Control Method Research of Parallel Operation of Power System with Multiple Sources

2014 ◽  
Vol 945-949 ◽  
pp. 1583-1586
Author(s):  
Jia Ling Yu ◽  
Long Han Cao ◽  
Hao Mu ◽  
Jing Nan Li
Keyword(s):  
Fuzzy Control ◽  
Power Supply ◽  
Output Voltage ◽  
Control Method ◽  
Supply Voltage ◽  
Energy Utilization ◽  
Output Current ◽  
Multiple Sources ◽  
Power Sources ◽  
Multiple Power

The parallel connection of multiple power supplies generates output current only depended on the highest power voltage because of the unmatched precision of output voltage and imbalance output power. On account of lacking an appropriate way to solve that current problem presently, this paper presents a multiple power sources control method based on fuzzy control. According to the output voltage error and its change rate of each power source, this method modulates PWM by fuzzy control to keep each voltage conversion circuit share the same output voltage. So the output current of power multiple sources is equal to the sum of multiple power current, make the available power supply at the same time, solve the countercurrent and output current offered by the supreme power supply voltage, increase the energy utilization.

A Dual-Loop-Based Parallel Power Supply System

2013 ◽  
Vol 655-657 ◽  
pp. 1609-1613
Author(s):  
Yu Hao Zhang
Keyword(s):  
Power Supply ◽  
Output Voltage ◽  
Power Supply System ◽  
Control Method ◽  
Supply System ◽  
Digital Calibration ◽  
Numerical Control ◽  
Output Current ◽  
Loop Control ◽  
High Efficient

The dual-loop control method, in which inner-loop is the current and outer-loop is the voltage, is proposed to design a high-efficient precise numerical control parallel power supply system, it operates at input voltage of 24V, output voltage of 6-12V and output current of 0-4A. The current ratio of the parallel circuits can be set arbitrarily. Precise adjustment of output current and improvement of efficiency are realized by width modulation and synchronous buck-topology switching power supply, the output current error is smaller than 20mA and DC-DC conversion efficiency is up to 90%; to make output voltage error smaller than 30 mV and the current-sharing error smaller than 0.5%, digital calibration technology and PID control algorithm are used. In addition, this system is equipped with the function of overload protection, double-source redundant heat standby and turn-off, etc.

Optimal Design of Energy-Saving Induction Cooker Power Controller Based on Fuzzy Technology

2014 ◽  
Vol 678 ◽  
pp. 423-428
Author(s):  
Pin Qi Zheng ◽  
Qing Sheng Yu
Keyword(s):  
Fuzzy Control ◽  
Output Power ◽  
Power Supply ◽  
Supply Voltage ◽  
Operating Temperature ◽  
Voltage Regulation ◽  
Soft Switching ◽  
Switch Mode ◽  
Output Efficiency ◽  
Switch Voltage

Application of Soft-switching technique and fuzzy control is discussed to optimize traditional induction cooker controller. Soft-switching technique is used to improve output efficiency of induction cooker. Switch voltage regulation by fuzzy control are used to adjust output power of induction cooker. Soft-switching inverter consists of resonant DC link and LC resonant network. Resonant DC link is used to realize ZVS, and resonant network is used to eliminate harmonics. Fuzzy control based on look-up table is adopted to adjust duty cycle of switch mode regulated power supply, which changes the DC supply voltage, so that amplitude of AC signal inverted by induction cooker is changed to adjust output power of induction cooker according to the requirement, , ensuring the operating temperature aligned with the target temperature.

The Design of a 150V/50Hz High-Quality Single-Phase Inverter Based on TMS320LF2407A

2012 ◽  
Vol 433-440 ◽  
pp. 3728-3733
Author(s):  
Zhen Wang ◽  
Ling Shun Liu
Keyword(s):  
Power Supply ◽  
Output Voltage ◽  
Single Phase ◽  
Control Method ◽  
Power Module ◽  
High Quality ◽  
Phase Inverter ◽  
Single Phase Inverter ◽  
Intelligent Power Module ◽  
The Stability

According to the requirement of a missile’s power supply, a 150V/50Hz high-quality single-phase inverter has been developed, and the CPU is TMS320LF2407A, and the main circuit is full-bridge inverter intelligent power module (IPM), and SPWM control method has been used too. The stability and the accuracy of the output voltage of this power supply have been improved because of the use of the digital PID regulator. The results of experiments show that the power supply has the advantages of the simple-circuit, the high-quality output-waveform, the high-stability output-voltage and so on.

Development of PZT Multi-Channel Power Supply Based on PA93

2011 ◽  
Vol 48-49 ◽  
pp. 428-433 ◽  
Author(s):  
Wei Fan ◽  
Chang Cai Cui ◽  
Zhong Shen Li
Keyword(s):  
Power Supply ◽  
Piezoelectric Ceramic ◽  
Output Voltage ◽  
Output Current ◽  
Channel Power ◽  
Nonlinear Error ◽  
Voltage Variation ◽  
Continuous Output ◽  
Continuous Working ◽  
Power Channel

Good performance of driving power supply is the key to achieve high-precision positioning of the piezoelectric ceramic. In this paper, mainly from the expansion of power channel, lower ripple and interference, reducing the volume and temperature control of amplifier such aspects, developed PZT multi-channel power supply based on PA93 power amplifier, and completed the corresponding experiments of the calibration characteristics. By testing, the output voltage of eight channels shows good linearity, the nonlinear error is less than 0.05％. the resolution is 6mv, the static ripple voltage is less than 9mV, the power bandwidth could be 5kHz, the continuous output current could be 1.5A, the voltage variation is less than 0.01％ after eight hours continuous working. The volume of power supply is only 280*260*120mm, the power supply could satisfy the requirements of PZT driving.

scholarly journals Efficiency of Innovative Charge Pump versus Clock Frequency and MOSFETs Sizes

2016 ◽  
Vol 16 (5) ◽  
pp. 260-265 ◽  
Author(s):  
David Matoušek ◽  
Jiří Hospodka ◽  
Ondřej Šubrt
Keyword(s):  
Output Voltage ◽  
Supply Voltage ◽  
Charge Pump ◽  
Specific Power ◽  
Pump Efficiency ◽  
Clock Frequency ◽  
Output Current ◽  
Charge Pumps ◽  
Complex Optimization ◽  
Charge Pump Circuit

Abstract Charge pumps are circuits that produce the voltage higher than supply voltage or negative voltage. Today, charge pumps became an integral part of the electronic equipment. The integration of charge pumps directly into the system allows manufacturers to feed a complex system with many specific power requirements from a single source. However, charge pump efficiency is reduced by many phenomena. This paper is focused on the question of efficiency of proposed variant of the charge pump. In this article, the efficiency dependence on a number of stages, output current, clock frequency and MOSFETs sizes was simulated by Eldo. The aim of this study is to determine the MOSFETs sizes and theirs influence to efficiency and the output voltage. Complex optimization of the charge pump circuit will follow in further text.

scholarly journals Shaping SiC MOSFET Voltage and Current Transitions by Intelligent Control for Reduced EMI Generation

Electronics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 508 ◽  
Author(s):  
Congwen Xu ◽  
Qishuang Ma ◽  
Ping Xu ◽  
Tongkai Cui
Keyword(s):  
Intelligent Control ◽  
Electromagnetic Interference ◽  
Output Voltage ◽  
Closed Loop ◽  
Control Method ◽  
Reference Signal ◽  
Current Control ◽  
Oxide Semiconductor ◽  
Output Current ◽  
High Frequency Region

In power converters, the fast switching of the power conversion components results in rapid changes in voltage and current, which results in oscillations and high-level electromagnetic interference (EMI), so the power components become a source of internal electromagnetic interference. Taking SiC Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) as an example, an intelligent control method to suppressing interference sources is proposed in this paper. The combination of open-loop and closed-loop methods can simultaneously reduce the electromagnetic interference generated by voltage and current. Firstly, this paper analyzes how to select a reference signal. The relationship between the time domain and the frequency domain of the noise signal is analyzed. The convolution of the trapezoidal signal and the Gaussian signal is selected as the reference signal, which is named S-shaped signal in this paper. The S-shaped signal has continuous infinitely conductive characteristics, so its spectrum has a large attenuation in the high frequency region. Secondly, a new topology is proposed. Based on the closed-loop gate control, a current control signal is added, which can simultaneously shape the output voltage and control the output current slope. Both the simulation results and the experimental results show that the output voltage can follow the reference signal, S-shaped signal, and the slope and overshoot of output current can be changed. Compared with classical gate driver method, the spectrum of output voltage and output current obtained by the method proposed in this paper has a large attenuation, in other words, the electromagnetic interference is significantly reduced.

The Control Strategy Study on Combined Mechanical and Electrical Braking of 8 x 8 Vehicles Driven by Wheel Hub Motor

2014 ◽  
Vol 898 ◽  
pp. 578-581
Author(s):  
Yu Lin Yan ◽  
Jia Qi Li ◽  
Zi Li Liao ◽  
Chun Guang Liu
Keyword(s):  
Fuzzy Control ◽  
Electric Vehicles ◽  
Electric Drive ◽  
Control Strategy ◽  
Control Method ◽  
Energy Utilization ◽  
Brake System ◽  
Utilization Rate ◽  
Strategy Study

In order to recycle part of the brake energy in the driving hub motor of the 8X8 electric vehicles. And the energy utilization rate of electric drive vehicles should be increased, the wear of mechanical brake system should be reduced. A fuzzy control method is established for mechanical and electrical joint brake. It can be used to establish a principle of the distribution of brake. Through the simulation on MATLAB platform, it shows that this control method is efficient in improvement of brake ability, distribution of brake distribution, and the energy recycling.

Simulation Research of Inverted Plasma Cutting Power Supply Based on Fuzzy Control

2011 ◽  
Vol 179-180 ◽  
pp. 1229-1234
Author(s):  
De Li Jia ◽  
Rui Jia Wang ◽  
Chun Sheng Wang
Keyword(s):  
Steady State ◽  
Fuzzy Control ◽  
Power Supply ◽  
Control Method ◽  
Fuzzy Controller ◽  
System Response ◽  
Plasma Cutting ◽  
Steady State Condition ◽  
Cutting Power ◽  
Load Disturbance

Focusing on load characteristics of inverted plasma cutting power supply, this paper puts forward a nonlinear control method. This method integrates fuzzy control technology into the controller of power supply, thereby optimizing dynamic characteristics of power supply. The SIMULINK simulation technology is also used. To compare steady-state precision, robustness, response speed and other control indexes between fuzzy control and conventional PI control, the comparative simulation experiments were made respectively under constant non-disturbance steady-state condition, aperiodic load disturbance condition, and periodic load disturbance condition. The simulation results show that power supply with fuzzy controller has perfect steady robustness, fast system response and strong harmonic suppression ability. The simulation model is accurate and reliable, and it can be an efficient tool for further studying mechanism and algorithm optimization of plasma cutting power supply.

scholarly journals Combining DVR and UPS Techniques for an Uninterruptable Supply of Ultra-Sensitive Non-Linear Appliances

2020 ◽  
Vol 26 (3) ◽  
pp. 28-35
Author(s):  
Branislav Dobrucky ◽  
Jozef Sedo ◽  
Roman Konarik
Keyword(s):  
Power Supply ◽  
Control Method ◽  
Supply Voltage ◽  
Uninterruptible Power Supply ◽  
Comparison Results ◽  
Non Linear ◽  
Voltage Sag Detection ◽  
Uninterruptible Power ◽  
Supply Interruptions ◽  
Fast Control

The paper deals with an application of combined techniques of dynamical voltage restorer (DVR) and uninterruptible power supply (UPS) that make possible both the short voltage sags compensation, as well as longer power supply interruptions, under the simultaneous operation of equipment and network. This is enabled mainly by an instantaneous voltage sag detection, quick bidirectional over-switches, and an instantaneous control method of the output voltage. This needs a fast control method, which can provide a voltage recovery for phase-sensitive loads during several calculation steps, so the dead-beat regulator is used. Such a system even compensates for the influence of non-linear loads on the power supply network without a change of a phase and amplitude of the supply voltage. The simulation results in Matlab/Simulink, as well as real experiments and their comparison results, are given in the paper.

scholarly journals DEVELOPMENT OF UV-BOX CONTROL SYTEM PROTOTYPE FOR STERILIZATION MEDIA USING PHOTODIODE SENSOR

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Laila Katriani ◽  
Denny Darmawan ◽  
Ahmad Awaluddin Noer
Keyword(s):  
Control System ◽  
Software Design ◽  
Power Supply ◽  
Physics Education ◽  
Output Voltage ◽  
Supply Voltage ◽  
Hardware Design ◽  
State University ◽  
Power Supply Voltage ◽  
Two Stages

This research aims to design a UV box control system as sterilization media using photodiode sensor. The study began in June until November 2014. The study was conducted at the Laboratory of Electronics and Instrumentation, Department of Physics Education, State University of Yogyakarta. The design of the UV box control system consists of two stages, namely, the design of the hardware and software design. Hardware design consists of a power supply design, sensor design,  comparator design, and a buzzer. Based on the results of tests that have been done shows the power supply voltage of 4.86 volts, the reference voltage of 3.76 volts, the comparator output voltage when low of 0.12 volts, the comparator output voltage when high of 3.0 volts. Keywords: UV-Box, Sterilization Media, photodiode

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