Design of Dc Motor Driver for Solar Tracking program

Design of DC Motor Driver for Solar Tracking program

Abstract-solar trackers rely on a direct current (DC) motor control circuit to control the movement of the solar panels. Conventional DC motor drivers are used in solar tracking system is not an option for speed and torque control. Why does DC motor fixed speed to either too fast or too slow tracking motion. Usually, the output torque is set to maximum. If the load (weight of solar panels) is small, the maximum torque is underutilized and therefore energy is wasted. So, a fully adjustable DC motor driver for solar tracking system shows great potential for commercialization as much energy efficient DC motor control circuit can improve the overall efficiency of the solar tracker. Fewer solar panels are needed when they are linked to high efficiency solar tracking system, which will be reflected to lower system. Therefore will be improved engine driver cause significant impact the solar energy industry. Proposed DC motor driver is fully adjustable in terms of speed and torque. Speed and torque of the engine is directly proportional to the output voltage and the output current of the DC motor driver, respectively. Adaptive control of the output voltage and current is possible by installing algorithm in microcontrollers of DC motor driver and it can be reprogrammed according to the requirement. Control speed do solar tracking system to track the Sun more accurately and torque control saves energy.

the converter is used to step down the voltage to reduce the rotational speed of the Solar Panel [4].

Fig. 1: block diagram of motor driver

I.

INTRODUCTION

Solar tracking system is used to track the position of the Sun in order to get the maximum energy of the solar panel is aligned perpendicular to the incidence of sunlight [1, 2, 3, 12, 13]. Solar panels need to move along with the direction of sunlight during the ...

Essay on Fahrenheit 451

"Fahrenheit 451"

Description of Montag, day 1:

On the first day of Ray Bradbury's dystopian novel "Fahrenheit 451" seems to be the awakening of the protagonist Guy Montag. After fulfilling his duty as a firefighter, what means that he has to burn books, he meets the 17-year-old girl, Clarisse McClellan, that changes his life. She reflects things and thoughts he was dissmissed in the past, and asked him questions he cannot answer. She, definitely a thinker and philosopher asks why, rather than how, what annoys him much. Because of her, he realizes that there is something important missing.
His happiness is just an illusion.
Although trying to dismiss thoughts about Clarisse's words, she has left a big impression.
Later at home, he finds his wife Mildred almost dead after trying to commit suicide by taking sleeping pills. He does not know why she did it, but he was very shocked and surprised.
Since PayPal two operators of hospital acute new blood with a machine. There are too many cases so that the machines need to replace doctors. The guy realizes that people are strangers to him, while the world is changing, and everything changes with the world.

Characterization of guy Montag:

Guy Montag is the protagonist of the dystopian novel "Fahrenheit 451" by Ray Bradbury first published in 1953.
He is a 30-year-old firefighter, whose profession it is to burn books.
Guy Montag is named after a paper manufacturing company.
Montag is a character, which is easily influenced by others.
Although he is clearly a hero, whose actions can be sympathized by readers, (because he is sensitive, compassionate and self reflect) his character is too naïve and simplistic, and his actions are not controlled or coordinated, what makes him such a stupid.
His character seems to change with the times.

At the beginning of the action like he sees things burn, (p. 9; ll. 1-3) "it was a pleasure to burn. It was a pleasure to see things eaten ...

How to smoke a brisket

The brisket is defined
Brisket is cut from the breast of a side of beef. Every beef carcass reproduce two whole briskets.
According to USDA institutional meat purchase Standard (IMP), a beef brisket as it has fallen from a side of beef "contains the anterior end of the sternum bone, the deep pectoral muscle, supraspinatus muscle. Proof of the Gristle moment of the first rib and sternum and cross section of 4 rib bones to be present. " You never find this ben brisket in the meat in a U.S. supermarket.
The whole brisket you buy Grill is what IMPS calls "beef brisket, boneless, deckle-off." IMPS defines it as follows: "all bones and cartilage shall be removed. Deckle (hard fat and intercostal meat on the inside surface) shall be removed on the natural seam exposing the lean surface of the deep pectoral muscle. The inside lean surface shall be trimmed practically free of fat. "The word" intercostal "refers to meat between the rib bones.
Deep pectoral muscle (the "within lean surface") is commonly referred to as the brisket flat, while the supraspinatus muscle is commonly known as the brisket.
Contrary to popular belief is not the same thing as the deckle brisket. Rather, it is fat and muscles that attach the brisket flat to the ribs.
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The apartment is just that: a flat, rectangular piece of meat that forms the majority of the entire brisket. This is the part that is cut across the grain and serve on a platter or in a sandwich. You've probably seen the apartment in case meat at the supermarket, separated from point and with most fat removed, ready for the Braise in the oven.
It is a lump of meat which partially overlap one end of the apartment. It's pretty greasy on the surface and in the flesh. It also contains a lot of connective tissue between meat fibers. It can be sliced, but its loose texture after ...

Supply Chain Management

What is a supply chain?

Here is this book's explanation of the "supply chain":

"A supply chain consists of all stages, directly or indirectly, involved in satisfying a customer issue. Supply chain contains not only to manufacturers and suppliers, but also carriers, resellers, and customers themselves.
A supply chain is dynamic and involves the constant flow of information, production and resources between the different stages. Each step in the supply chain performs various processes and interact with other stages in the supply chain. "

A typical supply chain can mean a variety of different phases, such as:
• Customers
• Resellers
• Wholesalers/distributors
• Manufacturers
• Component/raw material suppliers.

Some supply chain has all the stages but some have less, according to the company's environment. Each step could be a market or a hierarchy (Please reference materials in first class). In the Internet supply chain management, the designer must analyze the environment identifies the stages and types.

The purpose of a supply chain

In a supply chain generates every step a value. And the purpose of each supply chain is to maximize the total value generated. The value of a supply chain generates is the difference between what the final product is worth to the customer supply chain and the effort put in to fill the customer's request.

Supply chain profitability is the total profit is shared across all supply chain stages not only the maximum profit. We have to look at the entire chain's profits. The higher the supply chain profitability, the more successful the supply chain.

I stress this once again, "Supply chain management is about the management of flows between and among stages in a supply chain to maximize overall profitability".

Decision phases in a supply chain

A supply chain requires three phases of building. These phases are strategy or design phase, planning ...

Fin204

FIN204
Investment analysis for & decision-making
Assignment 02
Tran Van Trung Hieu
Batch 9
E1000125

Grade
(Only the use of office)
TASKS FOLDER

SUBJECT CODE: FIN204

STUDENT No.: E1000125

Date received
(Only the use of office)

STUDENT NAME: TRAN VAN TRUNG HIEU

PROGRAM: year 2, semester 2

INTAKE:

Subject name: Investment Analysis & decision-making |
Mission number: 2 |
Due date of assignment: 15 April 2013 date of submission: 3 June 2013 |

DECLARATION: I declare that

* No part of this mission has been copied from someone else's work except where due acknowledgment is made in the text, and
* No part of this mission has been written for me by any other person except where such cooperation have been approved by the lecturer concerned.

Signature ... date ...

N.B.
* Moderator has and may exercise the right to not select the assignment if the above explanation has not been signed.
* If the above explanation turns out to be false, no land to be assigned for this task.
Question 1:
Maplewood creations is considering to buy a new truck to replace an old truck which has a book value of $ 2,500 and $ 800 market value. The annual depreciation costs on the old truck was $ 500. The new truck, which will cost $ 29,000, will reduce operating costs $ 9000 per year over its 6-year economic life. The truck has a 5-year MACRS life and an estimated residual value at the end of 6 years of $ 2,000. About Maplewood has a 40% marginal tax rate and a hurdle rate of 12%, what is the NPV of the truck?   Use the depreciation schedule listed below:
(5-year depreciation schedule: 20%, 32%, 19%, 12%, 12%, 5%)
Answer:
Year | 0 | 1 | 2 | 3 | 4 | 5 | 6 |...

Aids research paper

The search for a cure
The worldwide phenomenon that has affected the lives of millions of people is called AIDS. AIDS stands for acquired immunodeficiency syndrome and it is a condition in which a person's immune system is too weak to fight off diseases and infections (AIDS. 1). AIDS was first discovered in the year 1981, and since then more than 25 million lives have been taken (AIDS. 2). Even if the amount is a significant number of deaths, has the quest to cure the AIDS EPIDEMIC become accessible through the years.

I. Prevention of AIDS
There are several possible ways for a person to be diagnosed with acquired immunodeficiency syndrome. One of these ways is through perinatal or vertical transmission (1 vendors). This transfer relates to the mother passing down the infection through childbirth, breastfeeding, or simply during pregnancy (2 providers). For pregnant women who are HIV-positive, it is important that they receive antiretroviral drug therapy, which helps to reduce the transmission of AIDS to their baby (1 vendors). In recent studies, after pregnant women took the initiative and took part in the therapy, reduced the proportion of overall perinatal transmission to only 2% (1 vendors).
Another possibility to get infected is through unprotected sex. This year the condoms have been available to protect themselves from sexually transmitted diseases, one of these

STDS to HIV/AIDS. In the United States, about 53% of new infections from sexual contact (AIDS research ... 1.) Because it is expected that not everyone can or will be using protection during intercourse, microbicides were developed to reduce the transmission of sexual diseases (AIDS research ... 2). Microbicides could be applied to those areas that can become infected during intercourse, and they have the ability to eliminate HIV on contact, and to protect cells that may be more vulnerable than others (AIDS research ... 2).
Many other types ...

Essays

Hypothesis.

In this section, our central hypothesis takes attention. The hypothesis will be made to bring the information together so that the scientist to make a preliminary statement on how the variables in the study may be related. Another purpose of this hypothesis is to provide a framework for reporting results and conclusions of the study.
For these reasons was made the next hypothesis that give the researcher a direction of investigation and go directly to the especial points which it considered relevant.
The first hypothesis put "students who have not as native teachers are affected more than students who have teachers as mother tongue in second language acquisition"
This hypothesis pretend to explain that if a student studying French in English, this process will be affected in a negative way just because of the absence of native teachers.
The second hypothesis could be "A greater presence of native teachers, bigger and better results will be in the second language acquisition"
This hypothesis is a hypothesis that the two present correlational variables. One of the dependent variable and the other an independent. Set the hypothesis that one variable increases, the other also.
The third hypothesis, that "those students who have more contact with native teachers have a better accent and a better fluidity than the students who have less contact with native teachers"
Means when a student has a real encounter with a native teacher, he or she can develop better communication skills and also can improve their pronunciation in either French or English accent.
That last hypothesis may be mentioned "With native speaker teachers in language Department can provide more benefits than disadvantages to the students studying modern languages major"
The last thing it shows that this gives more ...