scholarly journals Simulation Analysis of Improved Construction and Control Strategy for Programmable AC Power Source

2015 ◽  
Vol 11 (7) ◽  
pp. 41
Author(s):  
Xiaorui Guo ◽  
Peiliang Wang ◽  
Yanfeng Wang
Keyword(s):  
Pulse Width Modulation ◽  
Hybrid Control ◽  
Simulation Analysis ◽  
Mathematic Model ◽  
Voltage Regulation ◽  
Power Source ◽  
Control Technique ◽  
Modulation Mode ◽  
Ac Power ◽  
Control Scheme

Novel circuit topology and advanced control technique of inverter are research focus for programmable AC power source. An improved dual buck half bridge inverter topology is introduced and the central symmetrical pulse width modulation mode is proposed to double the output current ripple frequency. High output precision can be achieved by optimizing the output waveforms of inverter. Then, a hybrid digital control scheme combining PID control with repetitive control as well as inductance compensation deadbeat control is presented for the closed loop voltage regulation of the mentioned inverter. Besides, an inductance saturation characteristic mathematic model is established for accurate simulation. Simulation results show that the theoretical analysis of the special switching sequence and hybrid control scheme is true.

Implementation of Single-Phase Two-Switch Midpoint Unidirectional Multilevel Converter System

2018 ◽  
Vol 19 (4) ◽  
Author(s):  
Peethala Rajiv Roy ◽  
P. Parthiban ◽  
B. Chitti Babu
Keyword(s):  
Single Phase ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Supply Voltage ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Open Loop ◽  
Current Control ◽  
Control Technique ◽  
Control Scheme

Abstract This paper deals with implementation of a single-phase three level converter system under low voltage condition. The frequency of the switches is made constant and involves change in ${t_{on}}$ and ${t_{off}}$ duration. For this condition the pulse width modulation control scheme for a single phase three level rectifier is developed to improve the power quality. The hysteresis current control technique is adopted to bring forth three-level PWM on the dc side of the bridge rectifier and to achieve high power factor and low harmonic distortion. Based on the proposed control scheme, the line current is driven to follow the sinusoidal current command which is in phase with the supply voltage. By using three-level voltage pattern the blocking voltage of each power device is clamped to half of the dc link voltage. The simulation and experimental results of 20W converter under low input voltage condition are shown to verify the circuit performance. Open loop simulation and hardware tests are implemented by applying a low voltage of 15 V(rms) on the input side.

Non-Dimensional Modeling and Simulation Analysis of Air Powered Engine

2013 ◽  
Vol 278-280 ◽  
pp. 307-314 ◽  
Author(s):  
Rong Zhi Song ◽  
Xiang Heng Fu ◽  
Mao Lin Cai
Keyword(s):  
Fossil Fuels ◽  
Simulation Analysis ◽  
Mathematic Model ◽  
Power Source ◽  
Compressed Air ◽  
Pollutant Emission ◽  
Energy Crisis ◽  
Power Devices ◽  
Working Process ◽  
Dimensional Modeling

Environmental pollution and energy crisis urge people to explore new power devices without burning fossil fuels and pollutant emission. Air powered engine (APE) is among these power devices. The medium and power source of APE is compressed air whose expansion makes it possible for APE to output work. Based on the principal and working process of APE, the mathematic model is established and afterwards made dimensionless. On the basis of the simulation of the non-dimensional mathematic model, the influences of the non-dimensional cylinder stroke and Kagawa coefficient on APE’s performances are analyzed

Influence of Silicon Controlled Rectifier Voltage Regulation Device under DDC-Temperature Control

2013 ◽  
Vol 706-708 ◽  
pp. 826-829
Author(s):  
Ya Ping Lu ◽  
Tian Lin Song ◽  
Hai Qing Liu
Keyword(s):  
Temperature Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Voltage Regulation ◽  
Power Source ◽  
Control Device ◽  
Temperature Control System ◽  
Trigger Pulse ◽  
High Control ◽  
Control Accuracy

In the boiler heating control device of combining DDC and the silicon controlled rectifier voltage regulation device, there are phase shift trigger, pulse width modulation (PWM) and cycle wave cross zero trigger (CYC). Under the different silicon controlled rectifier voltage regulation devices, there are different influences for DDC. It makes the best of the cycle characteristics of the alternating current (AC) for the cycle wave cross zero trigger (CYC). For DDC - temperature control system, there are advantages of high control accuracy, less interference and power source pollution.

Intelligent real-time pressure tracking system using a novel hybrid control scheme

2017 ◽  
Vol 40 (13) ◽  
pp. 3744-3759 ◽  
Author(s):  
Zhonglin Lin ◽  
Tianhong Zhang ◽  
Qi Xie
Keyword(s):  
Real Time ◽  
Pulse Width Modulation ◽  
Time Pressure ◽  
Hybrid Control ◽  
Tracking System ◽  
Control Scheme ◽  
Field Programmable ◽  
Switching Method ◽  
Original Approach ◽  
Hybrid Control Scheme

In this paper, a novel hybrid control scheme is proposed to improve the control performance in a real-time pressure tracking system using fast on-off solenoid valves. In this novel hybrid control scheme, an original approach named Time Interlaced Modulation (TIM) is developed to replace the traditional Pulse Width Modulation (PWM) approach. Besides using TIM, a new switching method which is referred as seven possible control modes is designed to ensure the proper switching states of the valves. Moreover, a controller with field programmable gate array (FPGA) is chosen to guarantee the real-time implementation of the control algorithm. All the simulations and experimental results implemented on FPGA verify the feasibility of the hybrid control scheme.

scholarly journals Experimental prototype for PWM – Based Sliding Mode Boost Converter

2011 ◽  
Vol 7 (1) ◽  
pp. 35-41
Author(s):  
R. A. Abdulhalem ◽  
Haroutuon Hairik ◽  
Asmaa Kadhem
Keyword(s):  
Pulse Width Modulation ◽  
Sliding Mode ◽  
Experimental System ◽  
Voltage Regulation ◽  
Boost Converter ◽  
Experimental Results ◽  
Experimental Prototype ◽  
Control Scheme ◽  
Dynamic Performances ◽  
Conduction Mode

The paper dells with a modified experimental prototype for pulse-width modulation (PWM) sliding mode control (SMC) applied to a DC-to-DC-boost converter operated in continuous conduction mode (CCM). Experimental results show that the proposed control schme provides good voltage regulation and is suitable for common DC-to-DC conversion purposes. The prototype and its implementation are given in detail. The static and dynamic performances of the The static and dynamic performances of the experimental system are recorded. Experimental results show that the proposed control scheme provides good voltage regulation and is suitable for common DC-to-DC conversion purposes.

A Study of Run-to-Run Control Efficiency for Quality Improvement

2013 ◽  
Vol 328 ◽  
pp. 283-286
Author(s):  
Chien Chih Wang
Keyword(s):  
Simulation Analysis ◽  
Statistical Quality Control ◽  
Control Technique ◽  
Single Input Single Output ◽  
Single Output ◽  
Autoregressive Parameter ◽  
Control Scheme ◽  
Self Tuning ◽  
Single Input ◽  
Quality Control Technique

In a traditional run-to-run control scheme, each run requires starting the controlling model, which results in unnecessary adjustment risks when the process is stable. This study used the statistical quality control technique to calculate the adjustment limit, and proposed the start process controller criterion to prevent over-control. The simulation analysis results of the single-input single-output process showed that when the autoregressive parameter is large, the MSE when using the self-tuning controller in addition to an appropriate adjustment limit is less than that of the EWMA controller with an integrated adjustment limit. When the autoregressive parameter is small, no significant differences of MSE are present, though the EWMA controller with an adjustment limit is advantageous due to easier calculation.

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