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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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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Presented By:
C. K. Sao, P. W. Lehn, M. R. Iravani, and J. A. Martinez
Abstract
A benchmark system for studying the sinusoidal pulse-width-modulated distribution-static synchronous compensator (D-STATCOM) is proposed. A simple multifunction controller is provided to offer dc bus voltage control, power factor correction, and ac voltage control. Simulation results are presented and compared to experimental results obtained from a 10-kVA laboratory D-STATCOM. Excellent agreement between simulation and experimental results is obtained, ....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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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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Abstract:
During a long time, permanent magnet synchronous motor (PMSM) were only reserved for some
specific applications, however, recently, these machines are becoming more used due to the powerful magnetic
characteristic of the rare earth, being used in different areas. Recently several researchers have proposed
implementations combining the use of permanent magnet synchronous motor with the direct torque control (DTC)
technique offering a quick and precise control. The present work combines these techniques and it proposes the ....etc

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to get information about the topic direct torque control ppt of pmsm related topic refer the page link bellow

http://seminarsprojects.net/Thread-direct-torque-control-of-induction-motor

http://seminarsprojects.net/Thread-direct-torque-control-for-matrix-converter-fed-three-phase-induction-motor-with-hybri

http://seminarsprojects.net/Thread-direct-torque-control-of-a-permanent-magnet-synchronous-motor-with-pulse-width-modula

http://seminarsprojects.net/Thread-robust-sensorless-direct-torque-control-of-induction-motor-based-on-mras?pid=190 ....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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for the techinical ppt i want fpga based sine pwm waveform for solar inverter
[email protected] dis my id plz send ppt ....etc

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to get information about the topic PWM based Inverter fed Induction MotorIntroduction to Pulse Width Modulation full report refer the page link bellow
http://seminarsprojects.net/Thread-pwm-based-inverter-fed-induction-motorintroduction-to-pulse-width-modulation-pwm-in ....etc

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