Average Small-Signal Modelling of the Power Stage of Power Factor Correctors with a Fast Output-Voltage Feedback Loop

2009 ◽  
Author(s):  
Javier Sebastian ◽  
Diego G. Lamar ◽  
Marta Maria Hernando ◽  
Miguel Rodriguez ◽  
Arturo Fernandez
Keyword(s):  
Power Factor ◽  
Output Voltage ◽  
Feedback Loop ◽  
Small Signal ◽  
Power Stage ◽  
Voltage Feedback ◽  
Signal Modelling

Study of the Power Factor Correctors with fast output-voltage feedback loop

2008 ◽  
Author(s):  
Javier Sebastian ◽  
Diego G. Lamar ◽  
Manuel Arias ◽  
Miguel Rodriguez ◽  
Alberto Rodriguez
Keyword(s):  
Power Factor ◽  
Output Voltage ◽  
Feedback Loop ◽  
Voltage Feedback

scholarly journals A New Buck-Boost AC/DC Converter with Two-Terminal Output Voltage for DC Nano-Grid

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3808 ◽  
Author(s):  
Xiangkun Li ◽  
Weimin Wu ◽  
Houqing Wang ◽  
Ning Gao ◽  
Henry Shu-hung Chung ◽  
...  
Keyword(s):  
Steady State ◽  
Output Voltage ◽  
Operating Principle ◽  
Small Signal ◽  
Grid System ◽  
Power Sources ◽  
Steady State Analysis ◽  
Dc Power ◽  
Signal Modelling ◽  
Conduction Mode

Due to the development and deployment of renewable DC power sources and their inherent advantages for DC loads in applications, the DC nano-grid has attracted more and more research attentions; especially the topologies of AC/DC converters are increasingly studied. When designing an AC to DC converter for a DC nano-grid system, the grounding configuration, which determines the costs, the efficiency as well as the safety, plays an important role. A three-terminal output AC to DC converter based on united grounding configuration has been presented for DC nano-grid. However, it has to be pointed out that the three-terminal output DC nano-grid is not as popular as the two-terminal DC output one, due to the infrastructure consideration. This paper proposes a new Buck-Boost AC to DC converter with two-terminal output voltage for DC nano-grid. The operating principle, the steady-state analysis, and the small signal modelling for the proposed converter working in continuous conduction mode are presented in detail. A 220 V/50 Hz/800 W prototype was fabricated to verify the effectiveness of the proposed converter.

scholarly journals A novel filter for three-phase power factor correction voltage feedback loop under heavy DC voltage ripple condition

2021 ◽  
Vol 70 (9&10) ◽  
pp. 156
Author(s):  
Long Yingwen ◽  
Sun Yuhong
Keyword(s):  
Power Factor ◽  
Feedback Loop ◽  
Power Factor Correction ◽  
Input Current ◽  
Current Feedback ◽  
Dc Voltage ◽  
Voltage Ripple ◽  
Three Phase ◽  
Bus Voltage ◽  
Voltage Feedback

THD and the amplitude balance of three-phase input current are an important index for the performance of three-phase power factor correction (PFC). In general, when the hardware and the load of three-phase PFC are confirmed, the THD and amplitude balance of three-phase input current mainly depend on voltage and current feedback loop of PFC. Firstly, this paper designs the traditional voltage and current feedback loop for three-phase PFC according to traditional small signal theory. Secondly, this paper studies the designing difficulty of large dc voltage ripple for PFC voltage controller and puts forward a new dc voltage ripple filter which can eliminate the ac component of sampling dc bus voltage. Finally, this paper proposes a novel filter with dc voltage ripple frequency adaption function to copy with the frequency variety of the voltage ripple caused by the change of the output inverter frequency. With the help of the proposed algorithm the distortion of three-phase 3 input current reference decreases rapidly, therefore, the low THD and good amplitude balance of three phase input current will be achieved.

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