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A DSP-based variable AC power source
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DOI：10.1109/19.744655.png)
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Abstract
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This paper presents the development of a single-phase ac power source. The power source described in this paper 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.
Keywords:
digital signal processors
discrete-time system
power supplies
pulsewidth modulated inverters
variable-structure systems
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