Invention and Impact of the Three Phase Motor

Invention and Impact of the Three Phase Motor Introduction The main purpose of this essay is to convey a realisation to the reader of how the induction motor sped up the wheels of progress and sparked the second industrial revolution by effectively improving the efficiency of electrical power generation, creating the possibility of long distance electrical distribution. One third of the worlds electricity consumption is used for running induction motors driving pumps, fans, compressors, elevators and machinery of various types. (Lawson, 2005) The light that is illuminating the room you are in while reading this most likely powered by a generator influenced by Nikola Teslas design of the three phase induction motor. Any mechanical gadget or machine such as a washing machine, vacuum cleaner or toothbrush, are all powered using a three phase rotating magnetic force based on Teslas basic principle. Nikola Tesla was a 19th century inventor which thought up the idea for the use of a rotating magnetic field in 1882 and finally invented the induction motor in 1887 and got it patented by 1888.ÂÂ   Development of the three-phase induction motor began in 1891 by a company named The General Electric Company, who Tesla sold his patent to, and achieved its first practical induction motor in 1892. A year after this the GE company developed a line of polyphaser 60Hz induction motors for mass commercial sale. Once in the 21th century, power generation is widely demanded and supplied throughout the globe. The price of power has hugely reduced in the past 100 years as it is so easy to generate it with this simple design. As it been around for a century now it is familiar to people in the electrical industry and has fewer parts as opposed to other motors making it an easy installation. Impact of the Induction Motor at Time of its Invention When the first induction motor was invented and introduced to the public, there was what was called a War of the Currents which was birthed from the objective of electrical power transmission across the country and illuminating the nation. In 1878 inventor Thomas Edison noticed a market for bringing electric light directly into a persons home or business. These direct current systems would be sold to cities across America. Edison essentially controlled all technical development and from that made it a standard for lighting. Direct current (DC) worked well with Edisons incandescent lamps, which were the main supplying loads of the system. DC could be stored in batteries, so generator power could be backed up and run smoothly even if there was a power cuts. Edison also invented a meter so customers could be charge for their energy consumption, but the meter would only work with his DC system. The main disadvantage of a DC system is that it ran on 110 volts starting from its generation right until it reaches its destination. This meant that it would have a very short transmission range as the DC current could not be transformed to lower or higher voltages, losing its efficiency the longer the length. To reduce the cost of thicker copper cables for generating and transmitting higher voltages, generating plants had to be placed in between busy cities and could only supply a home or a business less than a mile away. Tesla thought he had the solution to the Edison problems with his use of alternating current (AC) power. Generated using his induction motor, AC current alternates the direction of current a certain number of times a second (which is called the frequency of the current, measured in hertz Hz) which could easily change voltages with the use of a transformer. High voltage meant the current could travel great distances with minimal losses, then be stepped down to a lower manageable voltage at the consumer. Around this time another American inventor and entrepreneur George Westinghouse, who began in the electric lighting business using a DC system, soon became aware of the new European transformer based AC systems. He understood that using this system would be possible for a greater economy of scale as a transformer could supply a high voltage to applications that needed that type of voltage such as arc lighting. Any other applications which required a lower voltage could be achieved as well. Westinghouse recognised that this system could easily compete with Edisons DC system which was in place at the time. Impact of the Induction Motor in Modern Times Tesla explained that these three alternating currents would have toi ve out of phase with each other by 120 degrees in order to create rotating magnetic field, but there is nothing to indicate that he understood in 1882 the signifigannce of having the currents out of phase. My idea Tesla explained, was that the more wires I used the more perfect would be the action of the motor. References Communications, W., 2016. MPowerUK. [Online] Available at: http://www.mpoweruk.com/[Accessed 29 02 2017]. Feldman, B., 2014. Quora. [Online] Available at: https://www.quora.com/How-energy-efficient-are-electric-motors-compared-to-combustion-engines[Accessed 29 02 2017]. Puiu, T., 2016. ZME Science. [Online] Available at: http://www.zmescience.com/science/history-science/history-induction-motor/[Accessed 29 02 2017].

Child developmental summary

There are five sub categories when looking at a child's development and although all of these are age guided, not all children reach the same area at the same time, neither do they systematically achieve each stage by a certain age, although they are achieved in order, they are there for guidance purposes only. The five Identified areas that a child develops are physical, Intellectual, social, emotional and language The first stage which has been termed by cognitive psychologist Jean Planet as the Seniority stage covers the age range from birth to 2 years of age.This Is the age range when the most dramatic and primary changes happen, with the baby transitioning from being totally dependent upon a career for all sources of their welfare and development, to exercising a very limited way of communicating to others their wants as they develop into becoming a fairly able bodied toddler who can more often than to exercise their autonomy through vocal and physical displays of preference.Dur ing the seniority stage a child learns about the world around them through the 5 senses, touch, taste, sight, sound and smell. It is through the use of these senses that the baby begins to interact with their environment, initially it is smell and sound which Is used to Identify their primary care giver normally this recognition Is In the form of bodily smells and voice.Their sight Is the next sense, developing from a black and white Image with color slowly Integrated, It Is through this process here they begin to socially develop relationships by recognition of people within their environment, especially with a great response towards the human face , this is then built upon by the fine tuning of voluntary and reciprocal expressions of both facial expressions and noises, that eventually turn smiles or cries into fully formed words, making social exchanges a two way social interaction where by autonomy is expressed.Through the use of taste and touch babies assist their exploration of their environment through the use of their mouths and tongue, this is soon over mom and exploration is then mostly practiced via the touch alone, so they grow the next area to develop Is to define their fine motor skills, beginning with holding a finger of a care giver, to a rattle, to aim for grabbing distant objects, using the pincher grip when learning to self feed, to finally having the ability to grasp objects and use them with Intentional purpose, like bang a drum or push a toy car along.These fine motor skills are not just confined to upper limb movement but also the ability to aided/ unaided to crawling to walking to running to Jumping and even attempting to inferno stairs. But social interactions within their environments are Just as important to a child's development at this very early stage as they are even later on, due to them battling internal conflicts and their abilities to grasp concepts from the world around them, therefore positive reinforcement and interactions are necessary to encourage social development.Overall by the end of the seniority stage children have developed from being totally dependent to being more environmentally and socially aware of their surroundings. The next developmental tag of a child can be classed as pre- school or as Erik Erickson termed it, the play age, with the age band of 3-5 years. Neurological connections continue to be produced at a high volume due to the need for the increase in cognitive abilities.Through this stage children become more self aware of themselves along with that of others developing a sense of individuality within their environments and are able to control and express their emotions at a more direct level whilst also being able to express empathy towards others. Their physical capabilities are becoming finer need with the ability of being able to catch a ball, move to rhythm, and hold a pencil and balance. Intellectually they are becoming more inquisitive therefore are able enquire and to a bsorb information rapidly allowing them relay it at most times a comprehensible level.Their play also begins to incorporate details of everyday life and aspects of role play begin to show. Level Weights deems this stage of proximal development important to not only the child but also the people/ peers within the child's environment as they are there as guide to help steer and influence the child's hinging acting as a ‘scaffolding in development' through encouragement of exploration. The next developmental milestone stage in child development that follows on from the ‘play age' is the age range of 5-8 years.During this stage of the child's development their development becomes more sophisticated by putting into practice all they have learnt since birth by fine tuning their speech and every movement, along with their intellectual awareness being much greater with them becoming more inquisitive about the world, their environment, who they are as a person and here they fit i nto this world due to becoming more aware of differences in all aspects of their lives.They are also at a stage where they begin to feel the need to ‘belong and fit in' with a greater personal emphasis being placed upon relationships. They are also more aware of others feelings towards themselves, making this a very vulnerable stage with personal perceptions and peer group opinions being a very important factor in this stage of development proving complimentary of Level Hoosegows theory that this stage is reliant upon the ‘scaffolding of peer relationships'.

Eths Week Diversity

You may need additional resources from the University Library to complete this aactivity. Write a 750 to 1,050- word paper answering the following questions: The status of women in the United States tthroughout history one of the first things that you will see was that women had much fewer rights and they were not accepted in job places as the men were. Women were known as the mother of children who stayed home and also being the house wife that took care of all the household needs such as cleaning, cooking, and taking care of all the bills and finances that the husband brought home from long days of work.Women always made sure that everything was in place and token care of. Men were thought of as the superior ones and the women were less of them, they were not able to work in the same positions as the men in work places, or have card night with a few drinks with their friends. The women’s role was to take care of all the chores within the home such as the laundry,ironing,clea ning of the home including dusting, taking care of the children and the mearns responsibility was all the labor chores of the outside such as the yard faintness, plowing the snow, they would be the ones to go hunt and fish.Many things have changed from the history of women that is present in the U. S. today once the 20th contrary came around women were given the right to vote as well as the right to be treated equally to men in the work environment. The women today have all the rights as everyone else of the opposite sex and have learned how to be dependent on them now instead of on their spouse. The wages for women are not any less of the men and are able to receive positions anywhere as a man would be in.You see women in politics trying to stand up for what could be good for our nations and is allowed to voice their own opinions on issues and problems that we are facing within our nation. You also now see women being police officers, firefighters and other law enforcement jobs. So me examples of concepts or constructions of masculinity and feminine that we see in the society and in the media are everywhere in today’s life. I will start when it all starts and this is in children. We know that pink is for girls and blue is for boys.The girls toys are dolls, play make up and princess outfits while the boys toys are cars and trucks, guns, super heroes figuring’s and outfits. The teenage life we see the girls are about makeup, their hair styles, brawls, and making sure that they have the top of the line outfits that looks just right. The boy’s are into sports, and cars, and what cologne will make the girls want them. As adults we see how the mother is taking care of the children and what will help them with this and we see that for men it is about vehicle, sports, and sex appeal.Following its passage by the United States Congress. (www. gsaday. org) Some of the social and political issues relevant to women and GLBT people in the U. S. are the respect that they get from others and the dincriminating ways others put on them just because they are women or apart of the GLBT community. I feel that there are many people that are out in this world that will live their lives just to make the lives of women and GLBT people harder for no reason other than to make them feel better.We are finally seeing both in politics and earning their respect that is needed but it is still harder for them to get where they are just because of what they are. I feel that one day will be better than what it is today and it is up to all of us to find the ways to get us all there are do it. It a big team job but it is possible to see the stereotyping, discrimination, and racism become little to nothing in our Nation. This is why I will have faith forever to see a change soon.

Exploring Teaching Methods that Help Engage Students Essay

Considering a stereotypical class room, the bell rings, students are almost in their seats, and the teacher is demanding their attention. It is hard for the teacher to gain the attention let alone the willingness to learn from their students. No matter what subject is being taught, this has the recipe for boredom from the get go. Any curiosity or imagination for the students has been choked. In order for the teacher to gain the eagerness to learn from his students, he would have to resort to all the mental keenness he could muster. No matter how gifted the teacher, students tend to lose interest in learning in an everyday run of the mill style of class room environment. What creative power or what unusual and highly innovated resource†¦show more content†¦Without certain tactics, students are doomed to the same lecture style of education. In this style the teacher is the possessor of knowledge. The teacher lectures and the class takes notes. The teacher then models a nd the class participates in guided practice. The teacher gives homework and the students do independent study. There is no connection of life and lesson plan in this style. Not all quiet classrooms are learning classrooms. The teacher in this situation may think of himself as the key to unlocking the mysteries of universe and all student better take heed to his knowledge. In other words, be quiet and just listen. There are many different learning styles, and this only promotes one – auditory. This is not to say that this method of teaching is not appropriate, but it should be used in moderation. A more effective method would be a discussion method (Henning). This could be implemented in a many different ways, including discussions spun off of short mini-lectures, group lead discussions, teacher lead discussions, and discussion provoked by audio visuals as described above. 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