Abstract: Apparatus and system for power conversion. In one embodiment, the apparatus comprises a power converter comprising a first plate for receiving an input power; a second plate for providing an output power; a plurality of power converter bricks coupled in parallel between the first and the second plates, each power converter brick comprising (i) an input stage for converting a brick input power to a second power, (ii) an output stage, coupled to the input stage by a transformer, for converting the second power to a brick output power, (iii) a local controller coupled to the input stage for controlling power conversion by the power converter brick; and a master controller coupled to each power converter brick of the plurality of power converter bricks, wherein the master controller dynamically controls operation of each power converter brick of the plurality of power converter bricks to generate the output power.

Abstract: A bus system includes a plurality of stubs; a plurality of connectors, each of which is serially coupled between a corresponding one of the stubs and a corresponding one of memory modules; a plurality of first serial loads, each of which is serially coupled to a corresponding one of the connectors; and a plurality of second serial loads, each of which is serially coupled to characteristic impedance of a transmission line of a corresponding one of the stubs, wherein the first and the second serial loads are determined to be impedance matched at each transmission line terminal of the stubs.

Abstract: A vertically packaged cellular power converter solves the problems associated with conventional designs and paves the way for a cellular circuit architecture with ultra-low interconnect resistance and inductance. The vertical packaging results in a power flow in the vertical direction (from the bottom to the top) with very short internal interconnects, thereby minimizing the associated conduction losses and permitting high conversion efficiency at high currents. The cellular architecture is ideally suited for generating multiple supply voltages.

Abstract: A filter uses a special autotransformer that has a ferromagnetic core with a plurality of legs and flux return bars. A first coil is located on one leg, and a second coil is located on the same leg, but spaced from the first coil. The first coil and at least part of the second coil are connected in series to receive distorted alternating current and at least that part of the second coil is connected to an output terminal. Between the coils and extending at least part of the way from the first leg to an adjacent leg is a magnetic shunt assembly to divert part of the flux generated in the first coil by the alternating current so that that part does not link with the second coil. An air gap is located to link with the second coil to create an inductor in that coil by flux in the second coil, and a capacitor is connected across the second coil to tune it to the fundamental frequency of the alternating current and substantially reduce harmonics in that current.

Abstract: An uninterruptable power supply system for producing an AC voltage from at least one of a DC power source or an AC power source includes an input terminal configured to receive an AC voltage from an AC power source, and an inverter operative to produce an AC voltage at an output thereof from a DC power source. A ferroresonant transformer circuit includes a transformer having an input winding, a output winding, and a third winding that forms part of a resonant circuit that produces saturation in the output winding when an AC voltage on the input winding exceeds a predetermined amplitude. A transformer input control circuit is coupled to the input terminal and to the inverter output and is operative to couple at least one of the input terminal and the inverter output to the input winding.

Abstract: A series-fed light monitoring system, used for example for runway lights at airports, and fed by a low-frequency feeding current, comprises at least one series loop having one or more loading points connected in series in the form of fittings with lamps or the like, each loading point being connected to the loop via transformer coupling comprising in series a high-frequency transformer, a switch and a choke. The switch and the choke are connected in series in the series loop and the high-frequency transformer is connected on the primary side to the series loop and on the secondary side to the loading point. The choke has an inductance so as not to hinder a low-frequency feeding current in the loop but provide high impedance at the switching frequency.

Abstract: A ferroresonant regulator for use in an inductively coupled high frequency power distribution system. A constant current resonant power source, comprising a sine wave oscillator (12), an amplitude controlled amplifier (16), a power amplifier (20), and an impedance matching transformer (24), provides current at a frequency of 38 kHz to a supply loop (68) that is installed in the floor of an aircraft passenger space. A current sensing transformer (32), and a voltage sensor (46) produce feedback signals that are used to control the amplitude of the current circulating in the supply loop, maintaining it substantially constant. A plurality of multiturn coils (70) are disposed proximate the supply loop. Connected to each of the multiturn coils is a saturable transformer (76), which includes a secondary winding attached to a load comprising an entertainment and passenger service system installed in each seat. A tertiary winding (106) on the saturable transformer is connected across a resonance capacitor (108).

Abstract: A battery charger for incorporation into an electric-powered vehicle is disclosed. The charger includes a ferroresonant voltage-regulating circuit for providing an output voltage proportional to the frequency of an input AC voltage. A high frequency converter converts a DC voltage supplied, for example, from a rectifier connected to a standard AC outlet, to a controlled frequency AC voltage which is supplied to the input of the ferroresonant circuit. The ferroresonant circuit includes an output, a saturable core transformer connected across the output, and a first linear inductor and a capacitor connected in series across the saturable core transformer and tuned to resonate at the third harmonic of the AC voltage from the high frequency converter. The ferroresonant circuit further includes a second linear inductor connected between the input of the ferroresonant circuit and the saturable core transformer.

Abstract: An inductor structure is combined with a ferroresonant regulator as a filter inductor in one instance, and as a regulating inductor in another. In one example, a ferroresonant voltage regulator includes a pair of shunt filters at its output to reduce the low order odd harmonic content of the AC output. The filtering arrangement includes two LC shunt filters having their independent inductor windings wound on a single magnetic core unit. Auxiliary windings coupled to each of the inductor windings are placed in series with the output to buck any remaining harmonics.In a second instance, independent regulating inductors in a multiphase ferroresonant regulator are also realized on a single magnetic structure.

Abstract: A two-part separable inductive coupler is provided in one part with a current-limiting reactor whose control winding is energized by control means in response to the formation of a magnetic circuit between primary and secondary windings incorporated in said one part and the other said part respectively. Said control means may comprise a rectifier connected across said primary winding and is arranged to saturate the reactor when the coupler parts are connected and leave the reactor unsaturated when the parts are separated, so as to limit the primary current.

Abstract: A polyphase line voltage regulator which uses polyphase pulse saturable ferroresonant reactors in series with three separate and equal input chokes. The line voltage regulator is particularly suitable for computer operations which impose a variable current demand on the power source. The input chokes are directly coupled with an unregulated a.c. source and are provided with controlled non-linearity. LC tuned circuits inhibit the second and third harmonics from the regulated a.c. voltage. An isolation transformer is connected across the polyphase pulse saturable ferroresonant reactors and delivers a voltage regulated a.c. output voltage to a load.

Abstract: A self-regulating power supply for a television receiver includes a transformer with a primary winding coupled to a source of input voltage for developing an alternating polarity supply voltage across a secondary winding. The supply voltage is stepped up, rectified and filtered to develop an ultor accelerating potential for the picture tube of the television receiver. A ferroresonant or self-regulating load circuit includes a saturable reactor having a winding coupled to the transformer secondary winding to provide regulation of the supply voltage, and thus, regulation of the ultor accelerating potential. The transformer secondary winding and the saturable reactor winding each comprises two winding sections, with each section having a terminal coupled to a common reference point, such as chassis ground.

Abstract: A ferroresonant power supply having a relatively temperature stable output voltage includes a saturating magnetic element having a magnetizable core and a winding located thereon. A magnetizing current is developed in the winding by a high frequency source of alternating input voltage for generating an alternating magnetic flux in the magnetizable core that links the winding so as to develop an alternating polarity output voltage. A capacitor develops a circulating current that generates a magnetic flux in a core section associated with the winding that aids in magnetically saturating the core section to provide regulation of the alternating polarity output voltage by means of ferroresonant action. In order to temperature stabilize the output voltage, the magnetically saturating core section of the magnetic element is formed of a ferrospinel comprising a lithium ferrite or a substituted lithium ferrite.

Abstract: A primary winding of a power transformer is coupled to a source of DC voltage. First and second controllable switches are coupled to the primary winding in a push-pull arrangement. A control circuit responsive to a deflection rate input signal that is synchronized with deflection circuit scanning applies a turn-off switching signal alternately to the two controllable switches during each deflection cycle. In response to the turnoff of each one of the two controllable switches, a turn-on switching signal is applied to the other switch to develop a deflection rate alternating polarity output voltage across an output winding of the power transformer. The output voltage is rectified and applied to a deflection generator to thereby energize the generator into developing scanning current in a deflection winding.

Abstract: Power conditioning apparatus particularly suited for computer facilities and including non-linear input chokes connectible with line power. The outputs of the input chokes are serially, magnetically coupled through primary windings to pulse saturable reactors of a synthesizing network which includes a capacitor bank and operates to synthesize a sinewave output. Series tuned traps are coupled to the synthesizer network to avoid the development of harmonics above fundamental.

Abstract: An a.c. Resonance Transformer for operating at a predetermined frequency. The transformer comprises a resonant .pi.-type or T-type stage. The .pi.-type stage includes three series connected four-terminal networks. The first of the networks and the third of the networks includes a shunt reactor of a first type. The second of the networks includes two series connected second type reactors and a first type reactor shunt connected to the junction between the second type reactors. The reactors in the second of the networks are sized so that when an input signal of a predetermined frequency is applied to the input of the first of the networks, a 180.degree. phase shift is provided between the phase angle of the input and output voltage vectors of the second of the networks and so that a zero input impedance is provided when the output is short circuited.

Abstract: The primary winding of a saturable transformer is coupled to an alternating current source by a series tuned filter network. The transformer secondary winding is coupled to a load network by a second series filter tuned to the source frequency to block harmonics generated by the saturation limiting action of the transformer, which occurs below the normal voltage level of the source and regulates the output voltage supplied to the load within predetermined limits over the source operating voltage range. The first filter is tuned at a predetermined level above the source frequency to cooperate with the equivalent inductance of the unsaturated transformer and output network to hold the secondary output in phase with the input signal at a low levels of the source voltage.