scholarly journals The High-Reliability Optimization of Dead-Time Circuit for Push-Pull DC-DC Converter

2021 ◽  
Vol 2083 (4) ◽  
pp. 042059
Author(s):  
Huixia Guo ◽  
Xiang Li ◽  
Libin Jia ◽  
Yongqin Hao ◽  
Wu Ren
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
High Reliability ◽  
Reliability Optimization ◽  
Power Transistor ◽  
Conduction State ◽  
Setting Parameters

Abstract Aiming at of the problem of common conduction state in push-pull DC-DC converter’s power transistor, an optimization solution by improving pulse width modulation(PWM) mode and reasonable setting parameters of the transformer and the inductance was proposed. The solution was analyzed in detail and test of the optimized circuit are carried out. The results show that the optimized circuit can effectively eliminate common conduction state, make the converter have a suitable dead-time and greatly improve the reliability of the converter.

scholarly journals A Novel Zero Dead-Time PWM Method to Improve the Current Distortion of a Three-Level NPC Inverter

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2195
Author(s):  
Jin-Wook Kang ◽  
Seung-Wook Hyun ◽  
Yong Kan ◽  
Hoon Lee ◽  
Jung-Hyo Lee
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Short Circuit ◽  
Reference Voltage ◽  
Voltage Source ◽  
Switching Operation ◽  
Voltage Unbalance ◽  
Offset Voltage ◽  
Simulation And Experiment

This paper proposes a novel pulse width modulation (PWM) for a three-level neutral point clamped (NPC) voltage source inverter (VSI). When the conventional PWM method is used in three-level NPC VSI, dead time is required to prevent a short circuit caused by the operation of complementary devices on the upper and lower arms. However, current distortion is increased because of the dead time and it can also cause a voltage unbalance in the dc-link. To solve this problem, we propose a zero dead-time width modulation (ZDPWM) which does not require dead time used in complementary operation. The proposed technique applies the offset voltage to the space vector pulse width modulation (SVPWM) reference voltage for the same modulation index (MI) as the conventional SVPWM, but any complementary switching operation needs dead time. In addition, the proposed method is divided into four operation sections using the reference voltage and phase current to operate switching devices which flow the current depending on the section. This ZDPWM method is simply implemented by carrier and reference voltage that reduce the current distortion, because complementary operation that needs dead time is not implemented. However, the operation section is delayed due to the sampling delay that occurs during the experiment. Therefore, in this paper, we conduct a modeling of sampling delay to improve the delay of operation section. To verify the principle and feasibility of the proposed ZDPWM method, a simulation and experiment are implemented.

Research on a Novel Non Dead-Time Compensation Two-Phase Modulation SVPWM Control Strategy

2012 ◽  
Vol 546-547 ◽  
pp. 1050-1055
Author(s):  
Bao Lian Liu ◽  
De Fei Jin
Keyword(s):  
Control Strategy ◽  
Phase Modulation ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Modulation Method ◽  
Two Phase ◽  
Switching Losses ◽  
Dead Time Compensation ◽  
Switching State

A space vector pulse-width modulation (SVPWM) strategy was developed to solve the failure of traditional SVPWM. A two-phase modulation method is adopted basing on the analyses of traditional SVPWM to select the null switching state in each sector according to the power factor angle. As a result, when the current is crossing zero, the corresponding phase does not commute and dead-time compensation is avoided; and when the current is nearing the peak, the corresponding phase also don’t commute, which leads to lower switching losses. The simulation and experimental results validate that the proposed strategy can effectively improve the current wave, minimize the current distortion and reduce the switching losses. Furthermore, the algorithm is easy to implement.

Tri‐carrier sinusoidal pulse‐width modulation without dead time effects for converters

2015 ◽  
Vol 8 (10) ◽  
pp. 1941-1951 ◽  
Author(s):  
Chonghui Song ◽  
Naizhe Diao ◽  
Zhiwei Xue ◽  
Xianrui Sun ◽  
Jianning Guan
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Time Effects ◽  
Sinusoidal Pulse Width Modulation

scholarly journals PULSE WIDTH MODULATION TECHNIQUE FOR THE SPEED CONTROL OF M-PHASE AC MOTORS

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
JOEL OSARUMWENSE EGWAILE ◽  
MATTHEW ORIAHI
Keyword(s):  
Phase Angle ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Harmonic Distortion ◽  
Cost Effective ◽  
Power Transistor ◽  
Bipolar Switching ◽  
M Phase ◽  
Modulation Control

<p>Thyristors are now widely used in many power electronics and motor driven applications and all the known methods of control are nothing but variations of either the phase angle firing control (PFC) or the pulse width modulation control (PWM). Each of these methods has its own benefits and disadvantages, but the pulse width modulation control method is, perhaps, by far, the most effective and costly method. Since PWM differs from phase firing control (PFC) in that the control action of PWM takes place only during the time of the firing pulse, this research seeks to develop a combination firing package that maximizes the benefits of the two methods. At first a thyristor is configured as a PNP-type power transistor latch with two ordinary NPN bipolar switching transistors. The power transistor is switched on by zero crossover firing and then switched off by phase angle delay firing. The performance of the model was evaluated and the dynamic characteristics of the motor, such as speed, current, voltage and the total harmonic distortion were carried via simulation. The results shows that by using the Modified PWM firing technique the speed of an m-phase induction motor can be controlled more effectively and reliably. The circuit is easy to implement and cost effective and may be patented and made available for commercial use.</p>

scholarly journals New Dead-Time Compensation Method of Power Inverter using Carrier Based Sinusoidal Pulse-Width Modulation

2018 ◽  
Vol 8 (6) ◽  
pp. 4880
Author(s):  
Suroso Suroso ◽  
Daru Tri Nugroho ◽  
Toshihiko Noguchi
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Compensation Method ◽  
Voltage Source ◽  
Output Current ◽  
Dead Time Correction ◽  
Source Power ◽  
Dead Time Compensation ◽  
Sinusoidal Pulse Width Modulation

<p>A new dead-time compensation method of power inverter circuits is suggested and presented in this paper. The proposed method utilizes carrier based sinusoidal pulse width modulation technique to produce driving signals of the inverter power switches with dead-time correction capability. The proposed method able to eliminate dead-time effects such as reducing the waveform distortion of the inverter output current, and increasing the fundamental component amplitude of output current. An analysis of the proposed method is presented. Some computer simulations were carried out to investigate the principle operation, and to test performance of the new method. The developed method was validated through experimental test of H-bridge voltage source inverter circuits. The data obtained from the computer simulation and prototype experiments have confirmed that that the proposed method worked well compensating the dead-time in the voltage source power inverter circuits.</p>

scholarly journals Application of space vector pulse width modulation algorithm based on programmable logic array in power system

2021 ◽  
Vol 2108 (1) ◽  
pp. 012003
Author(s):  
Zhihai Cheng ◽  
Hui Liu
Keyword(s):  
Motor Control ◽  
Power System ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Control Method ◽  
High Reliability ◽  
Voltage Regulation ◽  
Space Vector ◽  
Theoretical Support ◽  
Induced Draft Fan

Abstract In the traditional power system, the voltage regulation and frequency modulation control method used for boiler induced draft fan is limited in control accuracy. With the improvement of furnace pressure change accuracy, higher requirements are put forward for motor control algorithm. This paper studies permanent magnet synchronous motor (PMSM) as the executive part of induced draft fan servo control system, and adopts FOC control method based on space vector pulse width modulation (SVPWM). Firstly, the simulation model of SVPWM pulse width modulation algorithm is established by MATLAB to provide theoretical support for the subsequent debugging algorithm; When using FPGA to realize SVPWM modulation algorithm, FPGA has the advantages of high reliability and high real-time processing, which provides theoretical support and application guidance for the realization of high-precision motor control of boiler induced draft fan in power system.

scholarly journals PULSE WIDTH MODULATION TECHNIQUE FOR THE SPEED CONTROL OF M-PHASE AC MOTORS

2019 ◽  
Vol 25 (1) ◽  
pp. 46-57
Author(s):  
EGWAILE JOEL OSARUMWENSE ◽  
ORIAHI MATTHEW
Keyword(s):  
Phase Angle ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Harmonic Distortion ◽  
Cost Effective ◽  
Power Transistor ◽  
Bipolar Switching ◽  
M Phase ◽  
Modulation Control

Thyristors are now widely used in many power electronics and motor driven applications and all the known methods of control are nothing but variations of either the phase angle firing control (PFC) or the pulse width modulation control (PWM). Each of these methods has its own benefits and disadvantages, but the pulse width modulation control method is, perhaps, by far, the most effective and costly method. Since PWM differs from phase firing control (PFC) in that the control action of PWM takes place only during the time of the firing pulse, this research seeks to develop a combination firing package that maximizes the benefits of the two methods. At first a thyristor is configured as a PNP-type power transistor latch with two ordinary NPN bipolar switching transistors. The power transistor is switched on by zero crossover firing and then switched off by phase angle delay firing. The performance of the model was evaluated and the dynamic characteristics of the motor, such as speed, current, voltage and the total harmonic distortion were carried via simulation. The results shows that by using the Modified PWM firing technique the speed of an m-phase induction motor can be controlled more effectively and reliably. The circuit is easy to implement and cost effective and may be patented and made available for commercial use.

The Realization of SVPWM Based on LabVIEW

2012 ◽  
Vol 468-471 ◽  
pp. 1398-1402
Author(s):  
Ling Zhi Cao ◽  
Shun Long Zhang
Keyword(s):  
Program Development ◽  
Virtual Instrument ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Fast Response ◽  
Graphical Programming ◽  
Acquisition Device ◽  
Data Acquisition Device ◽  
Dead Time Compensation

Programmed and realized space vector pulse width modulation (SVPWM) program with dead-time compensation based on the graphical programming language LabVIEW and virtual instrument data acquisition device. SVPWM verified on the Digital AC PMSM Speed Control System, as shown in the experiment utilizing virtual instrument to realize SVPWM has such advantages as simply and rapid program development, high precision, strong real-time and fast response.

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