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Showing 1 to 20 of 56 for “"pulse width modulation (PWM)"”.
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Modeling and Simulation of a Chemical Injection System
<p>Pulse width modulation (PWM) technology has recently been applied to chemical injection systems. However, its impact on the performance of sprayers is not well understood. Although the behavior of chemical injection systems in constant-rate application has been studied intensively, little …
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Development of power factor correction using boost converter circuit
… for Code Compressor Studio software (CCS), Pulse Width Modulation (PWM), Texas Instrument (interface), gate driver, power factor correction circuit in boost circuit topology and rectifier circuit, load and sensor are the main parts in this project. Texas Instrument works as the interface …
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Valve characterization to implement feed-forward control of hydraulically actuated joints
… of a Hydraforce SP08-47CL valve given a specific pulse-width modulation (pwm) duty cycle. With a description of valve behavior, a feed-forward term can be implemented in the positional control loop of a hydraulically actuated robotic prototype. In order to isolate valve behavior, a test bed …
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All Digital FM Demodulator
… using any multipliers. The topology uses a Pulse width modulation (PWM) block to avoid the need for a DAC. The Xilinx virtex-7 FPGA has been used as the reference device for the work. The circuit is validated through behavioral simulations and the results conclude the proposed circuit …
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Development of repetitive current controller using raspberry PI for 3 phase active power filter for nonlinear load improvement
… The Raspberry Pi board is used to supply the pulse width modulation (PWM) signal to the APF. Lastly, the repetitive controller is designed so that the PWM generated is the same signal to be compensated by the APF and enhanced distorted current in power supply into the pure AC waveform. In this …
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An improved perturbation and observation in MPPT control using buck-boost converter in solar panel
… and Arduino board device that generates a Pulse Width Modulation (PWM) signal. In order to determine the effectiveness of this project, few testings have been conducted. Finally, the control is assessed through hardware test experiment. The results of simulation and hardware experiment …
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DC-DC converters with high efficiency over wide load ranges
… the regulator automatically switches between Pulse Frequency Modulation (PPM) and Pulse Width Modulation (PWM), and also automatically selects the optimum switching MOSFET. The current sensing is done without an additional current sense resistor. PFM mode operation is synchronous to allow …
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PWM strategies for multilevel multiphase AC drives
Pulse width modulation (PWM) strategies for multilevel multiphase ac drives have been analysed in this thesis. The large amount of published work in the area of multiphase drives recognises their advantages compared to the standard three-phase solutions. Some of them arc improved power sharing …
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Preliminary investigation on optical cavity-based biosensor using double-sided tape.
… can also be used to actively control the cavity width using pulse width modulation (PWM)-based actuation. Cavity width adjustment was demonstrated through beam profile movement (maximum 1.44 mm), optical resonance, and by reducing the time required to achieve the optimal cavity width region …
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Development of repetitive current control for lead acid battery using arduino
… Support Package library in order to generate the pulse width modulation (PWM) signals.The project with the aid of MATLAB software and Arduino is able to develop repetitive current control for lead acid battery
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Design of high fidelity pulse width modulation inverter
Pulse-width modulation (PWM) is well established in power electronics as a basis for inverters with sinusoidal output voltages. It provides two crucial advantages: high power delivery efficiency and easy digital-to-analog demodulation. Thus PWM can be applied in audio signal processing chain as a …
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All-Digital Audio Amplifier
… information digitally and generates a two-level pulse-width modulation (PWM) signal that is amplified by a switching power stage and finally low-pass filtered before it is sent to a speaker. The purpose of the digital signal processing (DSP) portion of the system is to transform the original …
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Harmonic elimination by switching angle optimization technique for multilevel inverter
… low level of total harmonic distortion (THD). A pulse width modulation generators have been connected to switching devices of 7-level CHBMLI. The reference waveform for pulse width modulation (PWM) generator is considered to be a sinusoidal wave to obtain ideal AC output voltage waveform from the …
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Comparison Between PWM and SVPWM Three-Phase Inverters in Industrial Applications
… first inverter is a three-phase sinusoidal pulse width modulation (PWM) inverter that generates gate-control signals using a sinusoidal wave source. It is shown that pulse width modulation utilizes a simpler approach to convert DC power into AC.</p><p>The second inverter is a three-phase …
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Modeling and Implementation of Controller for Switched Reluctance Motor With Ac Small Signal Model
… schemes, open-loop Hysteresis and closed-loop pulse-width-modulation (PWM) have been used for the switched reluctance motor (SRM) current controller. The Hysteresis controller induces large unpleasant audible noises because it needs to vary the switching frequency to maintain constant …
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Study and Improvement of Single-Stage Power Factor Correction Techniques
… The generalized structures of the present pulse-width-modulation (PWM) integrated single-stage power factor correction (PFC) converters are presented. The typical PFC cells in the single-stage PFC converter are identified. After that, the necessary PFC condition is derived and verified to …
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Second Generation Tactile Imaging System for Mechanical Properties Estimation
… circuit using a constant current driver and a Pulse Width Modulation (PWM) dimming to stabilize the light brightness. After confirming the ability to obtain clearer images of the target, we compared the newly revamped TIS with the older version. The results showed that the images are clearer …
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Development of PID voltage control for DC motor using arduino
… MATLAB/Simulink Software version 2013a. The Pulse Width Modulation (PWM) signals generated from MATLAB/Simulink model will be downloaded into Arduino microcontroller. Arduino microcontroller board is an interfacing device between MATLAB/Simulink model and actual hardware. The PWM signals from …
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Digital speed and position control system incorporating an Incremental encoder
… provide the feedback speed signal to controller. Pulse Width Modulation (PWM) technique is used where its signal is generated in microcontroller. The microcontroller will send PWM signal to motor driver, vary the voltage supply of motor to maintain at constant speed. While position control system …
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Development of three phase back to back converter with current flow control using raspberry Pi microcontroller
… reference current by creating and changing the pulse width modulation (PWM) signals. The PID controller is developed and simulated by using MATLAB/Simulink software and then implemented to the hardware by using Raspberry Pi Microcontroller. The result from the simulation shows that, the load …
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