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Topic: Power transfer

	Power transfer (Site not responding. Last check: 2007-11-03)
		A power transfer or energy transfer is the process of passing working energy from one system or device to another.
		Such transfers can be between energy types, as from electricity to mechanical motion, or within a type, from one mechanical motion to another.
		Emergency Transfer Switch Manual transfer switches built to Canadian standards allow the home owner to switch from the utility power to a back-up generator during a power outage.
	www.serebella.com /encyclopedia/article-Power_transfer.html (440 words)

	Power transfer and efficiency
		Maximum power is transferred from the source to the load when the resistance of the load is equal to the internal resistance of the source.
		The efficiency of power transfer (ratio of output power to input power) from the source to the load increases as the load resistance is increased.
		The efficiency of power transfer is only 50 percent at the maximum power transfer point (when the load resistance equals the internal resistance of the source).
	www.tpub.com /neets/book1/chapter3/1-22.htm (476 words)

	Maximum Power Transfer Theorem - Microwave Encyclopedia - Microwaves101.com
		The importance of matching a load to a source for maximum power transfer is extremely important in microwaves, as well as all manner of lower frequency stuff such as stereo sound systems, electrical generating plants, solar cells and hybrid electric cars.
		Then you ask, "why doesn't maximum power transfer happen when I put a short circuit on the output, I know that the battery will discharge quickly under that condition?" The problem here is that total dissipation will be maximum with a short circuit load, but no power will be transferred out of the battery.
		For amplifiers in or near compression power and efficiency are complex functions of many factors including the outermost excursions of the dynamic loadline near the pinch-off area and near the Imax boundary.
	www.microwaves101.com /encyclopedia/maxpower.cfm (824 words)

	Generac Power Systems - Automatic Transfer Switches (Site not responding. Last check: 2007-11-03)
		It also ensures that different power sources are fully synchronized before their power is combined or loads are transferred, which is imperative for safe operation.
		In about five to ten seconds, when the generator is producing full power, the transfer switch disconnects the load from the utility and connects it to the generator, restoring electricity to the load.
		The transfer switch continues to monitor utility power, and when it is restored, switches the load from the generator back to the utility.
	www.generac.com /industrial/products/auto_transfer.asp (551 words)

	Maximum Power Transfer Theorem - Chapter 10: DC NETWORK ANALYSIS - Volume I - DC (Site not responding. Last check: 2007-11-03)
		Simply stated, the maximum amount of power will be dissipated by a load resistance when that load resistance is equal to the Thevenin/Norton resistance of the network supplying the power.
		Impedance, the overall opposition to AC and DC current, is very similar to resistance, and must be equal between source and load for the greatest amount of power to be transferred to the load.
		The Maximum Power Transfer Theorem states that the maximum amount of power will be dissipated by a load resistance if it is equal to the Thevenin or Norton resistance of the network supplying power.
	www.allaboutcircuits.com /vol_1/chpt_10/11.html (474 words)

	Power Transmission (Site not responding. Last check: 2007-11-03)
		Power is generated by the newly established plant in Barisal.
		The main aim of this project is to transfer Power in Dhaka.
		But as always occurs in case of power transmission it is tough to resist loss.
	acm.uva.es /p/v103/10330.html (271 words)

	4.9:Maximum Power Transfer Theorem (Site not responding. Last check: 2007-11-03)
		(For example, transferring the maximum power from the stereo amplifier to the speakers, or from the antenna to the amplifier.) In words, it states that a load receives maximum power when its terminal resistance is equal to the Thevenin resistance of the source.
		Always keep in mind that the power that does not reach a load is lost across the Thevenin resistance (in the form of heat) and serves no useful purpose.
		It is only in the case when we are concerned with maximum efficiency that we need to employ the maximum power transfer theorem principles.
	campus.murraystate.edu /tsm/tsm118/Ch4/Ch4_9/Ch4_9.htm (251 words)

	Power transfer -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-03)
		A power transfer or ((physics) the capacity of a physical system to do work; the units of energy are joules or ergs) energy transfer is the process of passing working energy from one system or device to another.
		Such transfers can be between energy types, as from (A physical phenomenon associated with stationary or moving electrons and protons) electricity to mechanical motion, or within a type, from one mechanical motion to another.
		For instance, a (Fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period) coal-fired power plant involves these power transfers:
	www.absoluteastronomy.com /encyclopedia/p/po/power_transfer.htm (317 words)

	Camping World Open Roads Forum: Tech Issues: Onan Generator problem. Power transfer switch?
		The A/C switch is probably operating a relay similar to the transfer switch; and the second A/C may be switched directly to a second gen power feed when the gen is on.
		With limited information I am assuming that you have a 30 amp shore power plug and that is the reason for the front/rear switch for your AC units as 30 amp units are designed to only run one AC unit at a time.
		If you follow the power lines going from the generator toward the breaker box, you should find the transfer switch and also you should be able to hear it kick in as it typically makes a thumping noise when energized.
	campingworld.com /forums/index.cfm/fuseaction/thread/tid/12937262.cfm (756 words)

	RVUSA Forum - Power Transfer Switch
		Looking the compartment where my shore power cord is I have found two electrical boxes and a Lectra Surge Protector (it has a little red light that is on when there is power).
		Since you plug the cord in to get power from the genset, that is there instead of the transfer relay and power gets to the RV in exactly that same way wheter you are running on the genset or on shore power.
		Also, that means that if everything works when on shore power, it is then safe to assume that everyting from the power plug on is working as it should.
	www.rvusa.com /forum/main/topic.asp?topic_id=4484 (491 words)

	Guardall Safes and Locks (Site not responding. Last check: 2007-11-03)
		They offer a high degree of reliability and as they provide fully concealed power transfer, once installed, they considerably reduce the possibility of vandalism and interference with the circuit.
		It consists of two die-cast brass plate and a stainless steel spring through which the power transfer conductors pass.
		Care should be taken that there is sufficient space on the jam side, or within the door to allow for the power transfer wire to move freely.
	www.guardall.com.au /power_transfer_hinges.htm (237 words)

	Maximum Power Transfer (Site not responding. Last check: 2007-11-03)
		But when we want to find out how much power actually gets transferred to the load and how much is actually generated by the voltage source, we cannot rely on the Thévenin-equivalent circuit: we must revert to the original circuit.
		This is deceptive: one might suppose it is the power produced by the Thévenin-equivalent voltage source but this would be false.
		Use the Thévenin-equivalent model to determine the load resistance to maximize transfer of power from the source to the load.
	www.nadn.navy.mil /Users/ee/cameronc/Tutorials/MaximumPowerTransfer.htm (428 words)

	USATODAY.com - U.S., Britain hail Iraq power transfer (Site not responding. Last check: 2007-11-03)
		Bush administration officials expressed optimism that the early transfer of power would strengthen the new government's hand to deal with rampant violence and the threat of terrorism.
		The early transfer had been under discussion between Allawi and U.S. officials for at least a week, a senior administration official said, speaking on condition of anonymity because of the delicacy of the talks.
		Last Thursday, the U.S.-led coalition transferred the final 11 of the 26 government ministries to full Iraqi control, meaning Iraqis were already handling the day-to-day operations of the interim administration.
	www.usatoday.com /news/world/iraq/2004-06-28-bush-blair_x.htm (1015 words)

	Visteon Corporation: Power Transfer Unit
		Power transfer units are transmission driven gearboxes that provide the driving force to the secondary driving axles from the primary driveline.
		Power Transfer Units incorporate a 90-degree hypoid gear set that enables power to be directed towards the rear of the vehicle in vehicles with transverse-mounted engines — typically used in front wheel drive based vehicles.
		Through the use of unique gear arrangements and materials, Visteon's Power Transfer Units provide high torque dense designs in package efficient arrangements.
	www.visteon.com /products/automotive/powertransfer_unit.shtml (78 words)

	Read about Power failure transfer at WorldVillage Encyclopedia. Research Power failure transfer and learn about Power ... (Site not responding. Last check: 2007-11-03)
		In telephony, a function which, when activated in the event of a commercial power failure or a low-voltage battery condition at a
		subscriber location, supplies power to predesignated subscriber equipment via the central office trunk.
		Note: Power-failure transfer is an emergency mode of operation in which one and only one instrument may be powered from each trunk line from the subscriber location to the central office.
	encyclopedia.worldvillage.com /s/b/Power_failure_transfer (149 words)

	Connectorless, inductive-power, data-transfer system (Site not responding. Last check: 2007-11-03)
		The power and communications interface is via an inductive coupling, in which one part of the coupling is mounted on the AUV and the other part is mounted on the dock.
		Docking did not occur, so power/data transfer could not be performed during the Labrador Sea cruise.
		It was shown, however, that the data transfer components on both the vehicles and the docking stations were able to withstand the punishment of numerous deployments and recoveries.
	www.mbari.org /seminars/1998/mar25_blankinship.html (268 words)

	afrol News - World hails Burundi's power transfer
		World leaders however deplored the transfer was made in a continued climate of warfare and victimisation of civilians.
		Yesterday, former Vice President Domitien Ndayizeye was sworn in as Burundi's second Transitional President, together with Alphonse Kadege as Vice President, in the second phase of power transfer as outlined by the 2000 Arusha Peace Agreement.
		Human rights organisations, on the other hand, remained hesitant on congratulating the Burundians on the power transfer, as there is no end to Burundi's 10-year civil war in sight.
	www.afrol.com /articles/12992 (623 words)

	Democrats ignore Iraqi power transfer - (United Press International) (Site not responding. Last check: 2007-11-03)
		Bush was in Turkey attending a NATO conference when he heard of the transfer had gone via a note from national security adviser Condoleezza Rice, White House spokesman Scott McClellan said.
		Findings released Monday -- from polling conducted before the announced transfer of power -- indicated that most Americans approve of the handover and think it ameliorates the situation in Iraq.
		The Bush administration said Monday that although sovereignty had been transferred, security issues remained to be worked out, including whether former Iraqi leader Saddam Hussein would be transferred to the interim government.
	www.washtimes.com /upi-breaking/20040628-123902-5947r.htm (971 words)

	China completes orderly power transfer
		Hu Jintao became the undisputed leader of China as the country completed an orderly transfer of power on Sunday with the departure of former President Jiang Zemin from his top military post - giving a new generation a freer hand to run the world's most populous nation.
		The party spent nearly a decade preparing for the handover, hoping to avoid the upheavals that have accompanied earlier transfers of power.
		In a society where Mao declared that "power flows from the barrel of a gun," the chairmanship of the military commission was the second-most powerful post for a Chinese leader, after the job of party general secretary.
	www.chinadaily.com.cn /english/doc/2004-09/20/content_376012.htm (817 words)

	Another dynastic power transfer in N. Korea? - (United Press International) (Site not responding. Last check: 2007-11-03)
		Speculation is rife that Kim, the first ruler in communist history to succeed his father as head of state after a decades-long dynastic power inheritance program, has prepared to hand over his power to one of his three sons.
		It has also been rumored that a power struggle exists among the candidates for the leadership of the impoverished communist country.
		The decades-long father-to-son power inheritance program has helped Kim retain his grip on power despite turbulent economic changes and the demise of the communist ideology globally.
	www.washtimes.com /upi-breaking/20040901-073407-1219r.htm (1053 words)

	USATODAY.com - Power transfer in Iraq geared to elections (Site not responding. Last check: 2007-11-03)
		And both sides are looking to the June 30 transfer of power from U.S. occupation authorities to Iraqis for signs of when that might happen.
		A sovereign Iraqi government, albeit foreign-appointed and with limited powers, lays the groundwork for Iraq's first elections to be held early next year.
		After the power handoff, the more than 200,000 Iraqis trained for military and security duty will move from an apprentice force to the frontline duty, at first in joint patrols with U.S. forces.
	www.usatoday.com /news/world/iraq/2004-06-24-iraq-transfer_x.htm (797 words)

	About impedance Matching and power (Site not responding. Last check: 2007-11-03)
		We are taught that the maximum transfer of power occurs when the impedance of the source equals the load.
		Matching the impedance of a car battery to a load would probably cause a fire and explode the battery, but maximum power would be transferred to the load, at least till something burnt or exploded.
		A audio amplifier designed to work into an eight ohm speaker will produce almost twice as much power if connected to 2 eight ohm speakers in parallel, but the quality of the audio will surely be reduced.
	www.qsl.net /wa5bxo/power.html (274 words)

	baynews9.com - News : Local Iraqi American overjoyed about power transfer (Site not responding. Last check: 2007-11-03)
		The announcement of the transfer in power in Iraq caught many people by surprise, including Iraqi Americans in the Bay area who have spent many months waiting for this day to come.
		Largo resident Ahmad Kubba said Monday's transfer of power, two days ahead of schedule, is like the Fourth of July for Iraqis.
		Kubba said Iraqis know the transfer of power from a dictatorship to a civil society will be a big task, but he thinks his country is ready to handle it.
	www.baynews9.com /content/36/2004/6/28/47096.html (258 words)

	Asia Times - Asia's most trusted news source for the Middle East
		The war in Iraq may be blowing up in the Bush administration's face, but the White House is conspiring to maintain substantial military, political and economic power in the war-torn country following a deeply suspect "transfer of sovereign power" to an interim Iraqi government on June 30.
		At this stage, the Bush regime needs the UN to work out the logistics of the supposed transfer of power to the Iraqis June 30.
		They believe that their 65 percent majority entitles them to power commensurate to their numbers in the new "democratic" government.
	www.atimes.com /atimes/Middle_East/FD23Ak02.html (2102 words)

	David Butcher: Pedal Powered Generator (Site not responding. Last check: 2007-11-03)
		This combination makes the best of both power sources, as efficiency would be very high, because the solar output would not suffer the losses of being stored and then extracted from a battery.
		Belts also work best when transferring low torque at high speed (the opposite of what a pair of legs produce!) which is why you do not see them on bicycles, for example.
		Some of the devices shown in the movies are powered by 110v AC through an inverter, some are powered from 12 volts DC directly from the Pedgen I, and some are powered mechanically.
	www.los-gatos.ca.us /davidbu/pedgen.html (3974 words)

	Power Transfer in Iraq Starts This Week (washingtonpost.com)
		The United States begins the complicated political, economic and security transfer with a general framework and a June 30 deadline for completion.
		But critical details are still being negotiated between the Iraqis and U.S. administrator L. Paul Bremer, some of which could determine whether the new Iraqi government is ultimately embraced by the majority of Iraq's 22 million people.
		As the effort to turn over power begins in earnest, symbolic actions are planned: town halls to launch a nationwide political dialogue, graduation this week of an Iraqi army battalion, completion of the new currency exchange, the first cell phone system.
	www.washingtonpost.com /ac2/wp-dyn/A52841-2004Jan3?language%3Dprinter (1354 words)

	FACTS boosts regional power transfer in India (Site not responding. Last check: 2007-11-03)
		An ABB flexible AC transmission system (FACTS) solution has improved power transfer between two of India’s four regional power grids by an estimated 40 percent.
		The problem is when power is transferred from one electrical grid to another, low-frequency oscillations occur which affect stability and increase the risk of flouts.
		As a result the amount of power transferred from east to west India has increased by an estimated 40 percent.
	www.abb.com /global/seitp/seitp202.nsf/0/791524066984e343c1256fb3004b597e!OpenDocument (242 words)

	Amazon.com: Books: Transfer of Power (Site not responding. Last check: 2007-11-03)
		In "Transfer of Power," the chair of the Democratic National Committee has accepted a $500,000 "donation" in return for arranging a last-minute meeting between the donor, supposedly a Prince of Oman, and the President.
		Transfer of Power is a great introduction to the series as it lays the groundwork for the interactions between Flynn's characters and their respective roles in the government.
		Transfer of Power is the first book in Vince Flynn's series of political thrillers.
	www.amazon.com /exec/obidos/tg/detail/-/0671023209?v=glance (2561 words)

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