Closed-Loop Pulse-Width Modulation Microwave Heating With Infrared Temperature Control for Perfusion Measurement

2021 ◽  
Vol 70 ◽  
pp. 1-7
Author(s):  
Mohammad-Reza Tofighi ◽  
Anilchandra Attaluri
Keyword(s):  
Microwave Heating ◽  
Temperature Control ◽  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Perfusion Measurement

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.

scholarly journals Analysis of Sinusoidal Pulse Width Modulation Parameter Settings in High Precission Closed Loop Full Bridge Bipolar Inverters for High Voltage High Frequency Generator

Teknik ◽  
2020 ◽  
Vol 41 (1) ◽  
pp. 55-61
Author(s):  
Abdul Syakur ◽  
Arifin Wibisono
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Pulse Width ◽  
Large Scale ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Waste Treatment ◽  
Electrical Energy ◽  
Loop Control ◽  
Sinusoidal Pulse Width Modulation

The application of high voltage becomes more important and wider. High voltage is needed in the process of reducing air contaminants, waste treatment, sanitation, disinfecting microorganisms, testing for insulating high voltage equipment, and transmitting electrical energy. The problem of high voltage AC generation system is still in a large scale, static, not portable, and very expensive. This paper presents an analytical design of a high-voltage AC high-frequency based on power electronic. It is portable, less expensive, and eaasier to control the amplitudo and frequency. The application of the Full Bridge Bipolar Inverter topology with the Sinusoidal Pulse Width Modulation switching method provides variable sinusoidal AC voltage outputs (Vo) on its amplitude and frequency. The Tesla Coil Transformer amplifies the amplitude in accordance with the classification of the high voltage AC in the order of Kilo Volt. The Closed Loop control system in the Bipolar Inverter Full Bridge topology provides high accuracy results between the given setting values and the actual amplitude output and the expected high-frequency AC voltage. Analysis of the SPWM switching pattern parameter settings shows stability for several loading variations

Analysis and design of a PWM chopper-on/off control via a second order filter

2014 ◽  
Vol 11 (2) ◽  
pp. 181-186 ◽  
Author(s):  
Abdelouahab Zaatri ◽  
Souad Belhour
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Theoretical Study ◽  
Second Order ◽  
Power Supplies ◽  
Analysis And Design ◽  
System Parameters ◽  
Order Filter ◽  
The Relationship

This paper presents the analysis of a nonlinear on/off control system including a filter of a second order in the closed loop. The proposed system is capable of generating a pulse width modulation which is used to design and built up a PWM (Pulse Width Modulation) chopper dedicated to regulate fluctuating power supplies such as photovoltaic, wind turbine systems; etc. The use of the second order filter aims to compensate the output against the fluctuations of irradiation as well as the variation of the load. The study essentially focuses on determining the relationship between the pulse durations with respect to system parameters and technological requirements. The theoretical study is followed by a simulation of a DC-DC chopper.

A closed-loop interface for capacitive micro-accelerometers with pulse-width-modulation force feedback

2017 ◽  
Vol 94 (2) ◽  
pp. 195-204 ◽  
Author(s):  
Tao Yin ◽  
Zhenhua Ye ◽  
Guocheng Huang ◽  
Huanming Wu ◽  
Haigang Yang
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Force Feedback

scholarly journals Analytically Modeling, Design and Analysis a Nonlinear Controller for a STATCOM operations

2018 ◽  
Vol 7 (4) ◽  
pp. 221
Author(s):  
J. K. Moharana
Keyword(s):  
Pulse Width ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Closed Loop Control ◽  
Nonlinear Controller ◽  
Performance Indices ◽  
Static Synchronous Compensator ◽  
Loop Control ◽  
Relevant Variables

The concept of H Control is extended, in principle, to the SVPWM (Space Vector Pulse Width Modulation) based inverter switching of a STATCOM (STATic synchronous COMpensator) device. The SVPWM assures a greater value of modulation factor in the undermodulation as well as the overmodulation range compared to SPWM (Sine Pulse Width Modulation) i.e. a much higher fundamental content. In the present work, the STATCOM has been modeled and its model is nonlinear in  (phase angle between fundamental of system voltage and output voltage of STATCOM. The effect of increased modulation index and lower harmonic distortion has been studied through simulation w.r.t. different performance indices and dynamic response of relevant variables. A PI and an H Controller have been designed for closed-loop control of the system. It is found through simulation that H controller gives better response than PI controller for nonlinear system.

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