In the present work the authors propose a solar powered cascaded multilevel inverter which can be integrated with the grid. To connect the solar photovoltaic system to the grid a dc to ac conversion of power is required which is made possible using a multilevel inverter, but the power electronic switches introduces harmonics during the switching process. Thus the investigators propose a selective harmonic elimination technique using Genetic Algorithm and Differential Evolution Optimization Techniques. The performance comparisons of the proposed ....etc

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Pulse Width Modulation


Introduction
The explanation of this issue is applied to the following conditions:
Application MCU: 3803H Group (e.g. M38039FFHHP)
Oscillation Frequency: 8 MHz

Description of module used

Figure 1 shows a block diagram of PWM module. In this sample task, the following features are used:
Automatic generation of PWM output by hardware, without software intervention.
Period and duty cycle of PWM output can be modified.
If the PWM reg ....etc

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: RADHIKA U.K(42)
: REMYA JOHNY(44)
: SANGEETHA THOMAS(46)
: SUBIN P SUNNY(54)

CONTENTS

INTRODUCTION
OBJECTIVE
BLOCK DIAGRAM
CIRCUIT DIAGRAM
WORKING
COMPARITIVE STUDY OF CIRCUIT WITH AND WITHOUT PWM
FEATURES
ADVANTAGES AND DISADVANTAGES OF LED
COMPARISON OF LED LAMPS WITH OTHER LIGHTING TECHNOLOGIES
CONCLUSION
FUTURE SCOPE
REFERENCES

INTRODUCTION
Growing demand for the saving of electricity.
Failure in power supply causes difficulty and inconvenience.
An automatic ....etc

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ABSTRACT
This paper focused on the development of capacitor voltage
balancing methods in a flying capacitor multilevel inverter
(FCMLI) fed induction motor drive. For improving the
performance of flying capacitor multilevel inverter, a switching
pattern selection scheme is implemented. The proposed method
has been designed a seven-level flying capacitor multilevel
inverter by using sinusoidal pulse width modulation technique.
The selected pattern has been exposed to give superior
performance in load voltage, total harmonics dist ....etc

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We switched from a legacy 80C51 to the AT89C51RC and the code runs fine except the PWM. We are using the PCA and port 1.3 but no toggling is seen. Is there something we need to change in the code? ....etc

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