scholarly journals Multi-period analysis of current-mode pulse-train controlled continuous conduction mode converter

2014 ◽  
Vol 63 (24) ◽  
pp. 248401
Author(s):  
Sha Jin ◽  
Xu Jian-Ping ◽  
Xu Li-Jun ◽  
Zhong Shu
Keyword(s):  
Pulse Train ◽  
Current Mode ◽  
Mode Converter ◽  
Period Analysis ◽  
Conduction Mode ◽  
Continuous Conduction Mode

scholarly journals Fixed off Time Based Power-Factor Correction for AC-DC Converter

2020 ◽  
Vol 9 (3) ◽  
pp. 2232-2238
Keyword(s):  
Power Factor ◽  
Duty Cycle ◽  
Power Factor Correction ◽  
Current Mode ◽  
Boost Converter ◽  
Control Technique ◽  
Mode Tm ◽  
Off Time ◽  
Conduction Mode ◽  
Continuous Conduction Mode

The conversion of A.C to D.C determines the distortion of the mains current A.C., which degrades the input power factor. The main reason for a poor power factor is the non-linear nature of the circuit. In this paper power factor is improved by using a basic boost converter and a control technique based on the fixed off time(FOT) approach .The traditional approach to the correction of the power factor in the boost converter is the continuous conduction mode with fixed frequency (FF-CCM) and the transition mode (TM) PWM (fixed connection time, variable frequency). In the first mode, the inductor operates in continuous conduction mode (CCM) and uses the average current-mode control mode; a complex technique involves a considerable number of components. The second method uses the more complex control technique of the peak current mode that makes the inductor work between continuous and discontinuous mode, which uses fewer components, unstable greater than 50% duty cycle and is more cost efficient. A third approach, the fixed off time (FOT) is gaining popularity which is conditionally stable for a duty cycle of over 50% and does not need compensation. The paper work carried out to use the power factor correction (PFC) based on DC-DC Flyback converter. To verify the design and operation of the circuit, the simulation is performed in PSIM .A prototype is developed and results are presented.

scholarly journals INTERACTION OF FAST-SCALE AND SLOW-SCALE BIFURCATIONS IN CURRENT-MODE CONTROLLED DC/DC CONVERTERS

2007 ◽  
Vol 17 (05) ◽  
pp. 1609-1622 ◽  
Author(s):  
YANFENG CHEN ◽  
CHI K. TSE ◽  
SIU-CHUNG WONG ◽  
SHUI-SHENG QIU
Keyword(s):  
Current Mode ◽  
Boost Converter ◽  
Stable Region ◽  
Mode Effects ◽  
Current Mode Control ◽  
Mode Control ◽  
Different Types ◽  
Conduction Mode ◽  
Continuous Conduction Mode

This paper investigates the interaction of fast-scale and slow-scale bifurcations in the boost converter under current-mode control operating in continuous conduction mode. Effects of varying some chosen parameters on the qualitative behaviors of the system are studied in detail. Analysis is performed to identify the different types of bifurcation. Boundaries of stable region, slow-scale bifurcation region, fast-scale bifurcation region, interacting fast and slow-scale bifurcation regions are identified.

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