scholarly journals Charger for NiMH batteries based on buck DC/DC converter

2014 ◽  
Vol 11 (3) ◽  
pp. 477-490
Author(s):  
Vladimir Lapcevic
Keyword(s):  
Power Electronics ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Voltage Drop ◽  
Battery Charging ◽  
Battery Chargers ◽  
Nimh Battery

In this paper is presented charger for NiMH battery types AA. Charger is realized by Buck DC/DC converter and microcontroller. Microcontroller controls the work of Buck DC/DC converter by pulse width modulation and by measuring the current of battery charging. The current of charging is held constant by power electronics, and the time of charging is set by the user dependent of capacity of the battery. Standard battery chargers enable the recharge of NiMH battery for few hundred times, because termination of charging is done when voltage drop on the battery is detected. The aim of this paper is to create charger which enables that NiMH battery is charged 1000 times.

Design of Portable On-Board Charger

2012 ◽  
Vol 229-231 ◽  
pp. 837-840
Author(s):  
Deng Liang Cheng ◽  
Wei Rong Jiang ◽  
Jian Wei Mei
Keyword(s):  
Pulse Width ◽  
Parallel Machines ◽  
Pulse Width Modulation ◽  
Control Mode ◽  
Constant Current ◽  
System Control ◽  
Single Chip ◽  
Battery Charging ◽  
Loop Control ◽  
Bus Voltage

To solve the key technology of automotive lithium battery charging system, a new kind of smart portable on-board charger is developed. This battery charger takes single-chip machine of freescale as system control chip, realizes closed-loop control of bus voltage by the voltage pulse width modulation chip TL494, realizes charger output with constant voltage, constant current and switch without disturbances by the current pulse width modulation chip UC3846, achieves master-slave control mode for multi–parallel machines through the CAN bus technology. In addition, the microcontroller program realizes the process monitoring and fuzzy PID regulation, the charging process has multiple intelligent protection and external regulatory functions. The experimental results show that with dual regulations of the software and hardware, the charger has the advantages of stable reliability, flexible operation and precise intelligence, an effective exploration of the battery charging technology is carried out.

Pulse Width Modulation in Power Electronics

10.1142/12217 ◽  
2021 ◽  
Author(s):  
Isaak Mayergoyz ◽  
Siddharth Tyagi
Keyword(s):  
Power Electronics ◽  
Pulse Width ◽  
Pulse Width Modulation

Design and analysis of customised pulse width modulation based dc–dc converter for EV battery charging application

2020 ◽  
Vol 13 (16) ◽  
pp. 3549-3559
Author(s):  
Manaswi Srivastava ◽  
Arun Kumar Verma ◽  
Pavan Singh Tomar
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Battery Charging

scholarly journals Development of simple solar charge controller using 8-bit microcontroller attiny85

2018 ◽  
Vol 67 ◽  
pp. 01018
Author(s):  
A.R. Wing Wira ◽  
Ananta Rezky ◽  
Andrew Bastian ◽  
Kresna Devara ◽  
Arief Udhiarto ◽  
...  
Keyword(s):  
Pulse Width ◽  
Major Part ◽  
Pulse Width Modulation ◽  
Voltage Drop ◽  
Measured Data ◽  
Battery Voltage ◽  
Control Current ◽  
Mode 2 ◽  
Independent Variable ◽  
Series Resistor

This paper present simple and inexpensive solar charge controller (SCC) using 8-bit microcontroller ATtiny85. The SCC using a pulse width modulation (PWM) signal to transistor and MOSFET to control current that generated by the microcontroller. The battery voltage state also monitored using a series resistor paralleled to the battery and the voltage drop connected to the microcontroller. The design of SCC consists of 3 major part i.e. microcontroller, current driver, voltage sensing. The purpose of measurement is to know the characteristics of 2 charging modes, mode 1 (one) and mode 2 (two), that occur in the system created. The measured data is the battery voltage as independent variable, and the solar panel’s voltage, the current that flow towards battery and the power provided for charging. Measurements are conducted from the battery voltage state of 7.84 V to 8.4 V. The results show that the solar charge controller using 8-bit microcontroller ATtiny85 was successfully managed to provide current and voltage according to expected design with 400 mA, 8.9 V for the first charging case and 150 mA, 12 V for the second charging case.

scholarly journals Implementation of a Smart Battery Charger Using LLC Resonant Converter

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
E.U. Nwosu
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Resonant Converter ◽  
Battery Charger ◽  
Battery Charging ◽  
Operational Conditions ◽  
Display Unit ◽  
Llc Resonant Converter ◽  
Terminal Voltage ◽  
Load Conditions

This research was influenced by the need to eradicate voltage selection error in manual battery-charging, as well as the necessity for getting more batteries charged within a short duration without compromising the cycle life of a battery. Minimizing human interference in charging of batteries as a means of making the process stress-free, safer and faster is also a motivation for this work. This paper presents a battery charger which takes accurate decisions by itself and eliminates poor charging parameters which can damage even brand new batteries. The battery charging unit automatically senses the battery terminal voltage(s), supplies appropriate charging voltage/current, and terminates charging process based on preset operational conditions of voltage, current and temperature. Key components of the developed prototype include PIC16F877A microcontroller chip, LLC resonant converter, and an LCD based display unit. The chip runs dedicated codes that control all tasks involved in the operation of the charger. Pulse-width modulation (PWM) technique was employed to control switching duty cycle which consequently varies the output of the converter and enables battery-charging from 6-volt to 48-volt. Before embarking on the actual constructions, simulations were done to evaluate the performance of the system. The model was subjected to tests under various load conditions and the results agreed with objectives of the research.

scholarly journals A Three-Level Universal Electric Vehicle Charger Based on Voltage-Oriented Control and Pulse-Width Modulation

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2375 ◽  
Author(s):  
Ali Saadon Al-Ogaili ◽  
Ishak Bin Aris ◽  
Renuga Verayiah ◽  
Agileswari Ramasamy ◽  
Marayati Marsadek ◽  
...  
Keyword(s):  
Digital Signal Processor ◽  
Distribution System ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Input Current ◽  
Special Focus ◽  
Renewable Energy Resources ◽  
Battery Charging

Electric vehicles (EVs) could be used to address the issues of environmental pollution and the depletion of non-renewable energy resources. EVs, which are energized by a battery storage system, are becoming attractive because they keep the environment clean. Furthermore, the cost of EVs is becoming cheaper. Thus, EVs will become a significant load on utility distribution system in the future. EV chargers play a significant role in the expansion of EVs. The input current of an EV charger with a high total harmonic distortion (THD) and a high ripple distortion of the output voltage can impact battery life and battery charging time. Furthermore, the high cost and large size of the chargers are considered other issues in EV development. This work presents the complete design process of a universal EV charger with a special focus on its control algorithms. In this regard, a novel control algorithm based on the integration of voltage-oriented control (VOC) and the sinusoidal pulse-width modulation (SPWM) technique is proposed to ensure effective Levels 1, 2, and 3 battery charging. A simulation of the universal EV charger was conducted and assessed in MATLAB–Simulink. Moreover, a laboratory prototype was constructed with a TMS320F28335 digital signal processor (DSP) programmed as the controller to validate its operation and performance. The findings show that the proposed charger is able to provide a controllable and constant charging voltage for a variety of EVs, with an input current of low total harmonic distortion (THD) and an almost unity power factor.

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