scholarly journals An Overview of Fully Integrated Switching Power Converters Based on Switched-Capacitor versus Inductive Approach and Their Advanced Control Aspects

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3250
Author(s):  
G Kiran Kumar ◽  
Tarakanath Kobaku ◽  
Subham Sahoo ◽  
Bidyadhar Subudhi ◽  
Devaraj Elangovan ◽  
...  
Keyword(s):  
Frequency Modulation ◽  
Power Converters ◽  
Pulse Frequency ◽  
Drop Out ◽  
Switching Frequency ◽  
Switched Capacitor ◽  
Pulse Frequency Modulation ◽  
Fully Integrated ◽  
Switching Power ◽  
Switching Power Converters

This paper reviews and discusses the state of the art of integrated switched-capacitor and integrated inductive power converters and provides a perspective on progress towards the realization of efficient and fully integrated DC–DC power conversion. A comparative assessment has been presented to review the salient features in the utilization of transistor technology between the switched-capacitor and switched inductor converter-based approaches. First, applications that drive the need for integrated switching power converters are introduced, and further implementation issues to be addressed also are discussed. Second, different control and modulation strategies applied to integrated switched-capacitor (voltage conversion ratio control, duty cycle control, switching frequency modulation, Ron modulation, and series low drop out) and inductive converters (pulse width modulation and pulse frequency modulation) are then discussed. Finally, a complete set of integrated power converters are related in terms of their conditions and operation metrics, thereby allowing a categorization to provide the suitability of converter technologies.

A Frequency Domain Approach for Controlling Fast-Scale Instabilities in Switching Power Converters

2015 ◽  
Vol 25 (11) ◽  
pp. 1550141 ◽  
Author(s):  
E. Rodriguez ◽  
E. Alarcón ◽  
H. H. C. Iu ◽  
A. El Aroudi
Keyword(s):  
Frequency Domain ◽  
Power Converters ◽  
Notch Filter ◽  
Switching Frequency ◽  
Stability Range ◽  
Stability Margins ◽  
Switching Power ◽  
Switching Power Converters ◽  
Domain Transfer ◽  
Frequency Domain Approach

This paper deals with controllers of fast-scale instabilities in DC–DC switching power converters from a frequency domain standpoint with the aim of understanding their working principle and hence simplifying their design. Some approaches for controlling fast-scale instabilities and their limitations are revisited. Considering the frequency domain transfer function of already existing controllers, a simple and extended notch filter centered at half of the switching frequency is proposed to avoid these instabilities. However, a switching converter under this controller may still exhibit the undesired slow-scale instability. Accordingly, the paper explores an alternative approach based on amplifying the harmonic at the switching frequency. Numerical simulations show that the new proposed controller can concurrently improve both fast-scale and slow-scale stability margins. The results from the different controllers are contrasted in terms of stability boundaries, indicating that the last one presents a wider stability range.

Analysis and Performance Evaluation of Control Methods for LLC Resonant Converter

2018 ◽  
Vol 15 (2) ◽  
pp. 685-689
Author(s):  
Soundiraraj Nallasamy ◽  
Rajasekaran Vairamani
Keyword(s):  
Frequency Modulation ◽  
Short Circuit ◽  
Load Condition ◽  
Pulse Frequency ◽  
Open Loop ◽  
Resonant Circuit ◽  
Frequency Variation ◽  
Switching Frequency ◽  
Pulse Frequency Modulation ◽  
Tank Circuit

An LLC resonant dc to dc converter in the company of an LC ant resonant tank circuit for civilizing the act of pulse frequency modulation (PFM) is projected in this manuscript. The planned converter, known as LLC-LC converter, can expand a voltage guideline area below the unity gain with a lesser frequency variation of Pulse frequency modulation by the effect of the antiresonant tank. This beneficial possessions contribute for shielding over current in the case of the short-circuit load condition as well as the bring into being interval in the planned band of switching frequency. The circuit topology and working theory of the planned converter is described, subsequent to the design method of the working frequency and circuit parameters are offered. The performance of the soft switch and the steady-state pulse frequency modulation distinctiveness of the LLC-LC converter are evaluated underneath the open-loop control in conduct experiment of a 2.0-kiloWatts trial product, and its real effectiveness is compared with an LLC converter model. Intended for enlightening the usefulness of the LLC-LC resonant circuit, voltages and currents of the series and ant resonant tanks are analyzed, correspondingly, with state-plane trajectory based on computation and experimentation, where by the power and energy of resonant tank is verified. To conclude, the possibility of the projected converter is evaluate from the realistic point of vision.

Demonstration of 6-bit, 0.20-mVpp Quasi-Triangle Voltage Waveform Generator Based on Pulse-Frequency Modulation

2014 ◽  
Vol E97.C (3) ◽  
pp. 194-197 ◽  
Author(s):  
Yoshitaka TAKAHASHI ◽  
Hiroshi SHIMADA ◽  
Masaaki MAEZAWA ◽  
Yoshinao MIZUGAKI
Keyword(s):  
Frequency Modulation ◽  
Pulse Frequency ◽  
Waveform Generator ◽  
Voltage Waveform ◽  
Pulse Frequency Modulation
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