High‐efficiency low‐noise pulse‐width modulation DC–DC buck converter based on multi‐partition switching for mobile system‐on‐a‐chip applications

2016 ◽  
Vol 9 (3) ◽  
pp. 559-567 ◽  
Author(s):  
Tai‐Ji An ◽  
Gil‐Cho Ahn ◽  
Seung‐Hoon Lee
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
High Efficiency ◽  
Low Noise ◽  
Buck Converter ◽  
Mobile System ◽  
Noise Pulse ◽  
System On A Chip

EFFECT OF PULSE WIDTH MODULATION ON DC MOTOR SPEED

2017 ◽  
Vol 5 (2) ◽  
pp. 42 ◽  
Author(s):  
Cosmas Tatenda Katsambe ◽  
Vinukumar Luckose ◽  
Nurul Shahrizan Shahabuddin
Keyword(s):  
Duty Cycle ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dc Motor ◽  
Buck Converter ◽  
Motor Speed ◽  
Push Button ◽  
Cycle Rate ◽  
Speed Controller ◽  
And Performance

Pulse width modulation (PWM) is used to generate pulses with variable duty cycle rate. The rapid rising and falling edges of PWM signal minimises the switching transition time and the associated switching losses. This paper presents a DC motor speed controller system using PWM technique. The PWM duty cycle is used to vary the speed of the motor by controlling the motor terminal voltage.The motor voltage and revolutions per minutes (RPM) obtained at different duty cycle rates. As the duty cycle increases, more voltage is applied to the motor. This contributes to the stronger magnetic flux inside the armature windings and the increasethe RPM. The characteristics and performance of the DC motor speed control system was investigated. In this paper, a PIC microcontroller and a DC-DC buck converter are employed in the DC motor speed controller system circuit. The microcontroller provides flexibility to the circuit by incorporating two push button switches in order to increase and to decrease the duty cycle rate. The characteristics and performance of the motor speed controller system using microcontroller was examined at different duty cycle rate ranging from 19% to 99%.

scholarly journals DC-DC Buck Boost Converter For Renewable and Biomedical Application based Real-Time IoT

2019 ◽  
Vol 8 (4) ◽  
pp. 328-336
Keyword(s):  
Pulse Width ◽  
High Efficiency ◽  
Boost Converter ◽  
Heart Beat ◽  
Current Control ◽  
Buck Converter ◽  
Raspberry Pi ◽  
Control Line ◽  
Light Load ◽  
Control Scheme

DC-DC buck boost converter is a conversion circuit using induced frequency inductors, switching.DC-DC converters dynamics was improved by using self calibrated preemptive current control. As, a result Preemptive concurrent control reduces capacitor size by 10x.DC DC buck converter with pulse width modulation.DC-DC buck converter with two step pulse width modulation was utilized for low power application by using delay, control line. Main motive of DC-DC buck converter with pulse width modulations obtains high linearity, high granularity. Conversion efficiency for Light load current was increased in buck converter by clocked hysteresis scheme. Power supplied to comparator was scaled to load easily. Conventional buck converter was integrated with LED to expand smart bulb. Main power from supply was decoupled by Non linear ramp control scheme preventing LED output flickering. Control scheme effectiveness was improved by small signal model. Three major characteristics of Light emitting diodes are improved lifetime, high efficiency, increased reliability, controllability. High brightness LED by multicell three phases was used for its lower cost. Heart beat was identified by using raspberry pi, system on chip with three stages in it namely Heart beat determination, Impedence, cardiography parameters. Accidents was restricted by this method.Overspeeding vehicles was identified was main goal of using complex proportional assessment method. Converting Rice husk into bio fuels was performed by thermo chemical processes. Rice hulk silica was utilized for fluorescent silica particles synthesis.

Desing and Implementation of a Microcontroller Based Buck Boost Converter as a Smooth Starter for Permanent Magnet Motor

2016 ◽  
Vol 1 (3) ◽  
pp. 566
Author(s):  
S. Ravi ◽  
Vitaliy Mezhuyev ◽  
K. Iyswarya Annapoorani ◽  
P. Sukumar
Keyword(s):  
Permanent Magnet ◽  
Input Signal ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Power Converter ◽  
Boost Converter ◽  
Buck Converter ◽  
Permanent Magnet Motor ◽  
Dc Power ◽  
The Given

<p>This proposal proposes a DC/DC Buck Boost converter which has been used as a smooth starter for a DC Permanent Magnet Motor. In the existing system the DC/DC Buck Converter is used which provide the output less than the input Signal. Using buck converter it is difficult to increase the value of the input signal. Hence DC/DC Buck- Boost Converter used from which it is possible to get both the increased and decreased output from the given input. Previously pulse width modulation signals with respective to motor voltage is used. However they produce variations in the voltage and current of the motor. The above problem is overcome by using DC/DC Power converter. The proposed system with reduction in size, reduced ripples and increase in speed makes the system to operate at both low and high power applications. The proposed system results in higher efficiency, reduces the ripple content and the stress. The results are validated through MATLAB/Simulink and real time implementation.</p>

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