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Non-isolated single-inductor three-port converters (SI-TPCs) are the cost-effective way to connect the renewable source, energy-stored component and load for those stand-alone applications without isolation requirements. However, the dynamic features of SI-TPCs are complicated due to the multiport, bidirectional energy flowing and a variety of energy management modes. To facilitate the control-loop...
This paper designs and implements a high-voltage DC power supply with wide-range output voltage up to 30kV. There are two stages for the power conversion. The pre-stage circuit is a transition-mode (TM) power factor correction (PFC) converter for improving input power factor and providing a regulated 380V DC output. The post-stage is a DC/DC converter, to use a buck-type current-fed push-pull as its...
This paper extends the original complementary pulsewidth modulation concept and proposes an improved dual-output dc–dc converter, in which one output branch gets the pulsewidths and is regulated by the duty cycle, while the other output branch gets the complementary pulsewidths and is regulated by the pulse-frequency modulation. The improved converter preserves all the advantages of its original version:...
This paper presents the continuous-conduction-mode charge-pump power-factor-correction (CCM CP-PFC) electronic ballast with DC-bus voltage stress reduction function. The CP-PFC techniques are widely applied to the electronic ballasts in order to achieve high power factor. However, the DC-bus voltage at preheat or ignition mode is higher than that at steady-state operation, which causes high voltage...
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