Power Factor Correction Using 8051

Topics: Power factor, Transformer, Capacitor Pages: 24 (5782 words) Published: May 19, 2013
It gives us an immense pleasure to write an acknowledgement to this project report, a contribution of all people who helped us realize it.
We take this opportunity to express our respectful regards to our beloved principal Dr.N.C.Hiremath for permitting us to do this project.
We express our deep sense of gratitude and appreciation to our beloved HOD Prof.S.B.Patil for this enthusiastic inspiration and amicable in all phases of our project.
With due respect we would like to express my sincere thanks to our project guides Prof.H.R.Zinage and Prof.S.M.Mukare for their sterling effort and timely giddiness, their patience in solving our doubts which kept cropping up in due course of our project needs special credits.

We heartily thank our coordinator Prof.O.B.Heddurshetti for his encouragement and support towards our academic and project work.
Our sincere thanks to all those people who have contributed to project in every step.
Shruthi S. Kurhade
Laxmi S. Chavan
Vanishree C. Hiremath
Naveen V. Nula

1. Introduction05
2. Objective06
3. Literature survey
4. Basic concept
5.1 Power factor
5.2 Power factor correction
5. Principle of design
6.3 Principle
6.4 Block Diagram
5. Modules
5.1 Power supply
5.2 ADC converter
5.3 Microcontroller
5.4 Port Assignment
5.5 Algorithm
5.6 Program
5.7 Flowchart
5.8 Relay driver
5.9 Relay
5.91 Relay circuit
5.10 Key Pad
5.11 LCD Display
5.11.1 Interfacing of LCD Display
6. APFC Unit
7. Advantages
8. Applications
9. Experimental Results
10. Conclusion
11. References
12. Appendix48
List of figures
Figure 1: Power tringle
Figure 2: Block diagram of microcontroller based automatic power factor controlling system Figure 3: Block diagram of power supply
Figure 4: Circuit diagram of power supply
Figure 5: Pin diagram of ADC
Figure 6: pin configuration IC 89c51
Figure 7: relay driver IC
Figure 8: Relay circuit
Figure 9: interfacing circuit of keyboard with 89c51
Figure 10: a typical LCD display
Figure11: Interfacing circuit of LCD with 89c51
Figure 12: capacitor bank

List of table
Table No 1: Relay operation

The Embedded Technology is now in its prime and the wealth of knowledge available is mind-blowing. Embedded technology plays a major role in integrating the various functions associated with it. This needs to tie up the various sources of the Department in a closed loop system.

This proposal greatly reduces the manpower, saves time and operates efficiently without human interference. This project puts forth the first step in achieving the desired target. With the advent in technology, the existing systems are developed to have in built intelligence.

Automatic power factor correction techniques can be applied to the industries, power systems and also households to make them stable and due to that the system becomes stable and efficiency of the system as well as the apparatus increases. The use of microcontroller reduces the costs.

1. Introduction
In the present scenario of technological revolution it has been observed that the power is very precious. The industrialization is primarily increasing the inductive loading. The Inductive loads affect the power factor so the power system looses its efficiency. There are certain organizations developing products and caring R&D work on this field to improve or compensate the power factor. In the present trend the designs are also moving forwards the miniature architecture; this can be achieved in a...
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