Splitting dynamics of ferrofluid droplets inside a microfluidic T-junction using a pulse-width modulated magnetic field in micro-magnetofluidics

Soft Matter ◽  
2021 ◽  
Author(s):  
Mohamad Ali Bijarchi ◽  
Mahdi Dizani ◽  
Mohammadmahdi Honarmand ◽  
Mohammad Behshad Shafii
Keyword(s):  
Magnetic Field ◽  
Pulse Width ◽  
Pulse Width Modulated ◽  
Droplet Splitting

A novel, simple, and robust ferrofluid droplet splitting in microfluidics employing a pulse-width modulated magnetic field is proposed.

scholarly journals Analysis and implementation of electricity generation of 1000VA using wind turbine

2020 ◽  
Vol 39 (2) ◽  
pp. 472-483
Author(s):  
A.A. Okandeji ◽  
M.B. Olajide ◽  
Z.O. Jagun ◽  
D.S. Kuponiyi ◽  
T.A. Aderanti
Keyword(s):  
Magnetic Field ◽  
Wind Turbine ◽  
Pulse Width ◽  
Electricity Generation ◽  
Output Voltage ◽  
Design Work ◽  
Discharge Characteristics ◽  
Dc Voltage ◽  
Pulse Width Modulated ◽  
Selection Of

The project involved the design and construction of a three-blade wind turbine, selection of generator by consideration of the available wind speed and the maximum generated voltage per revolution, and assembly of the pulse width modulated inverter with microontroller based status display and low battery shutdown system. On completion of the work, tests were conducted and the result shows that the design work was very good, the output of the generator was good enough to charge the batteries and the inverter performed an excellent task of converting the direct current (DC) voltage available in the battery to alternating current (AC) at 230V 50Hz 20”. Furthermore, results from the discharge characteristics of the battery shows that as the battery is being used up, the output voltage remains constant. Keywords: wind, blade, turbine, magnetic field, battery, oscillator, inverter, controller

Pulse-Width Modulated Amplifier for DC Servo System and Its Matlab Simulation

2015 ◽  
Vol 9 (1) ◽  
pp. 625-631
Author(s):  
Ma Xiaocheng ◽  
Zhang Haotian ◽  
Cheng Yiqing ◽  
Zhu Lina ◽  
Wu Dan
Keyword(s):  
Mathematical Model ◽  
Transfer Function ◽  
Input Signal ◽  
Pulse Width ◽  
Rotation Speed ◽  
Servo Motor ◽  
Matlab Simulation ◽  
Pulse Width Modulated ◽  
Signal Changes ◽  
The Relationship

This paper introduces a mathematical model for Pulse-Width Modulated Amplifier for DC Servo Motor. The relationship between pulse-width modulated (PWM) signal and reference rotation speed is specified, and a general model of motor represented by transfer function is also put forward. When the input signal changes, the rotation speed of the servo motor will change accordingly. By changing zeros and poles, transient performance of this system is discussed in detail, and optimal ranges of the parameters is recommended at the end of discussion.

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