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

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.

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Implementation of a Smart Battery Charger Using LLC Resonant Converter

UNIOSUN Journal of Engineering and Environmental Sciences ◽

10.36108/ujees/0202.20.0280 ◽

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.

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

Energies ◽

10.3390/en12122375 ◽

2019 ◽

Vol 12 (12) ◽

pp. 2375 ◽

Cited By ~ 8

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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Charger for NiMH batteries based on buck DC/DC converter

Serbian Journal of Electrical Engineering ◽

10.2298/sjee1403477l ◽

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.

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The 1-Bit Instrument

Journal of Sound and Music in Games ◽

10.1525/jsmg.2020.1.1.44 ◽

2020 ◽

Vol 1 (1) ◽

pp. 44-74

Author(s):

Blake Troise

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Interleaving Techniques ◽

Sonic Environment

The 1-bit sonic environment (perhaps most famously musically employed on the ZX Spectrum) is defined by extreme limitation. Yet, belying these restrictions, there is a surprisingly expressive instrumental versatility. This article explores the theory behind the primary, idiosyncratically 1-bit techniques available to the composer-programmer, those that are essential when designing “instruments” in 1-bit environments. These techniques include pulse width modulation for timbral manipulation and means of generating virtual polyphony in software, such as the pin pulse and pulse interleaving techniques. These methodologies are considered in respect to their compositional implications and instrumental applications.

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