Non-linear harmonic reduction pulse width modulation (HRPWM) for the arbitrary control of transducer-integrated switched excitation electronics

2014 ◽  
Author(s):  
David Cowell ◽  
Peter Smith ◽  
Sevan Harput ◽  
James McLaughlan ◽  
Steven Freear
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Reduction ◽  
Non Linear

Position Control of Hydraulic Actuators Using Fuzzy Pulse Width Modulation (PWM)

2015 ◽  
Vol 735 ◽  
pp. 294-298 ◽  
Author(s):  
Wei Ying Lai ◽  
Nurfarahin Onn ◽  
Collin Howe Hing Tang ◽  
Mohamed Hussein
Keyword(s):  
Fuzzy Logic ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Solenoid Valve ◽  
Operating Conditions ◽  
Hydraulic Actuators ◽  
Non Linear ◽  
Fuzzy Logic Approach ◽  
Logic Approach ◽  
Non Linear System

Hydraulic actuators are widely employed for industrial automation for its high power over weight ratio, functionality in tough operating conditions and low cost. However, the dynamics of hydraulic systems are non-linear and the system subjected to non-smooth and discontinuous non-linearities due to directional change of valve opening, friction, valve overlap and changes of hydraulic pressure acted on valve spool. Taking into account the effect of nonlinear parameter variations such as bulk modulus, compressibility of oil or viscosity of oil, fuzzy logic approach is chosen. Fuzzy control can adapt the inconstant working condition and non-linear system alongside of its robustness. For PWM controlled hydraulic component such as solenoid valve, effective approximation of the flow properties in a solenoid valve is essential. In this paper, the effect of fuzzy logic approach incorporated on pulse width modulation (PWM) controlled hydraulic system is to be investigated and experimentally verified.

scholarly journals Three Level Inverter Controlled UPFC for Harmonic Reduction using Space Vector Pulse Width Modulation Technique

2020 ◽  
Vol 9 (5) ◽  
pp. 734-738
Keyword(s):  
Pulse Width ◽  
Power Flow ◽  
Pulse Width Modulation ◽  
Unified Power Flow Controller ◽  
Power Transfer ◽  
Harmonic Reduction ◽  
Switching Pattern ◽  
Transfer Capability ◽  
Power Quality Improvement ◽  
Power Flow Controller

Unified Power Flow Controller (UPFC) is one of the most important device in FACTS family, this device in this work is used for power quality improvement. In this paper three level inverter is proposed for UPFC for the reduction of harmonics and for the enhancement of power transfer capability. SVPWM technique decides switching pattern of three level inverter. Therefore, in this paper this method is applied for controlling the three level inverter output. The proposed method is applied on four bus system and results are compared with UPFC without three level inverter. Results demonstrated that the proposed method effectively decreasing the harmonics and increasing the power transfer capability.

Non‐linear adaptive hysteresis band pulse‐width modulation control for hybrid active power filters to reduce switching loss

2015 ◽  
Vol 8 (11) ◽  
pp. 2156-2167 ◽  
Author(s):  
Lei Wang ◽  
Chi‐Seng Lam ◽  
Man‐Chung Wong ◽  
Ning‐Yi Dai ◽  
Keng‐Weng Lao ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Active Power ◽  
Switching Loss ◽  
Active Power Filters ◽  
Power Filters ◽  
Non Linear ◽  
Modulation Control

scholarly journals Modified PWM Technique for Harmonic Reduction

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Alireza Hoseinpour ◽  
Reza Ghazi
Keyword(s):  
Control Strategy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Reference Signal ◽  
Space Vector Modulation ◽  
Shunt Active Filter ◽  
Harmonic Reduction ◽  
Reference Signals ◽  
Simulation Results ◽  
Vector Modulation

This paper presents a Shunt Active Filter (SAF) based on the Variable Index Pulse Width Modulation approach. In the proposed method of Pulse Width Modulation (PWM), the triangular wave is derived by integration of the reference signals. This method introduces two basic advantages; the first one is that the triangular signal contains the information of the signal to be obtained in output and the second advantage is that its amplitude is varied in proportion to the amplitude of the reference signal. Therefore, in this PWM method, the modulation index is varied according to the variation of the reference signal, so it is termed as Variable Index Pulse Width Modulation. In order to demonstrate the validity of the proposed method, the obtained simulation results are compared with results of the Space Vector Modulation (SVM) approach. Furthermore, it is shown that in the case of nonsinusoidal voltages, the SAF with the proposed control strategy can provide the filtering action. This method is quite easy to implement and requires lower circuitry. The results show that the proposed method can satisfy the IEEE-519 standard regarding the reduction of harmonics.

scholarly journals Harmonic Reduction in Multilevel Inverter Based on Super Capacitor as a Storage

2015 ◽  
Vol 16 (3) ◽  
pp. 520
Author(s):  
Mohammed Rasheed ◽  
Rosli Omar ◽  
Marizan Sulaiman
Keyword(s):  
Distribution System ◽  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Super Capacitor ◽  
Harmonic Reduction ◽  
Ieee Standard

Cascaded H-Bridge multilevel inverter has become more attractive to generate high power in an electrical distribution system. This paper discusses the control of five level cascaded H-bridge multilevel inverter with super capacitor as a Dc energy storage. The control of the multilevel inverter using PI and space vector pulse width modulation (SVPWM) controllers based on the modelling and Simulink of cascaded H-bridge can observe the effectiveness of the proposed control to reduce harmonic contents of the multilevel inverter output. High frequency ripple from the inverters can be removed from the system using low voltage filter. Total harmonic distortion (THD) for both current and voltage is quite low to meet the IEEE standard. Modelling of the system has been done using MATLAB/Simulink.

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