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What the advantage of compensating winding for direct-current generators?
compensating winding is the one which is connected in series with armature winding & current flows in reverse direction to that of in armature .therefore the flux produced by this winding is such that to compensate armature reaction(effect of armature flux on main flux).hence voltage drop due to armature reaction reduces so terminal voltage of dc generator increases
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A 'compund wound' dc generator has shunt winding and a series winding. The shunt winding has a high resistance, and draws only a small current from the armature, but as it has… many turns of wire on it, it generates a strong magnetic field. The series winding has only a few turns of wire on it, and, even though it has a large current in it, its magnetic field is usually less than that of the shunt field. Because of this, the compound generator behaves in most ways like a shunt generator, and is controlled in the same way. As it is self-excited, the compound wound generator requires 'residual flux' to start the generating process. The series winding, if connected to AID the shunt field, can boost the field flux as load comes onto the machine and correct for the normal 'droop' in output voltage as the load increases. If set up properly, this correction makes the generator self-regulating. Because the fields aid each-other, this connection is called 'cumulative compounded'. This type of machine is the workhorse of the larger generator market. If the series field winding is connected so it's field OPPOSES the shunt field, then the output voltage of the generator collapses as the machine is loaded up. This connection is referred to as 'differential compounded', and is only used for arc welding generators - they have a high voltage before the arc is struck; a fairly low voltage during welding operations, and if the rod sticks to the work, they shut the generator down without damaging it.
What are the advantages of generating electricity by wind turbines compared with generating it at an oil-fired power station?
wind turbines have blades like the propellors on the first aeroplanes wind turbines with blades convert 20-30% of wind energy into electricity but this new turbine can convert… 70%.
Here are a few of the advantages: 1. We can generate cleaner energy to keep the earth clean. 2.We can generate energy more efficiently. 3.We can …preserve our fossil fuels because they take millions of years for the Earth to make. Actually, none of those really occur and there is also millions of dead birds and bats. Wind systems are based on 28 mph average speed. If the wind goes over this, they shut down, under and power is cubically reduced. At 14 mph, wind gives us 10% and at 11 mph and it shuts down again. As a result fossil fuel plants run at 100% of rated to compensate for wind variables. The expected life of a wind system is shorter then the payback time. That means they actually are expected to cost us energy. They produce less energy then the energy it takes to build one! Hardly a good thing, but they feel so good.
It generally blows at the eastern part of the United States.
They will first allow the banker to balance its books. The bank is said to be in "balance". It will also allow for proper reconcilliation of related, offsettng accounts. A hyp…otication is levveraged debt by pledging a note and bank asset as collateral for a loan. For example, a $1,000 CD can stand as the assurance for a $1,000 loan. Bank regulators are less concered with the credit of the borrower for an obligation secured by compensating balances which is a compensating collateral account or certificate of deposit.
- a wind turbine - The propellers or blades around a rotor turn when the wind blows against them, producing energy. This energy passes from the rotor to the main shaft, …then spins the generator to create electricity. A tower approximately 100 feet in height holds the wind turbines to capture most energy coming from the wind. Wind turbines can produce electricity for a single building or home as well as distribute electricity through power grids
The wind is generated from the air going from high temperature to a low temperature.
i want to know about the advantage and disadvantages
Why are the compensating winding and the interpole winding used in a universal motor for AC operation?
compensating winding is used for equal load sharing of two generators running in parallel. while interpole winding is used to minimise the effect of armature reaction by suppo…rting the main field.
for neutralising "CROSS MAGNETISING EFFECT"
simply when there is wind it stors up some electrisate and releses it very slowly it genrarets power for its self it even use it when there is wind becase it would go around r…ely slowly Wind generators only produce power when there is enough wind to turn the generator. For small scale units (private, home use) you need enough battery storage to carry you through times of no wind. For commercial generators, they are placed in locations where the patterns of wind are known to be steady and nearly continuous. When there is no wind...the windmill when there is wind stores up energy inside itself so that on a day when there is no wind, you have energy! :)
Inexhaustible fuel sourceNo pollutionOften an excellent supplement to other renewable sources It will never run out.
What are some of the advantages and disadvantages of using the wind as a source for generating electricity?
Advantages Like hydroelectric power - wind power uses the energy of nature and is what is called free energy. It is also clean in that it doesn't have pollution as a …waste product. Disadvantages Initial cost of wind turbines is a major investment, as is maintenance, but those cost are coming down. Is dependent on the vagaries of the weather. Either no wind or too much makes energy collection difficult, There is also a possible detriment in that as wind farms become more numerous that the weather patterns of a region may be affected by the slowing of the natural winds (something that cannot be avoided since windmills are powered by the wind which is slowed as a result). I know of no studies that would say that this is a good or a bad side effect. Other disadvantages would include the fact that fossil fuel plants remain running at almost full capacity to offset the wind variations. Thus no reduction in fossil fuel use or CO2 reduction. Millions of birds and bats are killed each year with existing systems. As the numbers increase, so will these fatalities. Wind systems rarely produce enough power to generate another wind system. Thus even if the fossil fuel plants were not running, wind itself produces less power then they take to build. Thus, they do not even qualify as green. They do allow a feel good to the whole idea, even though the overall is a negative affect on the planet.
to neutralise the cross magnetising effect of armature reaction
What are the advantages and disadvantages of commission only compensation versus salary only compensation?
Good question, but really it is based upon what is good for you. With commission only, you are in a position where you are in charge of your income. If you are good in sales, …focused, a self-starter and willing to work hard - you will more than likely have better than fair commission checks. The drawback to commission is the fact that you can get chargebacks. If someone fails to follow through with their end of the contract, stops making payments or what-have-you; as a person who's pay is based on commission only, you MUST UNDERSTAND that charge backs are real! Also, consider the fact that YOU are responsible for paying in your own taxes! Being compensated by salary gives you the comfort of knowing how much money you are to receive on designated pay periods. The downside is that you have to wait for raises and you are not in control of how much you get paid. Thus, resulting in many people who get frustrated over time with raises less than 2%! Really there are pros and cons to both, but it is best to assess your personal finances and your goals to determine which form of compensation is best for you.
Under what conditions is it advantageous to generate alternating current in preference to direct current?
You can step up or step down an AC voltage -- power transmission without excessive energy loss. You can store AC energy in a passive element, requiring no batteries. AC signal… can propagate in air/space (wireless communication). You can moderate AC signals (FM, AM). You can store a lot of information in AC signals.