presented by:
Wayne_Chen


DC Fan Speed Control PWM Signal Introduction
1. Speed Control Fan Structure
1-1. Use ON/OFF contr
Advantage：
Easy design and control method
Price cheaper
Disadvantage :
I. Power Dissipation is a design issue.
II. Not use friendly.
2. What is PWM Signal ?
PWM(Pulse Width Modulation): It’s a fixed frequency and pulse modulated for fan speed control.
Whenever change the duty cycle, the fan speed will be changed by system requirement
 The Purpose are :
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how to load or import ecg.mat file from workspace to simulink ....etc

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Introduction to Pulse Width Modulation (PWM)
In this technique several pulses are produced in each half – cycle but the width of the pulses
is not the same as in case of multiple – pulse width modulation, however the width of each pulse is
varied in accordance with the amplitude of the sine wave reference voltage. The width of the pulse
at the center of the half – cycle is maximum and decreases on either side. The figure 6(a) shows the
generation of the output signal by comparing a sinusoidal reference sign ....etc

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Abstract:
The number of industry applications in which induction motors are fed by static frequency inverters is growing fast and, although much has already been done within this field, there is still a lot to be studied/understood regarding such applications. The advance of variable speed drives systems engineering increasingly leads to the need of specific technical guidance provision by electrical machines and drives manufacturers, In this paper we have studied and developed a simulink model with PWM inverter and find out the vario ....etc

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sir i m BTECH,FINAL YEAR electrical engineering student from IET,LUCKNOW i m working with the pid control based single phase inverter design project so i m in need of simlink model of pwm inverter with steps for making my project so from your side i need your help .
pawan sharma ....etc

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pleae send me the reduction of harmonics in power systems or power quality improvement by wavelet transformation in matlab simulink.. ....etc

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Abstract Test card for color TV is a widely used method to evaluate the quality of a TV set directly. We have made a test signal generator (which can also generate synchronizing (abbreviated to sync hereafter) signals) mainly based on microprocessor Z-80. Taking the advantage of microprocessor programming, combining with the technique of microprocessor, digital circuits and analogue devices, we use software as far as possible to generate signals directly or to simplify the controlling circuits. Those signals, such as composite sync signal, bla ....etc

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how to import a data from ecg.mat form workspace to simulink ....etc

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Sir/Madam
Can i get the information regarding the above mentioned project topic. ....etc

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PWM Signal Generators

1. Introduction
PWM, or Pulse Width Modulation, is a method of controlling the amount of power to a load without having to dissipate any power in the load driver.
Imagine a 10W light bulb load supplied from a battery. In this case the battery supplies 10W of power, and the light bulb converts this 10W into light and heat. No power is lost anywhere else in the circuit. If we wanted to dim the light bulb, so it only absorbed 5W of power, we could place a resistor in series which absorbed 5W, ....etc

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