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Topic: Saturable reactor

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Saturated model

Saturation

Dimmer

Thyristor

Inductor

Static VAR compensator

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	Saturable reactor - Wikipedia, the free encyclopedia
		A saturable reactor is a special form of inductor where the magnetic core can be deliberately saturated by means of a dc current flowing in a control winding.
		Saturable reactors provide a very simple means of remotely and proportionally controlling the flow of ac current into a load such as an incandescent lamp; the flow of ac is roughly proportional to the flow of dc in the control winding.
		Because the required inductance to achieve dimming varies with the size of the load, saturable reactors often have multiple taps, allowing a small inductance to be used with a large load or a larger inductance to be used with a smaller load.
	en.wikipedia.org /wiki/Saturable_reactor (227 words)

	United States Patent Application: 0040051487
		A reactor recirculation system in accordance with claim 22 wherein said lead compensation circuit comprises: an engagement switch that electrically couples said lead compensation circuit to said regulator; a current limiting resistor in electrical parallel with a switch contact; and at least one capacitor.
		A reactor recirculation system in accordance with claim 29 wherein said at least one capacitor comprises a plurality of capacitors and shorting contacts configured to selectively bypass each capacitor when said shorting contacts are in a closed first position and to not bypass said capacitor when in an open second position.
		Saturable reactor 228 is magnetically coupled to a primary winding (not shown) in power rectifier circuit 134 and a secondary winding (not shown) in negative and positive feedback circuit 154.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040051487".PGNR.&OS=DN/20040051487&RS=DN/20040051487 (4510 words)

	Wide range load current regulation in saturable reactor ballast - Patent 5432406
		A saturable reactor ballast consists of a ballasting inductor wound on the outer legs of an E-type magnetic core and connected in series with the fluorescent lamp load, and a control winding on the center leg of the same magnetic core.
		This result is surprising in view of the simplicity of the saturable reactor ballast, and the fact that its mode of current regulation, aside from the control current and lamp dimming feature, is essentially similar to that of a single winding ballast, which is the simplest type of current ballast for fluorescent lamps.
		Within a design range of the saturable reactor 30, the control voltage through the winding 40 may be varied continuously to achieve a corresponding continuous change in the arc current through the lamp load with a corresponding variation in the light output of the lamp.
	www.freepatentsonline.com /5432406.html (4451 words)

	Resonant-transition DC-to-DC converter - Patent 5132889 (Site not responding. Last check: 2007-10-03)
		The saturable reactors force unequal current distribution in the secondary windings during the free-wheeling intervals such that a primary current is caused to flow.
		wherein said second saturable reactor is in said high impedance state for at least a portion of said first half-cycle free-wheeling interval, and said first saturable reactor is in said high impedance state for at least a portion of said second half-cycle free-wheeling interval.
		Saturable reactor SR1 is serially connected between terminal 110 of T1.sub.S and the anode of diode D5.
	www.freepatentsonline.com /5132889.html (6165 words)

	Saturable reactor-type power supply - Patent 4103324 (Site not responding. Last check: 2007-10-03)
		A saturable reactor has a current winding and a control winding which are interlinked by a core of magnetic iron.
		This results because the reactance of the control winding of the saturable reactor tends to maintain the magnitude of the control current while the output is at the reduced value.
		Reactors 40, reactor control circuit 90, transformer 50, and rectification means 60 all operate in a conventional manner to supply a constant direct current to sputtering apparatus 80.
	www.freepatentsonline.com /4103324.html (4594 words)

	Warner Power Termiflex (Site not responding. Last check: 2007-10-03)
		Typical input voltage and current waveforms for a saturable core reactor power supply, with the core partially saturated, is shown in the oscilloscope picture of Fig.
		The inherent series reactance of a saturable reactor causes a phase shift between the voltage and current.
		A variation of saturable reactor control is the variable reactance transformer, which combines the saturable reactor and transformer functions onto a common core structure.
	warnerpower.com /technical/powerfactor1/power_supply_development.html (1384 words)

	Solid-state saturable reactor emulator - US Patent 5894216 (Site not responding. Last check: 2007-10-03)
		Although saturable reactors were widely used for many years, the development of high-power semiconductor switches (e.g., the thyristor) reduced the use of saturable reactors.
		The traditional, magnetic saturable reactor can be expensive and complex to produce, expensive in terms of real estate within a circuit, and has several non-ideal performance parameters resulting from magnetic core and winding interaction and other transformer-type losses and anomalies.
		1, a circuit is depicted that emulates a "normally-on" saturable reactor.
	www.patentstorm.us /patents/5894216.html (2683 words)

	Position encoder using saturable reactor interacting with magnetic fields varying with time and with position - US ... (Site not responding. Last check: 2007-10-03)
		A saturable magnetic element is located in the positionally varying magnetic field of the magnetic scale and an excitation winding is provided which, when energized, generates a magnetic filed which interacts with the positionally varying magnetic field to cause different portions of the saturable magnetic element to saturate and desaturate at different times.
		An apparatus as in claim 4, wherein said saturable magnetic element lies in a plane, and wherein the loops of said sense conductor lie in planes which are substantially orthogonal to the plane of said magnetic element.
		This arrangement permits the saturable magnetic element to be located as close as possible to the means for generating the positionally varying magnetic field, which is preferably a magnetic scale comprising a continuous alternating series of north and south poles, as this is cheap and easy to manufacture.
	www.patentstorm.us /patents/6118271.html (13607 words)

	DC-DC converter with saturable reactor reset circuit - Patent 4811187 (Site not responding. Last check: 2007-10-03)
		An emitter of a transistor 10 for controlling the resetting of the saturable reactor 5 is connected to the positive output terminal 12, and a collector thereof is connected to a point between the saturable reactor 5 and the anode of the diode 6.
		3, a saturable reactor 5 is connected to a negative end of a secondary winding 22, and a path for reset current ir is formed along a transistor 10, a diode 15 and a saturable reactor 5 and back to a negative output terminal 13.
		That is, voltage applied to the saturable reactor 105 by the controlling winding 153 is Vo.times.n.sub.M1 /n.sub.M2, wherein Vo is output voltage, and n.sub.M1 and n.sub.M2 are the numbers of turns of the first and second windings 152, 153, respectively.
	www.freepatentsonline.com /4811187.html (4562 words)

	Special transformers and applications - Chapter 9: TRANSFORMERS - Volume II - AC
		A saturable reactor capitalizes on this effect by forcing the core into a state of saturation with a strong magnetic field generated by current through another winding.
		Also, saturable reactors tend to regulate AC power only in one direction: in one half of the AC cycle, the mmf's from both windings add; in the other half, they subtract.
		A saturable reactor is a special type of inductor, the inductance of which can be controlled by the DC current through a second winding around the same core.
	www.allaboutcircuits.com /vol_2/chpt_9/7.html (3310 words)

	[No title]
		] An iron-core reactor having an additional control winding that carries direct current whose value is adjusted to change the degree of saturation of the core, thereby changing the reactance that the alternating-current winding offers to the flow of alternating current; with appropriate external circuits, a saturable reactor can serve as a magnetic amplifier.
		] An adiabatic process in which the air is maintained at saturation by the evaporation or condensation of water substance, the latent heat being supplied by or to the air respectively; the ascent of cloudy air, for example, is often assumed to be such a process.
		] A device, equipment, or person that saturates one material with another; examples are a tank in which vapors become saturated with ammonia from coal (in carbonization of coal), a humidifier, and the operator of a machine for impregnating roofing felt with asphalt.
	www.accessscience.com /Dictionary/S/S5/DictS5.html (2579 words)

	MARELCO POWER SYSTEMS, Inc. (Site not responding. Last check: 2007-10-03)
		A saturable reactor consists of a coil or winding connected to a DC circuit which is used to energize a core which has an AC coil or winding.
		A saturable reactor is an ideal current limiting device provided an appropriate signal is fed into it to limit the current on the main load or heating elements.
		Saturable reactors can be used on practically any application requiring a variable voltage, or even a constant voltage with a varying input.
	www.marelco.com /faq.htm (9472 words)

	Saturable Reactor Encyclopedia Article, History, Biography at Karr.net (Site not responding. Last check: 2007-10-03)
		Looking For saturable reactor - Find saturable reactor and more at Lycos Search.
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	www.karr.net /search/encyclopedia/Saturable_reactor (339 words)

	Metglas®
		Thus, if the saturable reactor were replaced with a jumper wire the output would be 20 V. This is a result of the output filter averaging the voltage at its input.
		With the saturable reactor installed and a clamp voltage (Vc) set at -24 V, the applied reset will be 16 V x 5 us, or 80 volt-microseconds.
		In fact, the requirement for the mag amp reactor is the same for current limiting as it is for regulating down to low values of output current, where the output choke (or output inductor) current is discontinuous.
	www.designer-iii.com /cco/Metglas/c0300r34.htm (3775 words)

	Saturable reactor Definition / Saturable reactor Research (Site not responding. Last check: 2007-10-03)
		A saturable reactor was a special form of inductor where the magnetic core could be deliberately saturated by means of a dcDirect current (DC or "continuous current") is the continuous flow of electricity through a conductor such as a wire from high to low potential.
		Once saturated, the inductanceInductance is a physical characteristic of an inductor, which is an electrical device that produces at any time a voltage proportional to the instantaneous rate of change in current flowing through it.
		The symbol L is used for inductance in honour of the physicist Heinrich Lenz.
	www.elresearch.com /Saturable_reactor (240 words)

	Submarine Electrical Systems - Chapter 9
		A reactor type automatic voltage regulator is essentially a series of electrical and magnetic circuits so connected that they automatically control the field current of the a.c.
		The current in coil B tends to reduce the saturation of the reactor and is supplied by rectifier No. 2.
		Coil C of the saturable reactor receives a constant potential from one of the batteries while a rheostat inserted in the battery circuit supplying coil B permits voltage to that coil to be varied.
	www.hnsa.org /doc/fleetsub/elect/chap9.htm (2569 words)

	Pulse Power Cores - Saturable Reactors
		Saturable reactors utilize the large change between unsaturated and saturated permeabilities of their cores to delay current for a preset period of time.
		By using a saturable reactor in series with either a semiconductor or thyratron switch, the circuit designer can reduce losses in the switch and extend its life.
		The saturable reactor is designed to hold-off current until the switch becomes fully conductive (see figure, right).
	www.metglas.com /products/page5_1_3.htm (240 words)

	US PATENT SUBCLASS 330 / 8-- WITH SATURABLE REACTOR-TYPE AMPLIFYING DEVICE (Site not responding. Last check: 2007-10-03)
		(under the class definition) Subject matter wherein the amplifying device is a saturable magnetic core with at least means to apply an electrical signal and an A.C. power supply to at least one winding thereon; the input signal which may be D.C..
		Therefore subject matter involving saturable reactors without filter means is not classified in this class with amplifiers, but is classified elsewhere.
		Subject matter involving saturable reactors claiming a "demodulator" and disclosing a filter therewith but not claiming the filter are assumed to claim the filter as part of the demodulator and are classified herein.
	www.patentec.com /data/class/defs/330/8.html (233 words)

	Mark Solis on Superluminal Particles (Site not responding. Last check: 2007-10-03)
		A saturable reactor is a ferromagnetic ring with four coil windings: (1) a small-signal input winding, (2) a field bias winding, (3) a large field input winding, and (4) a large-signal output winding.
		By adjusting the level of field bias, and therefore the magnetic saturation level of the ferromagnetic ring, a small input signal can cause a large variation in the mutual field coupling between the field input winding and the output winding.
		Equipped with superspin, the analogy of the accelerating particle to the saturable reactor is based on the idea that even as an inductor with an expanding field has a counter-emf, and an inductor with a collapsing field has a co-emf, so a superspin is reactive when energy is stored, and antireactive when energy is released.
	americanantigravity.com /articles/203/3/Mark-Solis-on-Superluminal-P... (1017 words)

	Class 330: AMPLIFIERS / U.S. Patent Classification Definitions
		Saturable reactor circuits for wave shaping, switching, pulse production, etc.., analogous to similar electronic tube circuits are classified elsewhere with nonlinear reactor systems, and computers using magnetic amplifiers are also classified elsewhere.
		Where a nonlinear capacitor serves as the active element or amplifying device in a circuit which switches, shapes a wave, or produces pulses and is not provided for elsewhere classification is in Class 307.
		Subject matter wherein the amplifying device is a saturable magnetic core with at least means to apply an electrical signal and an A.C. power supply to at least one winding thereon; the input signal which may be D.C..
	www.uspto.gov /go/taf/def/330.htm (13891 words)

	Dairyland Electrical Industries - VTNI Technological Comparisons (Site not responding. Last check: 2007-10-03)
		Saturable Reactor: The impedance changes as the voltage across the winding increases.
		For this reason, some saturable reactors also have a spark gap arrester in parallel with the winding, to limit over-voltages.
		Saturable Reactor: Requires a variable AC source to be applied to the system to verify that the device blocks.
	dairyland.com /index.php?page=products_vtni_technological_comparisons (887 words)

	Saturable reactor - Encyclopedia Glossary Meaning Explanation Saturable reactor (Site not responding. Last check: 2007-10-03)
		Saturable reactor - Encyclopedia Glossary Meaning Explanation Saturable reactor.
		Here you will find more informations about Saturable reactor.
		The orginal Saturable reactor article can be editet
	www.encyclopedia-glossary.com /en/Saturable-reactor.html (272 words)

	Flux paths in a saturable-core reactor. FLUX AIDING
		When the saturable-core reactor is set at the knee of the magnetization curve, any small increase in control current will cause a large increase in load current.
		However, a saturable-core reactor is NOT a magnetic amplifier.
		A magnetic amplifier differs from a saturable-core reactor in one important aspect: A magnetic amplifier has a rectifier in addition to a saturable-core reactor.
	www.tpub.com /neets/book8/32n.htm (633 words)

	Lessons In Electric Circuits -- Volume II (AC) - Chapter 9
		This "tank circuit" serves as a filter to reject harmonics created by the core saturation, and provides the added benefit of storing energy in the form of AC oscillations, which is available for sustaining output winding voltage for brief periods of input voltage loss (milliseconds' worth of time, but certainly better than nothing).
		Magnetic saturation of a transformer core may be caused by excessive primary voltage, operation at too low of a frequency, and/or by the presence of a DC current in any of the windings.
		Saturation may be minimized or avoided by conservative design, which provides an adequate margin of safety between peak magnetic flux density values and the saturation limits of the core.
	www.patchn.com /AC/AC_9.html (14661 words)

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