Description: SPWM technique for Three Phase Inverter. Analysis fundamental improvement with respect to modulation index variation is done in simulation. Analysis can be done also for switching frequency variation for shifting the dominant harmonics Platform: |
Size: 13312 |
Author:padmanaban |
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Description: Selective Harmonic Elimination Pulses for three-phase Inverter
The model shows the simulation for Six Harmonic Removal Pulses (i.e., N=7)
Selected Harmonics made zero are:
5th, 7th, 11th, 13th, 17th and 19th
(i.e., N=7 means six (i.e., N-1) dominant harmonics are made zero)
In this simulation the dominant harmonics will be:
(3N+2) and (3N+4) i.e., 23rd and 25th Harmonics Platform: |
Size: 72704 |
Author:QQ |
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Description: This matlab simulink svpwm model just copy and paste it in work and simulate.this is powerful modulation technique to reduce harmonics.the THD compared to other modulation techniques is also low .This technique includes analysis of sectors and determination of reference voltage vector and also angle calculation finally it is fed to two-level inverter-This is matlab simulink svpwm model just copy and paste it in work and simulate.this is powerful modulation technique to reduce harmonics.the THD compared to other modulation techniques is also low .This technique includes analysis of sectors and determination of reference voltage vector and also angle calculation finally it is fed to two-level inverter Platform: |
Size: 68608 |
Author:conqueror |
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Description: 详细地讨论了空间矢量脉宽调制的基本理论, 介绍了利用的电机控制芯片实现的方法, 给出了实验结果波形。该控制方法速度快、精度高, 在电压型逆变器中能产生更少的谐波并减少开关损耗。-Discussed in detail the space vector pulse width modulation of the basic theory, introduced the use of the motor control chip method, experimental results are given waveform. The control speed, high precision, the voltage inverter can produce fewer harmonics and reduce the switching losses. Platform: |
Size: 276480 |
Author:xiliao |
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Description: 在交流电机变频调速中，脉宽调制技术已经得到了广泛的应用。而空间矢量脉宽调制方法与经典的脉宽调制方法相比，具有直流电压利用率高、控制简单、损耗较小、便于数字化方案实现等优点。文中介绍了利用TI 公司的DSP 电机控制芯片TMS320F2812 实现SVPWM 的方法。该控制方法速度快、精度高，在电压型逆变器中能产生更少的谐波并减少开关损耗。-AC motor speed regulation, pulse-width modulation technology has been widely used. The space vector pulse width modulation method and the classical PWM methods, a high utilization rate of DC voltage control is simple, loss of small, easy to realize the advantages of digital programs. In this paper, using TI' s TMS320F2812 DSP motor control chip to achieve SVPWM method. The control speed, high precision, the voltage inverter can produce fewer harmonics and reduce the switching losses. Platform: |
Size: 828416 |
Author:xiliao |
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Description: 随着电力电子技术的发展，变频调速异步电机越来越广泛地应用在各种工业领域。而变频调速系统的使用也给电力电子与电气传动学科带来了新的活力和研究课题，本文从变频调速异步电机的设计出发，首先将传统异步电机的设计方法与变频调速异步电机的设计方法进行了比较。指出了传统异步电机设计方法在变频调速异步电机设计中存在的局限性。同时，本文详细而系统地分析了变频调速异步电机中时间谐波和空间谐波的产生机理，论述了时间谐波和空间谐波对异步电机运行性能的影响，以及对异步电机绝缘系统的损害。-Following with the development of power electronics technology, the inverter-driven induction motor is widely used in all kinds of industry field. The utility of variable frequency and adjustable speed systems brings a new research area and activity of power electronics and motor drive subject, this paper begins with the design of inverter-driven induction motor. Firstly, compare the design method of inverter-driven induction motor with that of conventional induction motor. And point out the limitations of design method of conventional induction motor which is used in the design of inverter-driven induction motor. At the same time, the generation mechanics of time and space harmonics in the inverter-driven induction motor is analyzed in details. The influences of both types of harmonics to the operation of induction motor are described, especially the harm to the insulation structure of induction motor. Platform: |
Size: 266240 |
Author:WMW |
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Description: a five level h bridge inverter with gto switches
can produce five levels of output
harmonics will be very less compaerd with normal inverter Platform: |
Size: 14336 |
Author:suren |
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Description: 在传统矩阵变换器和多电平逆变器的基础上,提出一种新颖的多电平矩阵变换器,介绍了其拓扑结构和工
作原理.多电平矩阵变换器的能量传递,是通过三相输入电压对中点电容充电到一个恒定直流电压而实现的.选择适
当的控制算法和电容电压,能在变换器的两侧合成低次谐波含量小且波形近似于正弦的可控输入/输出电压.对多电
平矩阵变换器进行建模和仿真,并探讨了其输出能控性.
- On the basis of a conventional matrix converter and a multilevel inverter, a novel multilevel matrix
converter is proposed, and its topology configuration and principle are introduced. This converter operates as a
bidirectional converter and transfers energy between its two sides by charging the midpoint capacitors to a known
constant DC voltage level. Proper selection of control algorithms and capacitor voltages helps synthesize controllable
and waveforms almost sinusoidal three-phases AC voltage with minimum low-order harmonics at both sides of the
converter. The multilevel matrix converter is modeled and simulated with its output controllability discussed.
Platform: |
Size: 46080 |
Author:haha |
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Description: 用滤波器滤除逆变器中高次谐波，从而使系统稳定。-Filter to filter out the high-order harmonics in the inverter, so that the system is stable. Platform: |
Size: 15360 |
Author:lijinyu |
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Description: This paper
presents a PSCAD/EMTDC model of PV solar panels, the grid
connected three phase voltage sourced inverter (VSI) and its
controller system. The VSI control is implemented with current
control loops. A maximum power point tracking (MPPT)
algorithm is implemented to get the maximum output power for
any given solar irradiation and temperature. This is integrated
with the inverter control in such a way that the requirement of
DC-DC converter is eliminated to harvest the maximum power.
The inverter model also maintains near unity power factor
regardless of the level of power output and maintains an
acceptable level of current harmonics. Finally, the developed
model is validated with the output of a commercially used PV
module. Platform: |
Size: 355328 |
Author:起个名字真难 |
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Description: 通过simulink图搭建三相逆变器的控制图，采用SVPWM控制技术，是三相逆变器输出电流谐波很小。-Build a three-phase inverter control charts simulink diagram by using SVPWM control technology, is a three-phase inverter output current harmonics is small. Platform: |
Size: 1032192 |
Author:陆凯捷 |
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Description: In this paper, a simple single-phase grid connected photovoltaic (PV) inverter topology consisting of a boost section, a low-voltage single-phase inverter with an inductive filter, and a step-up transformer interfacing the grid is considered. Ideally, this topology will not inject any lower order harmonics into the grid due to high-frequency pulse width modulation operation. However, the nonideal factors in the system such as core saturation-induced distorted
magnetizing current of the transformer and the dead time of the inverter, etc., contribute to a significant amount of lower order harmonics in the grid current. A novel design of inverter current control that mitigates lower order harmonics is presented in this paper. Platform: |
Size: 18432 |
Author:hareesh |
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Description: Power electronics plays an important role in controlling
the grid-connected renewable energy sources. This paper
presents a novel adaptive neuro-fuzzy control approach for
the renewable interfacing inverter. The main objective is to
achieve smooth bidirectional power flow and nonlinear unbalanced
load compensation simultaneously, where the conventional
proportional-integral controller may fail due to the rapid change
in the dynamics of the highly nonlinear system. The combined
capability of neuro-fuzzy controller in handling the uncertainties
and learning from the processes is proved to be advantageous
while controlling the inverter under fluctuating operating conditions.
The inverter is actively controlled to compensate the harmonics,
reactive power, and the current imbalance of a three-phase
four-wire (3P4W) nonlinear load with generated renewable power
injection into the grid simultaneously. Platform: |
Size: 20480 |
Author:hareesh |
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Description: 本文提出了一种单相三线（143W）
电网连接photovoItaic（PV）逆变电源与功能
部分有源电力滤波器（武警部队），它不仅可以处理
光伏发电，但过滤电流谐波，提高功率因数。-This paper presents a single-phase three-wire (14 3W)
grid-connection photovoItaic (PV) power inverter with a feature
of partial active power filter (PAPF), which can not only deal with
PV power but filter current harmonics and improve power factor. Platform: |
Size: 888832 |
Author:林好烦 |
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Description: 本文研究了一种用于三相电压型并网逆变器的新型直接功率控制策略——预测直接功率控制（Predictive Direct Power Control，简称P-DPC）。重点讨论了P-DPC不同的电压矢量选择原则和电压矢量作用时间的处理方法，以降低低次电流谐波成分，获得更好的动、静态性能。-In this paper, a new direct method for three-phase voltage power grid-connected inverter control strategy- predictive direct power control (Predictive Direct Power Control, called P-DPC). Focused on the P-DPC different voltage vector selection principles and action time voltage vector processing method to reduce the low current harmonics components, better dynamic and static performance. Platform: |
Size: 559104 |
Author:刘明 |
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Description: Hysteresis inverters are used in many low and medium voltage utility applications when the inverter line current is required to track a sinusoidal reference within a specified error margin. Line harmonic generation from those inverters depends principally on the particular switching pattern applied to the valves. The switching pattern of hysteresis inverters is produced through line current feedback and it is not pre-determined unlike the case, for instance, of Sinusoidal Pulse-Width Modulation (SPWM) where the inverter switching function is independent of the instantaneous line current and the inverter harmonics can be obtained from the switching function harmonics. Platform: |
Size: 415744 |
Author:lamro
|
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Description: The gating signal for the 13-level hybrid inverter using SPWM technique is generated. This proposed ... the switching angles of inverter suppress the lower. order harmonics. ... elimination pulse width modulated technique based on. the foraging ... multilevel inverter (FCMLI) and (iii) cascaded H bridge Platform: |
Size: 18047 |
Author:suri270 |
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