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This paper proposes a new way based on FPGA to realize decoupled double synchronous reference frame software phase locked loop (DDSRF-SPLL) under unbalanced conditions. DDSRF-SPLL can lock in unbalanced grid voltage accurately as well as overcome the impact of the phase-locked loop on frequency performance in adopting the positive and negative sequence decoupling algorithm. When the frequency of three-phase...
A new control method based on State-Dependent Ricatti Equation(SDRE) control for DC-DC converter with FPGA based hardware controller is proposed. Deadbeat control is one effective digital control approach, and the robustness for the variation of the system parameter is the key issue. Some approaches were proposed, for exsample, a single-rate deadbeat control with disturbance observer, a multi-rate...
A novel single phase AC/AC variable frequency technology is presented, which is based on plugged pulse-chopping control scheme in this paper. The single-phase circuit topology is given, and the principle and control strategies are detailed. Compared with the traditional AC/AC variable frequency technology, its structure and control are simpler and cost is lower. Simulation under the PSPICE environment...
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