On-line fault detection of aluminium electrolytic capacitors, in step-down DC–DC converters, using input current and output voltage ripple

2012 ◽  
Vol 5 (3) ◽  
pp. 315-322 ◽  
Author(s):  
A.M.R. Amaral ◽  
A.J.M. Cardoso
Keyword(s):  
Fault Detection ◽  
Output Voltage ◽  
Input Current ◽  
Electrolytic Capacitors ◽  
Voltage Ripple ◽  
On Line ◽  
Step Down

A HIGH EFFICIENCY ADAPTIVE CURRENT MODE STEP-UP/STEP-DOWN DC–DC CONVERTER WITH FOUR MODES FOR SMOOTH TRANSITION

2014 ◽  
Vol 23 (07) ◽  
pp. 1450097 ◽  
Author(s):  
YANZHAO MA ◽  
SHAOXI WANG ◽  
SHENGBING ZHANG ◽  
XIAOYA FAN
Keyword(s):  
Transient Response ◽  
Output Voltage ◽  
High Efficiency ◽  
Current Mode ◽  
Smooth Transition ◽  
Maximum Efficiency ◽  
Cmos Process ◽  
Voltage Ripple ◽  
Transition Modes ◽  
Step Down

This paper presents a current mode step-up/step-down DC–DC converter with high efficiency, small output voltage ripple, and fast transient response. The control scheme adaptively configures the converter into the proper operation mode. The efficiency is improved by reducing the switching loss, wherein the converter operates like a buck or boost converter, and conduction loss, wherein the average inductor current is reduced in transition modes. The output voltage ripple is significantly reduced by incorporating two constant time transition modes. A fast line transient response is achieved with small overshoot and undershoot voltage. An adaptive substrate selector (ASS) is introduced to dynamically switch the substrate of PMOS power transistors to the highest on-chip voltage. A lossless self-biased current sensor with high-speed and high-accuracy is also achieved. The proposed converter was designed with a standard 0.5 μm CMOS process, and can regulate an output voltage within the input voltage ranged from 2.5 V to 5.5 V. The maximum load current is 600 mA, and the maximum efficiency is 94%. The output voltage ripple is less than 15 mV in all operation modes.

Voltage Ripple Reduction in Voltage Loop of Voltage Source Converter

2017 ◽  
Vol 8 (2) ◽  
pp. 869
Author(s):  
Jedsada Jaroenkiattrai ◽  
Viboon Chunkag
Keyword(s):  
Output Voltage ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Input Power ◽  
Input Current ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dynamical Response ◽  
Voltage Ripple ◽  
Ripple Reduction

In order to achieve a good dynamical response of a full-bridge AC-DC voltage source converters (VSC). The bandwidth of PI controller must be relatively wide. This leads to the voltage ripple produced in the control signal, as known that its ripple frequency has twice of the line frequency and cause the 3rd harmonic of an input current. A Ripple Voltage Estimator (RVE) algorithm and Feed-Forward Compensation (FFC) algorithm are proposed and added to the conventional control. The RVE algorithm estimated the ripple signal to subtract it occurring in the voltage loop. As a result, the 3rd harmonic of the input current can be reduced, and hence the Total Harmonic Distortion of input current (THDi) are improved.  In addition, the FFC algorithm will offer a better dynamical response of output voltage. The performance evaluation was conducted through the simulation and experiment at 110Vrms/50Hz of the input voltage, with a 600 W load and 250 V<sub>dc</sub> output voltage. The overall system performances are obtained as follows: the power factor at the full load is higher 0.98, the harmonic distortion at AC input power source of the converter is under control in IEC61000-3-2 class A limit, and the overall efficiency is greater than 85%.

Input-current/output-voltage ripple mitigation in the double dual boost converter

2018 ◽  
Vol 162 ◽  
pp. 150-160 ◽  
Author(s):  
J.E. Valdez-Resendiz ◽  
J.C. Rosas-Caro ◽  
J.C. Mayo-Maldonado ◽  
G. Calderon-Zavala
Keyword(s):  
Output Voltage ◽  
Boost Converter ◽  
Input Current ◽  
Current Output ◽  
Voltage Ripple

Modelling and Simulation of Current Fed Interleaved Isolated DC-DC Boost Converter for Fuel Cell Applications

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
S. Saha ◽  
A. Bhattacharjee ◽  
E. Devaraj
Keyword(s):  
Fuel Cell ◽  
Output Voltage ◽  
High Gain ◽  
Input Current ◽  
High Input ◽  
Magnetic Components ◽  
Voltage Ripple ◽  
In Series ◽  
Current Ripple ◽  
A Current

In this a paper, a current fed, interleaved, high gain, DC-DC converter is proposed for fuel cell applications. The converter also provides electrical isolation between the load and the source by using a transformer. The input features two current fed, full bridge inverters in parallel while the output features two full bridge diode rectifiers in series. By using this topology, the high input current is shared between the two inverters. These enables the use of lower current rating semiconductor devices, reduces switching stresses and reduces the size of magnetic components. It also results in reducing the input current ripple and the output voltage ripple.

scholarly journals STUDY AND PERFORMANCE OF SINGLE-PHASE RECTIFIERS WITH VARIOUS TYPE OF PARAMETER

2020 ◽  
Vol 3 (1) ◽  
pp. 9-14
Author(s):  
S.K. Mahobia ◽  
G.R. Kumrey
Keyword(s):  
Power Supply ◽  
Output Voltage ◽  
Power Supply System ◽  
Single Phase ◽  
Supply System ◽  
Input Current ◽  
Voltage Gain ◽  
Different Types ◽  
Step Down ◽  
And Performance

This paper represents the study of different types of single phase AC to DC step down converter. Performances and outputs have analyzed depending on the equations. Different parameters such as voltage gain, harmonic contents in input current, and parameters of changing output voltage are compared different type of single phase AC to DC converters. AC to DC converter is defined as rectifier. The main power supply system is alternating in nature. Rectification action is required to obtain DC supply from the main power supply which issinusoidal.

Sign in / Sign up

Export Citation Format

Share Document