A novel current-assisted output voltage control technique for switch-mode-rectifier converters

1992 ◽  
Vol 7 (3) ◽  
pp. 444-452 ◽  
Author(s):  
L.D. Salazar ◽  
P.D. Ziogas
Keyword(s):  
Output Voltage ◽  
Voltage Control ◽  
Control Technique ◽  
Switch Mode

Low-Power Fast-Settling Low-Dropout Regulator Using a Digitally Assisted Voltage Accelerator for DVFS Application

2013 ◽  
Vol 284-287 ◽  
pp. 2526-2530
Author(s):  
Wei Ben Yang ◽  
Chi Hsiung Wang ◽  
Hsiang Hsiung Chang ◽  
Ming Hao Hong ◽  
Jsung Mo Shen
Keyword(s):  
Low Power ◽  
Output Voltage ◽  
Voltage Control ◽  
Control Unit ◽  
Settling Time ◽  
Control Technique ◽  
Dynamic Voltage ◽  
Low Dropout Regulator ◽  
Ldo Regulator ◽  
Fast Settling

This paper presents a low-power fast-settling low-dropout regulator (LDO) using a digitally assisted voltage accelerator. Using the selectable-voltage control technique and digitally assisted voltage accelerator significantly improves the transition response time within output voltage switched. The proposed LDO regulator uses the selectable-voltage control technique to provide two selectable-voltage outputs of 2.5 V and 1.8 V. Using the digitally assisted voltage accelerator when the output voltage is switched reduces the settling time. The simulation results show that the settling time of the proposed LDO regulator is significantly reduced from 4.2 ms to 15.5 μs. Moreover, the selectable-voltage control unit and the digitally assisted voltage accelerator of the proposed LDO regulator consume only 0.54 mW under a load current of 100 mA. Therefore, the proposed LDO regulator is suitable for low-power dynamic voltage and frequency-scaling applications.

scholarly journals Power Quality Analysis of the Output Voltage of AC Voltage and Frequency Controllers Realized with Various Voltage Control Techniques

2021 ◽  
Vol 11 (2) ◽  
pp. 538
Author(s):  
Naveed Ashraf ◽  
Ghulam Abbas ◽  
Rabeh Abbassi ◽  
Houssem Jerbi
Keyword(s):  
Power Quality ◽  
Output Voltage ◽  
Frequency Control ◽  
Voltage Control ◽  
Voltage Regulation ◽  
Quality Analysis ◽  
Control Technique ◽  
Control Techniques ◽  
Power Quality Analysis ◽  
Selection Of

Single-phase and three-phase AC-AC converters are employed in variable speed drive, induction heating systems, and grid voltage compensation. They are direct frequency and voltage controllers having no intermediate power conversion stage. The frequency controllers govern the output frequency (low or high) in discrete steps as per the requirements. The voltage controllers only regulate the RMS value of the output voltage. The output voltage regulation is achieved on the basis of the various voltage control techniques such as phase-angle, on-off cycle, and pulse-width modulation (PWM) control. The power quality of the output voltage is directly linked with its control techniques. Voltage controllers implemented with a simple control technique have large harmonics in their output voltage. Different control techniques have various harmonics profiles in the spectrum of the output voltage. Traditionally, the evaluation of power quality concerns is based on the simulation platform. The validity of the simulated values depends on the selection of the period of a waveform. Any deficiency in the selection of the period leads to incorrect results. A mathematical analytical approach can tackle this issue. This becomes important to analytically analyze the harmonious contents generated by various switching control algorithms for the output voltage so that these results can be successfully used for power quality analysis and filtering of harmonics components through various harmonics suppression techniques. Therefore, this research is focused on the analytical computation of the harmonics coefficients in the output voltage realized through the various voltage and frequency control techniques. The mathematically computed results are validated with the simulation and experimental results.

New output voltage control technique using dynamic model for quantum series resonant convertor

1991 ◽  
Vol 27 (6) ◽  
pp. 545 ◽  
Author(s):  
S.S. Hong ◽  
J.H. Ko ◽  
K.Y. Cho ◽  
D.S. Oh ◽  
M.J. Yoon
Keyword(s):  
Dynamic Model ◽  
Output Voltage ◽  
Voltage Control ◽  
Control Technique ◽  
Series Resonant

scholarly journals Hybrid-modulation-based control technique for reduction of output voltage ripples in frequency-modulated switch-mode power converters

2018 ◽  
Vol 9 (3) ◽  
pp. 1272
Author(s):  
Deniss Stepins ◽  
Jin Huang ◽  
Janis Audze
Keyword(s):  
Output Voltage ◽  
Power Converters ◽  
Control Technique ◽  
Duty Ratio ◽  
Modulation Scheme ◽  
Switching Frequency ◽  
Hybrid Modulation ◽  
Straightforward Application ◽  
Switch Mode ◽  
Electromagnetic Emissions

<span>In this paper a novel control technique for switching-frequency-modulated switch-mode power converters (SMPC) operating in discontinuous conduction mode is proposed. The use of the technique leads to significant reduction in peak-to-peak output voltage and peak currents increased due to straightforward application of switching frequency modulation (SFM). The technique is based on hybrid modulation scheme in which both switching frequency and duty ratio are modulated simultaneously by the same modulation signal. Theoretical analysis and experimental verification of the proposed technique are presented in details. Both computer simulations and experiments show that switching-frequency-modulated SMPC with the proposed control technique in comparison to SMPC without SFM has appreaciably lower conducted electromagnetic emissions, at the cost of slightly increased peak-to-peak output voltage and peak currents.</span>

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