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A Study On Motor Control And Magnetic Levitation Control For Flywheel Battery

Posted on:2008-10-29Degree:MasterType:Thesis
Country:ChinaCandidate:G Q ShiFull Text:PDF
GTID:2132360242466160Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
Fly wheel energy storage system (FESS) is a new and efficient battery, which is innocent to the environment. The drive motor control and magnetic levitation control are two key techniques to improve the performance of the FESS. The dissertation design the permanent brushless DC motors control system and single-axisdegree-of-freedom bearing control system based on DSP.A double closed-loop scheme (current loop and speed loop) is adopted in thepermanent brushless DC motors control system. The system hardware includes the three-phase inverter, the driving circuit, the protection circuit, the position detecting circuit, the current detecting circuit and the periphery circuit of DSP. The system software has been designed to realize the control strategy, which includes the main, A/D sampling, current regulation, speed calculation, speed regulation and capture interruption subroutine. By comparing experimental results from the DSP-based control system and the analog circuit control system, it can be concluded that the control system based on DSP has the advantages of high reliability, low noise, easily upgrading and realizing advanced control strategies.Single-axis degree-of-freedom bearing control system use a new type of hybrid magnetic bearing made up of electromagnet and permanent magnet. The system hardware and software has been designed to realize a stable levitation. The experiment results show that compared with the traditional electromagnetic bearing, hybrid magnetic bearing has the advantages of simple structure, small control power, low cost of controller, easy to achieve and so on.
Keywords/Search Tags:Flywheel Energy Storage System, Permanent Magnet Brushless DC Motors, DSP, Magnetic Bearing
PDF Full Text Request
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