Abstract: A reconfigurable multi-cell power converter and method wherein a set of cells are connected between an input bus and a load in an input series output parallel configuration or in an input parallel output series configuration. Each cell includes a primary side reconfigurable between series and parallel operation and a secondary side also reconfigurable between series and parallel operation. Switching circuitry is configured to reconfigure the primary side of each cell between series and parallel operation and vice versa and also to reconfigure the secondary side of each cell between series and parallel operation and vice versa. A controller is configured to actuate the switching circuitry depending a voltage on the input bus and/or cell condition to reconfigure all the cell primary sides and/or secondary sides while maintaining a desired input series output parallel or input parallel output series connection for the set of cells.

Abstract: A high voltage gain power converter includes: a main switch element; an assistant switch element; a first inductive element, a first switch element, and a first capacitive element; and a second inductive element, a second switch element, and a second capacitive element. The first inductive element is connected between an input node and first switch element. The first capacitive element, connected between the first switch element and ground, provides a first boost output voltage. The second inductive element is connected between the main switch element and first capacitive element. The second switch element is connected to a common node of the second inductive element and main switch element. The second capacitive element, connecting the second switch element to a first node, provides a second boost output voltage. The assistant switch element is connected between the first inductive element and common node of the second inductive element and main switch element.

Abstract: An arrangement to determine a cell capacitor voltage value of a cell of a multi-cell power converter includes the cell and a control unit. The cell itself includes four power electronic valves interconnected as a full-bridge converter having a first and a second phase leg, where each phase leg includes a series-connection of two of the four power electronic valves and where the connection point between the two power electronic valves of each phase leg is externally connectable, a cell capacitor being connected in parallel to the first and the second phase legs, and four gate units, each being connected to a corresponding one of the power electronic valves as well as to the control unit.

Abstract: A method of reducing switching losses in a power supply includes the steps of advancing the output voltage of a first pole of a power cell by a first angle, retarding the output voltage of a second pole of the power cell by a second angle, and producing a combined output voltage of the power cell equal to a positive pulse of a duration angle equal to the sum of the first angle and the second angle for a first half of a switching cycle of the power cell, and equal to a negative pulse of a duration angle equal to the sum of the first angle and the second angle for a second half of the switching cycle of the power cell.

Abstract: A power conversion device includes input terminals, first output terminals, second output terminals, and an insulation transformer. The insulation transformer includes a primary coil and a secondary coil of equal inductance. The polarity of one end of the primary coil is same as the polarity of the other end of the secondary coil. One of the first output terminals is connected to an input terminal and the one end of the primary coil. The other of the first output terminals is connected to an input terminal and one end of the secondary coil. One of the second output terminals is connected to the other end of the primary coil and the other end of the secondary coil. The other of the second output terminals is connected to an input terminal.

Abstract: Three or more circuits including a driving inverter circuit and rectifier circuits are connected in series, each of the circuits including a high-voltage side MOSFET and a low-voltage side MOSFET connected in series as well as a smoothing capacitor having positive and negative terminals between which the MOSFETs are connected. LC series circuits, each including a capacitor and an inductor, are disposed individually between one specific circuit and the other circuits with periods of resonance of the LC series circuits made equal to one another. In performing DC/DC power conversion through charging and discharging operation of the capacitors, a resonance phenomenon of the LC series circuits is used to improve conversion efficiency and achieve a reduction in size of the apparatus structure.

Abstract: A power supplying apparatus includes a conversion device to convert direct current (DC) power from a battery set into alternating current (AC) power. A current transformer arrangement may generate a DC charging signal based on the AC power and provide the DC charging signal to the battery set. The current transformer may include a plurality of current transformers.

Abstract: Provided is a contactless power receiving unit which has a simple configuration, and which is capable of generating constant induced electromotive force regardless of the orientation of a power receiving coil. Multiple power receiving coils are arranged to form certain relative angles to one another in a parallel magnetic field generated by a power supply unit. A rectifier circuit is connected to each power receiving coil. An adder circuit is configured to add DC power obtained, through the rectifier circuits, from the multiple power receiving coils, and to output resultant DC power of the addition.

Abstract: An uninterruptible power supply has first and second input terminals, first and second inductors, first and second AC switch units, first and second storing devices and a control unit. The first and the second inductors are electrically connected to the first and the second input terminals. The first and the second AC switch units are electrically connected to the first and the second inductors for conducting input currents. The control unit is electrically connected to the first and the second AC switch units which may be turned on and off thereby to control the first and the second inductors which charge the input currents and discharge the input currents to the first and the second storing devices.

Abstract: A galvanic isolated DC-DC and DC-AC power conversion system is coupled to a plurality of DC sources which are derived from a combination of a plurality of single-phase and three-phase AC-DC converters. The DC-DC and DC-AC power conversion system in one embodiment is configured to provide mixed type outputs (mixed frequency, e.g. DC with 50 or 60 Hz, with 400 Hz; mixed voltage levels).

Abstract: A plurality of pickup coils 2A and 2B are provided, resonance capacitors 3A and 3B forming resonance circuits 4A and 4B resonating at the frequency of an inductive path 1 are respectively connected in series with the pickup coils 2A and 2B, and the resonance circuits 4A and 4B are connected in series. Further, the resonance circuits 4A and 4B are respectively provided with rectifier circuits 6A and 6B for rectifying voltages generated by the resonance circuits 4A and 4B. The rectifier circuits 6A and 6B are connected in parallel and feed power to a load 10. Moreover, a switch 5 is provided to switch a connected state and an open state between the resonance circuits 4A and 4B, and a voltage controller 11 is provided to control an output voltage applied to the load 10, by controlling the switch 5.

Abstract: The invention relates to a direct-current high-voltage generator that comprises: current unidirectional switches (74, 76); a driver unit (130) capable of controlling the switching operation from an on-state to an off-state of a switch (74) only when a switch connected in parallel is in the on-state

Abstract: An advantage of the present invention is to provide an adapter power supply which varies a link voltage of DC power serving an input power of a DC/DC converter according to variation of a load current estimated by measuring a secondary current using a lossless current measurement technique at a primary terminal of a transformer of the DC/DC converter and thus presuming a load current of an output power. An adapter power supply according to present invention may include an AC/DC converter converting a commercial AC power into a DC power; a DC/DC converter including a transformer composed of a primary terminal and a secondary terminal in order to output an output power by converting a link voltage of the DC power; and a controller presuming a load current of the output power through a primary current of the transformer and varying the link voltage of the DC power according to variation of the estimated load current.

Abstract: A collection and transmission system includes: a system direct current (DC) link configured for carrying power from a source to a grid; and alternating current (AC) to DC power converter modules coupled in series to the system DC link on a source side of the system DC link, each power converter module configured for being coupled to one or more sources on the source side, wherein each power converter module is configured to short circuit the DC terminals of the power converter module upon receipt of a respective command signal.

Abstract: A variable speed drive with a converter that is controllable to precharge a DC link is provided. The variable speed drive also includes an inverter. The converter converts a fixed line frequency, fixed line voltage AC power from an AC power source into DC power. The DC link filters the DC power from the converter. Finally, the inverter is connected in parallel with the DC link and converts the DC power from the DC link into a variable frequency, variable voltage AC power. The converter includes a plurality of pairs of power switches, wherein each pair of power switches includes a reverse blocking power switch arrangement connected in anti-parallel to another reverse blocking power switch arrangement. Alternatively, each pair of power switches includes a reverse blocking power switch connected in anti-parallel with a silicon carbide controlled rectifier.

Abstract: A discharge lamp ballast apparatus includes a DC/DC converter having a transformer T1 and a DC/DC converter having a transformer T2, which are connected in parallel; a control section 4 for controlling the output voltages of the DC/DC converters by varying their duties with shifting the operation phases of the transformers T1 and T2 of the DC/DC converters; and a voltage-multiplier rectifier circuit having diodes 7-9 and capacitors 10-12 for generating a high voltage used for starting a discharge lamp 22 by utilizing the potential difference between the output voltages of the transformers T1 and T2.

Abstract: A converter station for connecting an AC system to an HVDC transmission line. At least two converters are arranged in two separate converter valve halls. The station includes a separate control device configured to control of each converter and an auxiliary power source configured to provide auxiliary power for each converter. A separate overall control configured to control the overall operation conditions is arranged for each converter making each converter self supporting. The converter valve halls are separated by a substantial space.

Abstract: A converter controllable in regenerative running mode, which is a power converting apparatus capable of suppressing harmonics without increasing the size of a reactor, and reducing power loss and electromagnetic noise. A power converter is configured by directly connecting AC sides of single-phase sub-converters having a DC voltage lower than a DC voltage of a 3-phase main converter to AC input lines of individual phases thereof in series. The main converter is driven by one gate pulse per half recurring cycle and a voltage produced by each sub-converter at AC terminals thereof is controlled to match a difference between an AC power supply voltage and a voltage produced by the main converter at AC terminals thereof, whereby phase voltages of the power converter are generated as the sums of phase voltages of the individual converters.

Abstract: At least three power converters in a power distribution and power transmission system can be controlled as rectifiers or inverters and are connected together by a direct current network. A measuring direct current voltage and a measuring direct current are measured on each power converter and respectively, transmitted to the respective rectifier control and/or inverter control, and a rectifier desired direct power and/or inverter desired direct power is determined for each power converter.

Abstract: A system linking apparatus for generated electric power which may be made smaller and more efficient. The system linking apparatus is intended for connecting an electric power system to an output of a power generator through a linking inverter (PWM inverter). The system linking apparatus includes a magnetic energy regenerating circuit, a diode rectifier, and a capacitor. The magnetic energy regenerating circuit has a capacitor for condensing magnetic energy condensed in the power generator. The diode rectifier is connected with the magnetic energy regenerating circuit and operates to dc convert electric power generated by the power generator and output the converted power to the linking inverter. The capacitor is connected with the diode rectifier and operates to keep a dc output to the linking inverter at a predetermined voltage.

Abstract: A converter circuit for a wind power system for supplying a high-voltage direct voltage connection. The system includes a transformer with one primary winding per phase and a plurality of secondary windings per phase. Three of these secondary windings of different phase are connected to each rectifier cell. These rectifier cells are connected to one another by their inputs and outputs. The rectifier cells themselves each include one input rectifier and two series-connected upward converters, and the center tap of the secondary winding of the transformer is connected to the center points of the series circuit of the upward converters.

Abstract: A planar transformer power supply for an electrosurgical device to minimize stray capacitance comprising a step down/step-up isolation transformer and circuitry to limit the effects of a short circuit in the output of the planar transformer power supply on the input to the planar transformer power supply to enhance power capacity at a low load impedance as low as from about 5 ohms to about 10 ohms and to operate at resonance at the output of the planar transformer power supply.

Abstract: The present invention is a high voltage power converter having primary and secondary winding sets in a single planar layer stacked in increasing voltage and arranged without the use of a conductor. Substantially no AC stress exists between winding sets.

Abstract: A power conversion system for driving a load is provided. The power conversion system comprises a power transformer having at least one primary winding circuit and at least one secondary winding circuit, the primary winding circuit being electrically connectable to an AC power source. The system further comprises at least one power cell, each of the at least one power cell having a power cell input connected to a respective one of the at least one secondary winding circuit. Each power cell also has a single phase output connectable to the load. A power switching arrangement including at least one power switch is connected to the power cell input and a DC bus, and a switch controller is connected to the power switching arrangement and the power cell input. The power cell also has a PWM output stage having a plurality of PWM switches connected to the DC bus and the single phase output. A local modulation controller is connected to the PWM output stage.

Abstract: An AC to DC converter with harmonic suppression is provided. The harmonic suppression is provided by forcing an instantaneous current conflict between series connected rectifier bridges 54, 80, such that a voltage waveform at 6 times the AC supply frequency of the AC supply is automatically generated. This waveform is then injected via a injection circuit to give harmonic cancellation.

Abstract: A power supply circuit for a vacuum fluorescent display includes a boosting coil, input terminal, switching transistor, PWM control circuit, boosting circuit, first filament terminal, and second filament terminal. The boosting coil is provided in a current path to generate an induced voltage in accordance with a change in current flowing therein. The input terminal receives a DC voltage to be applied to one terminal of the boosting coil. The switching transistor is provided between the other terminal of the boosting coil and a ground line. The PWM control circuit periodically turns on/off the switching transistor. The boosting circuit generates a boosted voltage on the basis of an induced voltage generated at the other terminal of the boosting coil when the switching transistor is switched from ON to OFF. The first terminal is connected to the node between the other terminal of the boosting coil and the switching transistor.

Abstract: A full-wave rectifier, two resistors forming a voltage divider across the rectifier outputs and a capacitor in parallel with one of the resistors, provide an output across the capacitor that approximates the RMS equivalent of an input signal to the rectifier. The capacitance value may be selected to attenuate certain AC components without significantly affecting the accuracy of the RMS approximation. The shape of the input-signal-may be rectangular, trapezoidal, sinusoidal, triangular, random, constant DC, or a combination thereof, without affecting conversion accuracy. A DC voltage charge is maintained on the capacitor, which has been charged via the voltage divider, to a proportionally scaled equivalent of the RMS voltage of the input signal, through switched, non-symmetrical charge/discharge paths of the rectifier and the resistors.

Abstract: A power conversion system for driving a load is provided. The power conversion system comprises a power transformer having at least one primary winding circuit and at least one secondary winding circuit, the primary winding circuit being electrically connectable to an AC power source. The system further comprises at least one power cell, each of the at least one power cell having a power cell input connected to a respective one of the at least one secondary winding circuit. Each power cell also has a single phase output connectable to the load. A power switching arrangement including at least one power switch is connected to the power cell input and a DC bus, and a switch controller is connected to the power switching arrangement and the power cell input. The power cell also has a PWM output stage having a plurality of PWM switches connected to the DC bus and the single phase output. A local modulation controller is connected to the PWM output stage.

Abstract: A pulse generator produces a voltage pulse for an inductive or capacitive load, in particular for an electrostatic dust extractor, having an energy-storage capacitor which is connected in series with a controllable switch. The switch is self-opening at the zero crossing of the current flowing to the load, in a series of tuned circuits. The energy-storage capacitor is discharged to the load by closing and opening the controllable switch in a single discharging process during only one half oscillation period of the series tuned circuit.

Abstract: An electric energy converter comprises N transformers each including a primary winding and a secondary winding, a primary circuit connected to two input terminals on which the primary windings of the transformers are connected, a secondary circuit connected to two output terminals on which the secondary windings of the transformers are connected. Each primary and secondary circuit includes a set of switching devices connected to N primary windings and N secondary windings, where the converter further comprises a controller configured to control the switching devices of at least one of the primary or secondary circuits, the switching devices being connected to associate the N primary or secondary windings in a series and/or parallel arrangement by using the controller.

Abstract: A converter and rectifier circuit comprises a magnetic core, a first secondary winding, a second secondary winding, a third secondary winding, a first rectifier, a second rectifier and an output capacitor. The first, second and third secondary windings are wound around the magnetic core and are connected to each other. The first rectifier is connected to the first secondary winding and the second rectifier is connected to the second secondary winding. The output capacitor is connected to the first and second rectifiers and is connected in series with the third secondary winding.

Abstract: A power conversion system for driving a load is provided. The power conversion system comprises a power transformer having at least one primary winding circuit and at least one secondary winding circuit, the primary winding circuit being electrically connectable to an AC power source. The system further comprises at least one power cell, each of the at least one power cell having a power cell input connected to a respective one of the at least one secondary winding circuit. Each power cell also has a single phase output connectable to the load. An SCR arrangement including a gate drive and at least one SCR is connected to the power cell input and a DC bus. An SCR controller is connected to the SCR arrangement and the power cell input. The power cell also has a PWM output stage having a plurality of PWM switches connected to the DC bus and the single phase output. A local modulation controller is connected to the PWM output stage.

Abstract: A high frequency alternating current (AC) power distribution system includes a transmission medium. A system power supply is coupled to the transmission medium. A high frequency AC voltage regulator module (VRM) is coupled to the transmission medium via a contactless connector.

Abstract: A high frequency alternating current (AC) power distribution system includes a transmission medium. A system power supply is coupled to the transmission medium. A high frequency AC voltage regulator module (VRM) is coupled to the transmission medium via a contactless connector.

Abstract: A power feed for a submarine communications system includes a plurality of power converters each of which has at least 2 step-up transformer stages in which at least one of the windings of at least one of the transformer stages of at least one of the plurality of power converters is wound using a high voltage insulating wire to insulate against a high DC voltage appearing at an output of an adjacent power converter. The use of high voltage insulating wire removes the need for expensive custom built DC blocking capacitors.

Abstract: A bi-directional current circuit disposed between two power sources and a load. A first switch and a second switch each connect the load to one of the power sources respectively, whereby when the first switch is closed and the second switch is open current flows to the load in a first direction and when the first switch is open and the second switch is closed current flows to the load in a second direction opposite to the first direction.

Abstract: A high-voltage power supply circuit receives ac input, effects rectification and successive multiplication, and outputs a high dc voltage. The high-voltage power supply circuit includes a plurality of diode bridges connected to a secondary winding of a transformer, in series by way of capacitors, that effect full-wave rectification of an ac voltage outputted from the secondary winding. The high-voltage power supply circuit further includes a plurality of capacitors provided for each of the diode bridges that accumulate charges from the output voltage that has undergone full-wave rectification. Voltage that is a multiple of the maximum value of the ac voltage within the secondary winding and the number of stages of diode bridges (an integer multiple) is outputted at each of the connection points of the diode bridges.

Abstract: A power supply for producing a high voltage DC output. The power supply comprises a primary winding and a series of secondary stages each having secondary windings coupled to the primary winding through a magnetic circuit. Each secondary stage comprises a printed circuit board with the secondary windings formed as a series of independent coils or turns on the board substrate. The magnetic circuit comprises a series of segments which are separated by an insulating film to maintain each segment at the same potential as the associated printed circuit board. Each coil includes a rectifier element for converting the induced AC voltage into a DC voltage. The rectifier elements are connected in series and the printed circuit boards are coupled to produce a high level DC voltage output signal, for example, a minimum 200 kV output. To compensate for Magneto Motive Force (MMF) losses through the insulating film, the rectifier elements include a compensation capacitor.

Abstract: A miniaturized VHV transformer/rectifier for surface mounting on a screen-printed ceramic substrate. The primary winding and secondary windings are wound on separate limbs of the magnetic circuit which are sufficiently far apart to obtain a considerable leakage self-inductance. The secondary winding is formed by a stack of pancake coils each including a respective winding and the associated diode bridge along with their respective connections. The primary is cemented to a ceramic interface plate which is metallized on its rim to make a transfer plate coinciding with the surface of the receiving substrate.

Abstract: A rectifying circuit comprising first and second current doublers is disclosed. In some embodiments, the first and second current doublers are connected in series. In other embodiments, the current doublers are connected in parallel. In phase pairs of inductors can share a common core to reduce parts and ensure voltage balance.

Abstract: The present invention relates to a stack device comprising a stack of gate turnoff thyristors GTO, of freewheel diodes DRL, and of diodes D, for a semiconductor circuit, said stack device including power supply electrical connection terminals +HT and -HT, and an output terminal PM, together with electrical connection terminals Cs and Cc between said diodes Ds and Dc and a protection circuit P, wherein the geometrical organization of the wiring of said electrical connection terminals +HT, PM, and -HT is predetermined so as to enable the disposition of said thyristors GTO and of said freewheel diodes in said stack to be modified in order to obtain different electrical functions for the semiconductor circuit.

Abstract: Voltage transforming apparatus for receiving a system input voltage and then generating a system output voltage is disclosed herein, the voltage transforming apparatus including the following devices: Planar voltage transforming device, which is used to generate a module output voltage responding to the rate of change of the magnetic flux. The magnetic flux is induced by the system input voltage. The planar voltage transforming device including a first terminal having a first voltage and a second terminal having a second voltage. The first voltage is higher than the second voltage, and the output voltage of the planar voltage transforming device is responding to the difference between the first voltage and the second voltage. Coupling device for electrically coupling the planar voltage transforming device. In addition, the summation of the output voltage of the planar voltage transforming device is equal to the system output voltage.

Abstract: A high-voltage generator, includes a rectifier circuit (9) and a measuring resistor arrangement (8) for forming a measuring voltage (U.sub.M) which is proportional to the direct voltage (U.sub.DC), the measuring resistor arrangement (8) comprising at least one associated measuring resistor (R.sub.1, R.sub.2, R.sub.3) for each rectifier stage (31, 32, 33). In order to achieve a cost-saving and notably space-saving construction with adequate shielding of the measuring resistors (R.sub.1, R.sub.2, R.sub.3) from parts of the circuit (C.sub.4 . . . C.sub.9, 1, 2, 3) carrying the alternating voltage and from ground potential, the measuring resistors (R.sub.1, R.sub.2, R.sub.3) are integrated in the associated rectifier stages (31, 32, 33) and enclosed by a shield (11, 12, 13) which carries the direct voltage potential of the associated rectifier stage (31, 32, 33).

Abstract: An antiseismic static electrical converter installation comprises a valve assembly mounted on a platform, the platform being suspended at each of two opposite ends from a series of rods which are attached in a spaced-out relationship to a horizontal beam, the beam being mounted on the ground via rubber springs. During an earthquakes movement of the ground causes mainly lateral distortion of the rubber springs and elastic bending of the rods, and, since the natural resonant frequency of the suspension system is designed to be low and the rubber springs are deigned to have significant damping, a high degree of isolation is provided for the platform and the equipment mounted on it. During severe earthquakes, the rods are arranged to suffer a plastic bending which causes them to act like pendulums and changes the natural frequency of the suspension system to increase the damping and provide greater protection.

Abstract: A high-voltage generator for high d.c. voltages, particularly for feeding an x-ray tube has secondary windings applied by a printed technique on printed circuit boards that are held at a common printed circuit board, and which are interconnected thereto in printed technique with components for producing the high-voltage.

Abstract: An efficient transmitter is disclosed which comprises a direct current power source and an amplifier for amplifying a drive signal so as to produce a desired signal and a waste energy signal. An antenna is used to transmit the desired signal. A plurality of rectifier stages are connected in a cascade formation and convert the waste energy signal to direct current which is fed to the direct power source. Furthermore, power reflected when an amplifier load deviates from a perfect match in one amplifier stage is sent to a next amplifier stage in the cascade formation so that the reflected power is transferred to the direct power source.

Abstract: In a flyback transformer, mounting pins for mounting components protrude from each of projecting jaw sections of a bobbin of a high-voltage coil section. A holder for the anode lead is positioned and secured to the bobbin, and the mounting pin which serves as the anode end of the high-voltage coil section is electrically connected to electrically conductive rubber or a connection fitting provided at one end of the holder. The flyback transformer comprises a connection pin having a male-contact shape protruding from one of the jaw sections. The connection pin is inserted into and held by the electrically conductive rubber or the connection fitting provided for the holder and is electrically connected to the mounting pin serving as the anode end of the high-voltage coil section.

Abstract: A voltage lowering device includes at least one pair of forced commutation single-phase rectifiers connected to secondary windings of a main traction transformer. The power drawn from a direct current mains power supply passes through the main traction transformer and is recovered at a secondary winding by means of a forced commutation single-phase rectifier operating as a voltage increasing controlled rectifier. The other forced commutation single-phase rectifiers operate as synchronous voltage inverters. An asynchronous traction system supplied by a single-phase mains power supply includes a voltage lowering device as previously described.

Abstract: A power supply for producing a high DC output voltage. The power supply comprises a primary winding and a secondary winding coupled together by a magnetic circuit. The secondary winding comprises a series of independent coils or turns. Each coil includes a rectifier element for converting the induced AC voltage into a DC voltage. The rectifier elements are connected in series to produce a high level DC voltage output signal, for example, a minimum 50 kV output. The secondary coils have a turns ratio such that the induced voltage is less than the Paschen minimum voltage for the gaseous medium surrounding the secondary coils. The power supply may be fabricated using surface mount technology or as a printed circuit board where the secondary coils are formed as tracks on the substrate.

Abstract: A circuit for providing from a low voltage input, a high voltage output to a segmented electroactive actuator, wherein each of the segments function as a filter capacitor and a load, comprising a transformer, an input switching means, input coupling means and voltage converter means. The transformer has a primary and a plurality of secondary windings, and the input coupling means couples the low voltage input to the primary winding. The input switching means is coupled to the primary winding for permitting current to flow through the primary winding. The voltage converter means is coupled to each of the secondary windings and comprises output coupling means for coupling to said filter capacitors and when so coupled, the voltage converter means provides a plurality of output voltages in series and wherein each output voltage is generated across each of the filter capacitors of the segments.