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A DSP-based variable AC power source

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1 Author(s)
Kay-Soon Low ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore

This paper presents the development of a single-phase AC power source. The power source described is capable of providing a stable AC voltage with variable amplitude and variable frequency over a wide range. Moreover, it can generate various high-quality low-frequency arbitrary waveforms. This is achieved by applying advanced digital control techniques to perform closed-loop control of the single-phase inverter used in the circuit. In this system, a high-performance digital signal processor has been used to realize the discrete-time sliding-mode control strategy. This leads to a system that is robust with respect to system parameter variations and external disturbances. Consequently, high-quality output waveforms can be maintained despite dynamic loading conditions. Some experimental results are demonstrated

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Instrumentation and Measurement, IEEE Transactions on  (Volume:47 ,  Issue: 4 )