scholarly journals Recovery Current Sinusoidality Distortion in the Control System of Forced Discharge of Batteries into the Mains

2020 ◽  
Vol 26 (4) ◽  
pp. 540-554
Author(s):  
S. S. Frolov ◽  
◽  
D. A. Shatilov ◽  
Keyword(s):  
Control System ◽  
Electromotive Force ◽  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Universal System ◽  
Current Function ◽  
Active Rectifier ◽  
Storage Batteries ◽  
The Relationship

The requirements for the reverse recovery current sinusoidality are high. Therefore, when developing programs for microcontrollers for a universal system of pulse-width modulation of the recovery current, it is important to have information on the dependences of the sinusoidality distortion degree on the relationship between the total electromotive force of the battery and the mains voltage, the amplitude of the recovery current, the inductance of the active rectifier coil, through which it flows, as well as between the frequencies of the network and the control PWM signal. The results of research into the development of a microcontroller modulation system for a routine forced (training or diagnostic) discharge of storage batteries into a single-phase network are presented. The sought expressions for the dependences of the sinusoidality distortion degree are obtained on the basis of the results of the spectral transformation of the regenerative current function obtained in MathCAD when the latter is formed by the control signal with single-stroke double-sided PWM-2.

scholarly journals Comparative investigations on different types of inductors in single-phase inverter

2021 ◽  
Vol 2107 (1) ◽  
pp. 012051
Author(s):  
M. Z. Aihsan ◽  
A. M. Yusof ◽  
Hasliza A Rahim ◽  
B. Ismail ◽  
W. A. Mustafa ◽  
...  
Keyword(s):  
Pulse Width ◽  
Single Unit ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Bridge Circuit ◽  
Experimental Assessment ◽  
Phase Inverter ◽  
Different Types ◽  
Single Phase Inverter ◽  
Validation Of Results

Abstract This article organized in two sections where it compares the performance of single-phase inverters using various types of inductors with differences modulation technique of pulse width modulation (PWM). Not all inductors perform the same function, even the inductance value is the same. The study will investigate the capability of each inductor on its performance to convert the unfiltered AC voltage into filtered sinusoidal AC voltage. The drum core and toroidal core inductors were used in this investigation. For both inductors, the performance will be analyzed based on Bipolar and Unipolar switching schemes in a single unit H-bridge circuit. The validation of results are through experimental assessment only and it will be evaluating the shape of sinusoidal AC voltage and the content of total harmonics distortion in the AC voltage for both inductors.

scholarly journals A Topology Synthetization Method for Single-Phase, Full-Bridge, Transformerless Inverter with Leakage Current Suppression Part I

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 434 ◽  
Author(s):  
Xiumei Yue ◽  
Hongliang Wang ◽  
Xiaonan Zhu ◽  
Xinwei Wei ◽  
Yan-Fei Liu
Keyword(s):  
Leakage Current ◽  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Circuit Model ◽  
Double Frequency ◽  
Highly Efficient ◽  
Sinusoidal Pulse Width Modulation ◽  
Derivation Procedure ◽  
Bridge Topologies

Single-phase full-bridge transformerless topologies, such as the H5, H6, or the highly efficient and reliable inverter concept (HERIC) topologies, are commonly used for leakage current suppression for photovoltaic (PV) applications. The main derivation methodology of full-bridge topologies has been used based on both a DC-based decoupling model and an AC-based decoupling model. However, this methodology is not suited to the search for all possible topologies, and cannot verify whether they are inclusive. Part I of this paper will propose a new topology derivation methodology based on unipolar sinusoidal pulse width modulation (USPWM) to search all possible full-bridge topologies for leakage current suppression. First of all, a unified circuit model is proposed, instead of the DC- and AC-based models. Secondly, a mathematic method called the MN principle is then proposed to search for all possible topologies, and a derivation procedure is provided. It was verified that all existing topologies could be found using the proposed method; furthermore, seven new topologies were derived. The proposed topology derivation methodology is extended to search topologies under Double-Frequency USPWM (DFUSPWM). Twenty topologies under USPWM and four topologies under DFUSPWM have been derived.

Designing of Robot Gamelan Music using ATmega 16 Microcontroller

2017 ◽  
Vol 6 (2) ◽  
pp. 121
Author(s):  
Handri Jir Azhar ◽  
Ferry Hadary ◽  
Syaifurrahman Syaifurrahman
Keyword(s):  
Control System ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Pd Control ◽  
Rotary Encoder ◽  
Motor Velocity

This paper presents a robot concept which is the robot can play the instrumental Gamelan music. Gamelan is a percussive instrument. Instrumental Gamelan music keys are consist of 2 octaves in 15 tones. Robot Gamelan music is using proportional-derivative (PD) control system. PD control of the robot is by controlling DC gear motor position to desired Gamelan key position. Robot Gamelan music using ATmega 16 microcontroller as a controller. Feedback of PD control is using magnetic rotary encoder (MRE) sensor. PD control is using the constant. The constant functions of PD control are determining the pulse width modulation (PWM) toward DC gear motor velocity in order to reposition a gamelan key position and pushing down the errors.

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