Analysis on Bi-Frequency BUCK Circuit Current Ripple Suppressing

2013 ◽  
Vol 834-836 ◽  
pp. 1101-1104
Author(s):  
Jun Li ◽  
Jun Hong Zhang ◽  
Wei Gao
Keyword(s):  
Phase Shift ◽  
Theoretical Analysis ◽  
Frequency Modulation ◽  
High Frequency ◽  
Simulation Studies ◽  
Current Analysis ◽  
Output Current ◽  
Low Frequencies ◽  
Simulation Results ◽  
Current Ripple

Bi-frequency modulation can effectively solve the contradiction between high frequency and efficiency, but it will bring the problem of the current ripple. In this paper, use Buck circuit as the prototype, adopt phase shift parallel technology, make theoretical analysis and simulation studies on the bi-frequency circuit that the high and low frequencies units are operating in a state of continuous inductor current. Analysis and simulation results show that phase shift parallel can effectively inhibit the output current ripple. [email protected] [email protected] [email protected]

Precession Characteristics Analysis of Ballistic Target Based on Non-Ideal Scattering Centers

2012 ◽  
Vol 580 ◽  
pp. 329-333
Author(s):  
Qi Lie Ma ◽  
Wei Hong Lu ◽  
Cun Qian Feng ◽  
Jie Zhang ◽  
Zhe Wang
Keyword(s):  
Theoretical Analysis ◽  
Frequency Modulation ◽  
Target Recognition ◽  
Problem Model ◽  
Scattering Centers ◽  
Characteristics Analysis ◽  
Radar Echo ◽  
Modulation Signal ◽  
Micro Motion ◽  
Simulation Results

Precession characteristics are very important for ballistic target recognition. It is theoretically approved that the radar echo is sinusoidal frequency modulation signal when the micro-motion of scattering centers is the same as warhead itself. But this assumption disagrees with the fact. To solve this problem, model of precession target is set and the expression of the micro-Doppler of the non-ideal scattering centers is obtained in the paper. Then, precession characteristics of warhead are presented in the end of the paper. Finally, the correctness of theoretical analysis is validated through the simulation results.

Interleaved Parallel for DC-DC Converters Operating in CCM

2013 ◽  
Vol 753-755 ◽  
pp. 2439-2442
Author(s):  
Jun Li ◽  
Jun Hong Zhang ◽  
Wei Gao
Keyword(s):  
Power Supply ◽  
Power Conversion ◽  
Fourier Series Expansion ◽  
Study Analysis ◽  
Output Current ◽  
Power Simulation ◽  
Dc Power ◽  
Continuous State ◽  
Simulation Results ◽  
Current Ripple

In the power conversion, power supply in parallel to increase capacity and reliability is a commonly used method; and the current ripple have a great impact on the size and weight of the power supply. DC-DC parallel power supply ripple in the buck circuit model based on analysis, Fourier series expansion of the current continuous state of a single DC power inductor current, commence on the series and parallel power simulation study. Analysis and simulation results show that interleaved parallel can effectively inhibit the output current ripple.

An Improved Switched-Inductor Z-Source Inverter

2014 ◽  
Vol 494-495 ◽  
pp. 1538-1541
Author(s):  
Jian Gan Chen ◽  
Chun Wei Cai ◽  
Pu Feng An
Keyword(s):  
Steady State ◽  
Theoretical Analysis ◽  
Input Current ◽  
Constant Input ◽  
Topology Analysis ◽  
Simulation Results ◽  
Current Ripple

This paper presents an improved switched inductor (SL) Z-source inverter, which is derived from the classical SL Z-source inverter. To decrease the input current ripple, the proposed inverter employs an LC boost impedance network between the source and Z-source network. Compared with the SL Z-source inverter, the proposed inverter has the constant input current from the source and increases voltage boost inversion ability significantly. Topology analysis in the steady state is given, and simulation results verify the theoretical analysis results.

scholarly journals On The Realization of Low/High Frequency CCII+ Based Oscillators Employing Grounded Resistors and Lossy Capacitors

1995 ◽  
Vol 17 (4) ◽  
pp. 269-274 ◽  
Author(s):  
Muhammad Taher Abuelma'atti ◽  
Muhammad Haroon Khan
Keyword(s):  
High Frequency ◽  
Second Generation ◽  
Current Conveyors ◽  
Independent Control ◽  
Low Frequencies ◽  
Positive Current ◽  
Condition Of Oscillation ◽  
Simulation Results ◽  
Oscillator Circuits

New RC oscillator circuits are presented. Each circuit uses two second-generation positive current-conveyors, three grounded capacitors and four grounded resistors. The circuits enjoy independent control of the frequency and the condition of oscillation and are very attractive for integration. The circuits can realize high and low frequencies of oscillation. Simulation results are included.

AN IMPROVED MULTIDEVICE INTERLEAVED BOOST CONVERTER WITH NOVEL MULTIPLEX CONTROLLER FOR FUEL CELL

2016 ◽  
Vol 79 (1) ◽  
Author(s):  
Muhamad Norfais Faisal ◽  
Azah Mohamed ◽  
M. A. Hannan ◽  
Wan Ramli Wan Daud ◽  
Edy Herianto Majlan
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Output Voltage ◽  
Boost Converter ◽  
Input Current ◽  
Simulation Studies ◽  
Output Current ◽  
Output Capacity ◽  
Interleaved Boost Converter ◽  
Current Ripple

Mass commercialization of fuel cells (FC) and its usage in transportation requires that the FC technology to be competitive with regard to performance and cost, while meeting efficiency and emissions targets. Therefore, fuel cell output current ripple that may shorten FC lifespan, worsen FC efficiency and reduce the FC output capacity need to be addressed. In this paper, an improved multi-device interleaved boost converter (MDIBC) with novel multiplex controller topology is designed to further reduce the input current and output voltage ripples, without increasing the number of MDIBC switching devices. The Matlab/Simulink behaviour model of the improved MDIBC with novel multiplex controller and conventional MDIBC circuit are developed in the simulation studies. The proposed improved MDIBC design is then compared with the conventional MDIBC and its performance is verified. 

scholarly journals An Optical Analog-to-Digital Converter with Enhanced ENOB Based on MMI-Based Phase-Shift Quantization

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 52
Author(s):  
Yue Liu ◽  
Jifang Qiu ◽  
Chang Liu ◽  
Yan He ◽  
Ran Tao ◽  
...  
Keyword(s):  
Phase Shift ◽  
Multimode Interference ◽  
Analog To Digital Converter ◽  
Effective Number ◽  
Digital Converter ◽  
Analog To Digital ◽  
Mmi Coupler ◽  
Simulation Results ◽  
Optical Analog ◽  
Optical Quantization

An optical analog-to-digital converter (OADC) scheme with enhanced bit resolution by using a multimode interference (MMI) coupler as optical quantization is proposed. The mathematical simulation model was established to verify the feasibility and to investigate the robustness of the scheme. Simulation results show that 20 quantization levels (corresponding to 4.32 of effective number of bits (ENOB)) are realized by using only 6 channels, which indicates that the scheme requires much fewer quantization channels or modulators to realize the same amount of ENOB. The scheme is robust and potential for integration.

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