scholarly journals Light-load efficiency improving boost converter with the hybrid modulation of hysteresis current mode and burst mode

2019 ◽  
Vol 16 (11) ◽  
pp. 20190108-20190108
Author(s):  
Runyun Miao ◽  
Changchun Chai ◽  
Yuqian Liu ◽  
Hui Li ◽  
Yintang Yang
Keyword(s):  
Current Mode ◽  
Boost Converter ◽  
Burst Mode ◽  
Hybrid Modulation ◽  
Light Load

scholarly journals A ZVS Bidirectional Inverting Buck-Boost Converter Using Coupled Inductors

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 221 ◽  
Author(s):  
Xu-Feng Cheng ◽  
Yong Zhang ◽  
Chengliang Yin
Keyword(s):  
Storage System ◽  
Core Loss ◽  
Current Mode ◽  
Energy Storage System ◽  
Boost Converter ◽  
Experimental Results ◽  
Switching Loss ◽  
Zero Voltage Switching ◽  
Coupled Inductors ◽  
Light Load

The bidirectional inverting buck-boost converter (BIBBC) has a simple structure and a wide voltage ratio. It can be used in the battery supercapacitor hybrid energy storage system (BSHESS) and the motor drive system. However, the traditional continuous conduction mode (CCM) BIBBC will have severe switching loss. The triangular current mode (TCM) BIBBC can reduce the switching loss, but it will increase core loss and filter capacitance. To solve these problems, this paper proposes a new zero voltage switching (ZVS) BIBBC using a coupled inductor. This ZVS BIBBC will provide ZVS conditions for both transistors whether in positive operation or negative operation. Meanwhile, this ZVS BIBBC has small core losses and filter capacitance, and can be used simply. Finally, experimental results obtained from these BIBBC experimental prototypes are presented to validate the soft-switching achieving and the efficiency improvement performance. Experimental results show that both transistors of the ZVS BIBBC achieve ZVS turn-on conditions. The efficiency of the ZVS BIBBC increased by up to 10 percent compared to the traditional CCM BIBBC at heave load, and by up to 1.5 percent compared to the TCM BIBBC at a light load.

Operation Region Selector Circuit to Obtain Maximum Efficiency of 250 W Boost Converter

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Riz Rifai O. Sasue ◽  
Eka Firmansyah ◽  
Suharyanto Suharyanto
Keyword(s):  
Load Condition ◽  
Current Mode ◽  
Boost Converter ◽  
Maximum Efficiency ◽  
Light Load ◽  
Zero Current Switching ◽  
Zero Current ◽  
Interleaved Boost Converter ◽  
Conduction Mode ◽  
Load Conditions

Interleaved boost converter gives good conversion efficiency due to its zero-current switching capability when operating in discontinuous conduction mode while keeping its input-output ripple current low. However, operating this kind of converter at interleaved operation for all the time gives poor efficiency under light-load condition. In this paper, an automatic operation region selector switch based on detection of the continuous or discontinuous current mode is proposed. With this switch, during the light-load condition, only one converter is activated, while during full-load condition both converters will be activated. The simulation results using LTspice software show that the proposed boost converter has a better efficiency compared to the conventional boost converter with efficiency range of 84.6 % to 95.32 % under various load conditions.

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