure that the system is a closed loop system by controlling the Speed and Position of the Synchronous Servomotors.

Bench test apparatus has been assembled to verify the function of the Solar Tracking Controller V3.0 and investigate the capabilities of the SEW MOVIDRIVE MDX61B VSD and Synchronous Servomotors. In this Project, two software applications were investigated, MOVITOOL MotionStudio and NI Labview to control the bench test. MOVITOOL is SEW propriety software and was analysed first to understand the communication between Master and Slaves. The same type of communication behaviours were then reproduced in NI Labview Software, with the aim to integrate the Chronological tracker along with the SEW Variable Speed Drive (VSD). The system communicates by using SEW MOVILINK Protocol on RS-485 based two-wire communication system.

Item Type: Thesis (Other)
Murdoch Affiliation(s): School of Engineering and Information Technology
Supervisor(s): Cole, Graeme
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