A Study on Loop Gain Measurement Method Using Output Impedance in DC-DC Buck Converter

2018 ◽  
Vol E101.B (9) ◽  
pp. 1940-1948 ◽  
Author(s):  
Nobukazu TSUKIJI ◽  
Yasunori KOBORI ◽  
Haruo KOBAYASHI
Keyword(s):  
Measurement Method ◽  
Buck Converter ◽  
Loop Gain ◽  
Output Impedance ◽  
Gain Measurement

scholarly journals Stability Analysis and Optimal Design for Virtual Impedance of 48 V Server Power System for Data Center Applications

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5253
Author(s):  
Chien-Chun Huang ◽  
Sheng-Li Yao ◽  
Huang-Jen Chiu
Keyword(s):  
Open Loop ◽  
Buck Converter ◽  
Output Impedance ◽  
Signal Model ◽  
Passive Components ◽  
The Past ◽  
Feedback Compensation ◽  
Series Systems ◽  
The Relationship ◽  
Virtual Impedance

In the past literature on virtual impedance to series systems, most of the discussion focused on stability without in-depth research on the system design of the series converter and the overall output impedance. Accordingly, this study takes an open-loop resonant LLC converter series-connected closed-loop Buck converter as an example. First, the conditions required for the direct connection of the small-signal model in the series, the effect of feedback compensation on the input impedance of the load stage, the operating frequency, and passive components of the two-stage converter are discussed in detail―the relationship between the matching and the output impedance. Afterwards, a mathematical model is used to discuss the effect of adding parallel virtual impedance on the output impedance of the overall series converter and then derive an optimized virtual impedance design. Finally, an experimental platform of 48 V to 12 V and maximum wattage of 96 W are implemented. The output impedance of the series converter is measured with an impedance analyzer to verify the theoretical analysis proposed in this paper.

scholarly journals On the One-Antenna Gain Measurement Method in Probe Station Environment at mm-Wave Frequencies

2019 ◽  
Vol 68 (11) ◽  
pp. 4510-4517 ◽  
Author(s):  
Jianfang Zheng ◽  
Juha Ala-Laurinaho ◽  
Antti V. Raisanen
Keyword(s):  
Measurement Method ◽  
Antenna Gain ◽  
Gain Measurement ◽  
The One

A simpler reference antenna gain measurement method

2018 ◽  
Vol 60 (8) ◽  
pp. 1937-1940 ◽  
Author(s):  
Krishnasamy T. Selvan ◽  
Satish K. Sharma ◽  
Ghanshyam Mishra ◽  
Roshin Rose George
Keyword(s):  
Measurement Method ◽  
Antenna Gain ◽  
Gain Measurement

scholarly journals Control Design and Loop Gain Analysis of DC-to-DC Converters Intended for General Load Subsystems

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Syam Kumar Pidaparthy ◽  
Byungcho Choi
Keyword(s):  
Control Design ◽  
Current Mode ◽  
Graphical Analysis ◽  
Buck Converter ◽  
Analysis Method ◽  
Loop Gain ◽  
Inductive Load ◽  
Load Impedance ◽  
Impedance Characteristics ◽  
Actual Load

DC-to-DC converters are usually intended for general applications where the load impedance characteristics are unknown or undefined. This paper establishes the control design procedures for DC-to-DC converters in the absence of any prior knowledge on their load impedance. The proposed control design can be universally adapted to all the DC-to-DC converters regardless of the impedance characteristics of their actual load. This paper also presents the loop gain analysis of the converter combined with an actual load whose impedance characteristics are only available afterward. A graphical analysis method is proposed, which enables us to predict the loop gain of the converter in the presence of an arbitrary load impedance. The validity of the analysis method is demonstrated using a current-mode controlled buck converter coupled with an inductive load, capacitive load, and converter load. Theoretical predictions are verified with both computer simulations and experimental measurements.

scholarly journals Multiphase Current-Controlled Buck Converter With Energy Recycling Output Impedance Correction Circuit (OICC)

2015 ◽  
Vol 30 (9) ◽  
pp. 5207-5222 ◽  
Author(s):  
Vladimir Svikovic ◽  
Jorge J. Cortes ◽  
Pedro Alou ◽  
Jesus A. Oliver ◽  
Oscar Garcia ◽  
...  
Keyword(s):  
Buck Converter ◽  
Output Impedance
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