Alternating current (AC) motor basics 

electric motor with wires

The alternating current (AC) electric motor has become an indispensable part of today’s life. These devices come in different varieties, but they fall into two categories; induction and synchronous machines. The name machine emphasizes the fact that as motors can operate in two distinct modes. Electrical power makes the produce device rotation which makes it a motor but when the same machine receives rotational energy, the device becomes a generator, and it provides energy.

How does an AC motor work? 
Unlike flashlights and toys, most offices, factories, homes among other buildings are not powered by batteries that are direct current. Instead, they are equipped with AC, which reverses its direction almost 50 times per second at a frequency of 50Hz. In case you want to replace a DC battery with an alternating current electricity supply, you need a different motor design.

An AC motor has a ring of electromagnetics which are arranged on the outside making up a stator that is intended to produce a rotating magnetic field. Inside the stator resides a loop of wire, a coil, a solid metal axle, a squirrel cage that is made of metal bars and interconnections similar to those of the rotating cages that people use to amuse pet mice or a freely rotating metal that can conduct electricity.

Unlike a direct current motor where power is sent to the inner rotor, an alternating current sends power to the outer coils used to make up the stator. The coils are sequentially energized in pairs, and they produce a magnetic field that rotates outside the motor.

How the rotating field makes the motor move

The rotor which is suspended inside a magnetic field is an electrical conductor. Since the magnetic field is rotating, it always changes and according to the laws of electromagnetism, the magnetic field induces or produces an electric current inside the rotor. If the conductor is a wire or a ring, current flows around it in a loop, but if the conductor is a solid piece, the eddy current flows around it instead.

Whichever way, the induced current produces its magnetic field and according to the Lenz law of electromagnetism, the induced current flows in a direction such that it opposes the change that produced it.

Electromagnetic induction is the reason why AC motors spin and also explains why it is called an induction motor.

The main advantage of AC motors is their simplicity. They only have a single moving part, the rotor which makes the quiet, low cost, durable and trouble free. In contrast to DC motors that have carbon brushes and the commutator that may wear out and require replacing with time. The friction between the commutator and brushes makes DC motors noisy and sometimes smelly.


Since the speed of an AC motor depends on the alternating current’s frequency driving it, it turns at the same speed unless a variable frequency drive is used. On the other hand, the speed of a DC motor is easier to control by only turning the supply voltage either up or down.

AC motors are also bulky because of the coil windings, and they cannot be driven from their source without an inverter because they need a changing magnetic field to turn the rotor.

Though there are countless of Ac Motors today, their principle of operation remains the same to all models.

Useful And Time Tested DIY Bathroom Plumbing Ideas


There is no doubt that our bathroom is an important room in our entire home. We would like to look good and in the best of the condition. It should also be clean and free from impurities and possible sources of infection. When we talk about a bathroom, there are a few fixtures and fittings that come to our mind. These include a sink, toilet, tub, flooring, shower, and perhaps even a wardrobe to keep things which we require. While hiring a Plumbing Professional is perhaps the common way in which we set up these fixtures and fittings, in this article we will try and find out some DIY bathroom plumbing ideas which probably will help you save money and also assist you in having your way when it comes to designing the bathroom. However, doing it on your own is not an easy job, and quite a few things must be understood, especially concerning techniques and plumbing systems. It is also important to come out with a foolproof plan, and perhaps you also would need to take the help of a professional helper to get the job done right.

Start With Getting A Fix On Plumbing

When you are planning to set up a sink, commode or a wash basin, you cannot just start off one beautiful morning. You will have under that each fixture and fittings that you are planning, have their one uniqueness and variations which must be taken into account. You could have pipes running in a different direction, and the circumference and sizes of pipes which you will be using will also be different for different fixtures and fittings. Hence, without the necessary skills and techniques being in place, it might not be advisable for you to get started with the do it yourself bathroom plumbing. There are quite a few resource materials available on the internet, and there are also some reliable and easy to understand user manuals which can help in your DIY endeavors in more ways than one. You must certainly pay particular attention to the vents which will be connected to the pipes emanating from the commodes, bathtubs, wash basins and other such fixtures and fittings. You must have a foolproof and error free blueprint. Only then should you get started with the process. There are some specific codes as far as these pipes and vents are concerned, and you must adhere to the same so that your DIY plan works out well.

Mere Plumbing Skills May Not Be Enough

Apart from plumbing skills, if you want to do a great job of your bathroom fixtures and fittings, you must also have a reasonably good idea about carpentry. This is because modifying and framing the entire structure using carpentry works makes the job of plumbing that much simpler and easier. Further, when doing plumbing in the bathroom, you must do it in such a way that it does not damage studs and joist in any manner whatsoever. However, some bit of damage is unavoidable, but it must be kept to the essential minimum.

The Sailing May Always Not Be Smooth

However, it should be kept in mind that there could be occasions when the whole things could go awfully wrong especially if the blueprint is not proper. Having a master plan is excellent but understanding it and implementing it on the ground is something which requires a lot of knowledge and of course some skill set. There could be situations where after completion of the plumbing job one could come across a leak. Identifying the source of the leak when the entire job has been completed could be a tough task.

Always Have A Backup Plan Ready

Going in for plumbing on your while a good idea must not be taken lightly or should not be taken for granted. You must be smart enough to have a plan B in place failing which it would not be possible to complete the project. Having a half-completed bathroom where the plumbing work has gone awry or messed up is the last thing you would want. You must, therefore, tread with caution. A better option perhaps would be to take up one job at a time and then move to the next one. This will help you to bite exactly what you can chew and avoid going overboard.

Home owners doing plumbing themselves

All About The Semantic Web


The semantic web is the addition to the internet into form and format that helps machines better organize and represent information. It’s based on human assumptions and learns as it grows.

When the internet first became public, it wasn’t very organized. Information relationships were varied and arbitrary.

It’s all about relationships

The semantic web brings a relational structure to information and people. It’s very similar to a relational database. A relational database allows multiple pieces of seemingly different data to be combined into related records. Once the relationships are established, the software, or machine, does the rest.

Links on the web are made with anchor text with an anchor tag. These tags point to different files and locations on the same or different websites. The anchor text, the text you click on in the link, is what establishes the relationship.

Thinking in relationships

You’ll help yourself in your search engine optimization efforts by thinking in relationships. If you want someone to link to your site, you don’t want them to use “click here” or “this site” or some other type of generic text as the anchor text. This is because it’s not establishing a particular relationship. It’s simply a way to add a better user experience. But, what may help a user won’t help you improve your search engine rankings.

When you place a link, ask yourself, What’s going to serve humans and machines at the same time. You want to make sure the search engines, the machines, are finding and establishing the relationships that will ultimately lead to better semantic search engine rankings.

If you can train yourself to think regarding the relationships you’re creating with your links, you’ll come away with a better understanding of how search engines choose to rank websites for specific keyword terms.

Copywriting Tips for Correct Semantic Web Markup

Given the popularity of blogs, and the importance of blogs in creating inbound links to your business website, you’d think that they’d already be equipped with perfect semantic web markup. But you’d be wrong. Of course, these errors aren’t going to make or break your business, but you’ll be ahead of the game if you’ll address some of the problems yourself. Here are five areas that you’ll want to address as you’re correcting the semantic web markup on your blog:

Page Titles

There’s no way to get around the importance of a page title as it relates to search engine rankings. Search engines take the contents of your title tag and put those materials in the search results that they display. Some blog platforms do a good job of handling page titles such that the page titles are displayed optimally within search engine results pages. But many times the platforms preface the page title with the name of the blog, which may or may not have any significance for an internet user, particularly if the name of your blog has little or nothing to do with the title of the page that your user is looking for.

Another reason to pay attention to page titles is that search engines don’t read content, they scan it. So your page titles should be as relevant to the subject contained on the web page as possible.

Logos and Taglines

Many blog platforms contain site logos within an h1 tag, which may not appear to be problematic at the outset. The problem, however, is that the h1 tag, aside from your title tag, should provide the most valuable information about your web page to both searchers and search engines. Instead, you should be using the h1 tag to give search engines and human searchers the most relevant information you can about the contents of your web page. To fix the problem, try putting your blog title inside a div tag.

Put your tagline within that tag on your homepage. Make your tagline accurate and compelling so that searcher will know exactly what they can expect from your web page. Put in within h2 and h3 tags in your secondary web pages. It should never appear to be more important than the title of the page or the title of the post.

Post Titles

Your post title is the most important information you can provide to a search engine, so make sure it’s not hiding within an h2 tag. Instead, put it inside an h1 tag so that searchers and search engines will know exactly what they will find on a particular page. There should only be one set of h1 tags on each of your pages, so take advantage of them and use them wisely.


SEO experts and internet marketing professionals emphasize the importance of relevant, well-laid-out content in the quest for increased search engine rankings. And one of the best ways to lay out content within a blog is to use sub-sections to break up the material into easy-to-digest pieces. Since the title of your post should be in an h1 tag, then it certainly makes sense to put sub-headings within h2 tags, but if they’re currently in h3 tags, then it’s probably too much trouble to change them now.

Sidebar Headlines

Several blog platforms put sidebar headlines within h2 tags. The problem with this is that most sidebar headlines don’t have much relevance to your actual page content, so you’re wasting a valuable h2 tag on something that won’t make much difference. The most value you should give them is an h3 or h4 tag. In the case that your sidebar headlines are quite relevant, you may want to put them in h3 tags; otherwise, h4 tags are most appropriate.

Article Provided by Urban Optimization

Holding the internet in the palm of your hands

Understanding Real Estate In Charleston Sc

Real Estate

 If you would like to understand what Real Estate Management is all regarding, you need to know 1st what the term Real Estate means. This term is used to denote any piece of land and any additions that are made to that area. Additions to the property can be something sort of a building, a compound wall, fencing, and the similar kind of stuff. Even a well that’s located on that piece of land is taken into account to be an addition to that property. And since these additions aren’t movable, they belong to the same person who owns the land on which they are located. The common man prefers to refer to any or all this as his property or Real Property.

Reasons why anybody would need to hire a Real Estate Management Professional in Charleston sc

If you were the owner of a large piece of residential property, you might not be ready to allow a lot of time interacting with tenants. Collecting rent due to you and answering phone calls for repair and maintenance or liaise with a security agency to provide security services will be severely time-consuming and may leave you with small time for something else.

This is when you will need the services of a Professional Real Estate Management company. They can liaise with your tenants on your behalf and collect the rent that is due to you. They will additionally reply to their calls if there’s a need for any repair and maintenance and respond to their other needs as matters arise. After all, it can all be done as per the agreement you have with this company, and that they will only be following your instructions. This type of relationship will leave you with enough time to focus your attention on other matters.

Real Estate Management professionals conjointly come in handy when you would like to purchase or sell a property. An agent will negotiate on your behalf with the customer or seller and take care of all the verification and documentation procedures. After all, you’ll have to pay them a certain percentage of transaction amount as their commission, but if you study it, it would be nothing compared to the hassle they would be saving you. You’ll also hire one of those professionals to manage your industrial or commercial property on your behalf. They can make sure that there is maximum occupancy and can conjointly be accountable to gather all the money that is due for you.

A real estate purchase agreement is a legal written understanding between a real estate seller and buyer. This contract outlines all the sale terms that were agreed upon by both parties. Naturally, the buyer would pay more attention in getting the deed while the seller will focus on getting the cash from the sale. However, many significant concerns have to be strictly dealt with before closing the deal. In this case, a well-drafted purchase agreement would help prevent misunderstandings related to the sale since it will identify all the pertinent terms and present the complete picture of the deal. This explains why getting familiar with the real estate purchase agreement is necessary for every interested home buyer even before he start looking into different homes for sale.

To better understand what the purchase agreement is all about, it would be ideal to start off learning about what should be written and the procedures essential to come up with a clear and legal real estate purchase agreement.

Basic Sale Terms

In the purchase agreement for real estate, you will find the necessary deal terms. In this portion, you will locate the purchase price and the earnest money. The earnest money is the cash deposit required for the intention of securing the buyer’s commitment. It also includes the date and the procedure when the customer will receive the property title. This is also known as the closing part of the sale. Once the purchaser and the seller meet all the conditions required to close the purchase agreement, the escrow agent will proceed to document the deed and move on with the dispersal of sale proceeds to the seller.

The Role of An Escrow Agent

The sale of the real estate property starts when both parties sign the purchase agreement; to be followed by opening an escrow with a licensed escrow agent. The name of the agency as well as the escrow instructions will be included in the purchase agreement. It is the duty of the escrow agent to act as custodian of the documents and the funds as agreed upon by both parties.

About Contingencies

There are cases when a buyer would consider terminating the agreement and getting the deposit back once he is not happy with the conditions agreed upon. This is why a contingency for any concern of the buyer should be included in the real estate purchase agreement. For example, a period inspection emergency will give the customer the freedom to cancel the contract and retrieve the deposit once problems are detected during inspection.

In most cases, the flat fee real estate agent is the one responsible for preparing the actual estate purchase agreement. There are also some standard forms of this kind that you can find online and pre-printed forms available in most states. Conversely, there are also buyers and sellers who prefer to have this document prepared by a real estate lawyer. But, regardless who among the qualified real estate professionals develop the actual estate purchase agreement; the most important thing of all is to make sure that all details and inclusions, as well as contingencies, will work best and fair for both the buyer and the seller.