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	4.9:Maximum Power Transfer Theorem
		This theorem is used to ensure that a load receives maximum power from the source.
		(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.
		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)

	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)

	Power
		The commonest non-SI unit of power is the horsepower, which is equivalent to 33,000 foot-pounds per minute, or the power required to lift 550 pounds one foot in one second, and is equivalent to about 746 watts.
		The power consumption of a human is on average roughly 100 watts, ranging from 85 W during sleep to 800 W while playing a strenuous sport.
		The average power load by a two-terminal electrical device is a function of the root mean square values of the sine-shaped voltage across the terminals and the sine-shaped current passing through the device.
	www.ebroadcast.com.au /lookup/encyclopedia/po/Power.html (330 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		In electrical engineering, the maximum power (transfer) theorem states that, to obtain maximum power from a source with a fixed internal resistance, the resistance of the load must be made the same as that of the source.
		The theorem was originally misunderstood (notably by Joule) to imply that a system consisting of an electric motor driven by a battery could not be more than 50% efficient since, when the impedances were matched, the power lost as heat in the battery would always be equal to the power delivered to the motor.
		Power factor correction (where an inductive reactance is used to "balance out" a capacitive one), is essentially the same idea as conjugate impedance matching although it is done for entirely different reasons.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=maximum_power_theorem (1081 words)

	Maximum Motor Power
		The answer is not when the motor is driven at maximum current, though that will cause the most torque and power loss in the windings.
		The mechanical power is the power delivered into the induced voltage source (right) by the motor supply (left).
		Maximum mechanical power occurs when the loss in the winding resistance equals the mechanical (output) power, or (by the maximum power transfer theorem) whenever:
	www.innovatia.com /Design_Center/Maximum_Motor_Power.htm (453 words)

	Power (physics) - Wikinfo
		The power consumption of a human is on average roughly 100 watts, ranging from 85 W during sleep to 800 W while playing a strenuous sport.
		The average power consumed by a two-terminal electrical device is a function of the root mean square values of the sinusoidal voltage across the terminals and the sinusoidal current passing through the device.
		The efficient transfer of electrical power is governed by the maximum power theorem.
	www.wikinfo.org /wiki.php?title=Power_(physics) (1420 words)

	PowerPedia:Generator - PESWiki
		This theorem states that the maximum power can be obtained from the generator by making the resistance of the load equal to that of the generator.
		Engine-generators produce alternating current power that is used as a substitute for the power that might otherwise be purchased from a utility power station.
		Standby power generators are permanently installed and kept ready to supply power to critical loads during temporary interruptions of the utility power supply.
	peswiki.com /index.php/PowerPedia:Generator (1910 words)

	FEEE - Fundamentals of Electrical Engineering and Electronics: Maximum Power Transfer Theorem
		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.
		Power dissipation increased for both the Thevenin resistance and the total circuit, but it decreased for the load resistor.
		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.vias.org /feee/dcnet_12.html (464 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		The maximum power principle has been proposed as the fourth principle of energetics in open system thermodynamics, where an example of an open system is a biological cell.
		Gilliland stated that in maximum power theory the second law efficiency of thermodynamics required an additional physical concpet: "the concept of second law efficiency under maximum power" (Gilliland 1978, p.
		In this way the concept of maximum power was being used as a principle to quantitatively describe the selective law of biological evolution.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=maximum_power_principle (1237 words)

	Maximum power transfer theorem
		As we have shown in the Thevenin’s Theorem and Norton’s Theorem chapters, the easiest method is to replace voltage sources by short circuits and current sources by open circuits, then find the total resistance between the two load terminals.
		Efficiency is defined by the ratio of the power received by the load to the total power supplied by the source.
		Another undesirable consequence of arranging a load to achieve maximum power transfer is the 50% voltage drop on the internal resistance.
	www.tina.com /course/11maxim/maxim.htm (691 words)

	Jacobi's Theorem
		Hence the theorem: Maximum power is transferred when the internal resistance of the source equals the resistance of the load.
		Let's look at the theorem again, and ask what is the maximum power that can be obtained when the load resistance R' is fixed, and the internal resistance R is variable.
		In radio circuits, the internal resistance of a source of power cannot usually be reduced to a small value, so the load resistance is made equal to it for maximum power transfer.
	www.du.edu /%7ejcalvert/tech/jacobi.htm (713 words)

	Thevenin Equivalent Circuits
		Above we have derived the maximum power theorem as it is usually presented.
		Maximum power is delivered to a load when it drops the terminal voltage to half the open circuit voltage and the load current is half the short circuit current.
		For example, the power supplied by this source may still be viewed as the area of a rectangle at a point on the curve.
	www.facstaff.bucknell.edu /mastascu/ELEC120WebSite/eLessonsHTML/Source/Source2.html (3366 words)

	[No title]
		Experience experimental verification of the superposition theorem, Thevenin’s theorem, and the maximum power transfer theorem in DC circuits, and perform phase shift measurements in AC circuits having sinusoidal inputs, with comparison of lab data to theoretical calculations based on the lab circuit parameters.
		Measure three-phase AC power, currents, and voltages to motor and calculate real power and power factor at motor input, overall motor efficiency, and other motor parameters at a variety of loads.
		The superposition theorem, Thevenin’s theorem, and the maximum power transfer theorem are verified using dc circuits.
	studentweb.tulane.edu /~skrivent/syllabus.doc (534 words)

	Facts about maximum power theorem
		In electrical engineering, the maximum power theorem states that for the transfer of maximum power from a source with a fixed internal resistance to a load, the resistance of the load must be the same as that of the source.
		The maximum power theorem is only a part of the reason for this requirement.
		The theorem was originally misunderstood (particularly by Joule) to imply that a system consisting of an electric motor driven by a battery could not be more than 50% efficient, since the power lost as heat in the battery would always be equal to the power delivered to the motor.
	www.supercrawler.com /Facts/maximum_power_theorem.html (432 words)

	Experiment #4
		The aim is to transfer maximum power from the circuit to the load(RL).
		Maximum Power Transfer - Calculation to find RL Use the following circuit specifications along with the general equation that you developed in Part 6 and find the value of RL that consumes maximum power from the circuit.
		When maximum PL is found, disconnect V1 from the circuit and measure RL as accurately as possible.
	www.seas.gwu.edu /~ece11/fall04/lab_ex4.html (732 words)

	Battery History, Technology, Applications and Development
		We think of a battery today as a source of portable power, but it is no exaggeration to say that the battery is one of the most important inventions in the history of mankind.
		They operated by storing water behind a dam during high tide, and letting it out to power the mill after the tide had receded and were the forerunners of the modern schemes for capturing tidal energy.
		Many wondrous powers have been ascribed to magnets and to this day magnetic bracelets are believed by some to have therapeutic benefits.
	www.mpoweruk.com /history.htm (17340 words)

	Norton's Theorem : DC NETWORK ANALYSIS
		Norton's Theorem states that it is possible to simplify any linear circuit, no matter how complex, to an equivalent circuit with just a single current source and parallel resistance connected to a load.
		As with Thevenin's Theorem, everything in the original circuit except the load resistance has been reduced to an equivalent circuit that is simpler to analyze.
		Norton's Theorem is a way to reduce a network to an equivalent circuit composed of a single current source, parallel resistance, and parallel load.
	www.allaboutcircuits.com /vol_1/chpt_10/9.html (581 words)

	Thomas Alva Edison
		When you operate at the conditions specified by your maximum power transfer theorem, the resistance of the load and the resistance of the generator are the same.
		But as the very success of Edison's early electric power systems caused the demand for the systems, and thus their size, to grow, the low voltage caused the DC systems to be either costly (if you used big wire) or inefficient (if you used smaller wire).
		DC power still is the choice for autos, where distance is not a big factor and where DC power is the power type of choice for the increasing amount of electronic equipment, such as antilock braking systems and electronic ignitions, that autos now include.
	www.ece.msstate.edu /courses/ece1002/notes/edison.htm (4084 words)

	ECE 95L Experiment 2 (Site not responding. Last check: )
		Introduction Thevenin's Theorem states that any linear resistive network that contains independent voltage and current sources can be replaced by a voltage source (Vth) and a resistor (Rth) connected in series.
		The Maximum Power Transfer Theorem states, under the assumptions stated above, that maximum power is transferred to a load resistor R
		In both plots show the point on the graph corresponding to the value of RL that theoretically maximizes the load power.
	www.ecst.csuchico.edu /~ubalaji/EECE211L_F06/E211E3_rev_1.htm (452 words)

	BOWest Library - Electrical Circuit Theorems
		When a current I is passed through a resistance R, the resulting power P dissipated in the resistance is equal to the square of the current I multiplied by the resistance R:
		When the impedance of a load connected to a power source is varied from open-circuit to short-circuit, the power absorbed by the load has a maximum value at a load impedance which is dependent on the impedance of the power source.
		Note that power is zero for an open-circuit (zero current) and for a short-circuit (zero voltage).
	www.bowest.com.au /library/theorems.html (939 words)

	Maximum power theorem - Definition, explanation
		This theorem is of use when driving a load such as an electric motor from a battery.
		The maximum power theorem differs in that the reactive components are not matched, but reversed.
		In 1880 this assumption was shown to be false by either Edison or his colleague Francis Robbins Upton, who realised that the theorem could be sidestepped by making the resistance of the source (whether a battery or a dynamo) close to zero.
	www.calsky.com /lexikon/en/txt/m/ma/maximum_power_theorem.php (584 words)

	Tutorials - Maximum Power Transfer Theorem
		“For a source to transfer maximum power to a load connected to it, the load impedance must be the complex conjugate of the source impedance”.
		For a complex impedance load and source, the maximum power transfer therefore occurs at a singe frequency.
		We know that the power in the load is the product of the current flowing through it and the potential difference across it – V x I. If we gradually reduce the size of the load towards zero, then the current through it will increase causing the power to increase.
	mysite.wanadoo-members.co.uk /phil_robinson/max.html (455 words)

	Maximum Power Transfer Theorem - DC Network Analysis
		This is essentially what is aimed for in stereo system design, where speaker "impedance" is matched to amplifier "impedance" for maximum sound power output.
		Having reduced a network down to a Thevenin voltage and resistance (or Norton current and resistance), you simply set the load resistance equal to that Thevenin or Norton equivalent (or visa-versa) to ensure maximum power dissipation at the load.
		Δ and Y networks are seen frequently in 3-phase AC power systems (a topic covered in volume II of this book series), but even then they're usually balanced networks (all resistors equal in value) and conversion from one to the other need not involve such complex calculations.
	www.opamp-electronics.com /tutorials/maximum_power_transfer_theorem_1_10_11.htm (1105 words)

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