Abstract: According to one embodiment, a note PC has a disk drive connected to a system board via a connector. A power receive coil is attached to the disk drive. Power produced by the power receive coil as a result of excitation of a power feed coil is fed to a power supply control circuit via an unused pin of the connector.
Abstract: A transformer for converting 3 phase AC to 9 phase AC power is provided. The transformer includes first, second and third coils, each coil having a plurality of serial windings coupled together to form a polygon. The transformer further includes first, second and third input terminals each linked to a respective winding of the first, second and third coils. The input terminals are configured to receive a first, second and third phases of input AC power and at least one selected input terminal of the first, second and third input terminals is adjustable to alter a number of turns of the respective winding of the corresponding first, second or third coil on either side of the selected input terminal. The transformer further includes first through ninth output terminals linkable to first through ninth output power lines.
Abstract: One embodiment of an improved energy conversion and storage system uses pre-charge-enabled energy-converting variable capacitors that can be substantially encapsulated in asphalt roads or streets. Another embodiment can be substantially encapsulated in concrete walls or rooftops. Radiant solar energy does work on temperature-sensitive capacitors. Temperature change, in one embodiment, modifies the capacitance of the previously pre-charged capacitor, thereby converting solar energy into increased electrical energy available for practical use, without needing parabolic reflectors and without needing any moving parts. Other embodiments are described and shown.
Abstract: Switches perform switching at a timing when a first phase voltage and a second phase voltage outputted from a three-phase voltage source have a phase difference of 90°. Then, a three-phase/two-phase conversion inductor outputs a pair of AC currents, and a rectification and a single-phase pulse-width modulation are performed on each of AC currents. Modulated currents obtained as a result of the rectification and the single-phase pulse-width modulation are synthesized, to generate an output current, which is supplied to a circuit in which a capacitor and a load are connected in parallel with each other.
Abstract: A method for operating a matrix converter in which m phases of a generator generating alternating voltage with n phases of a load are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix. An improvement of the spectrum of the generated alternating voltage, i.e. of the alternating voltage with n phases is achieved by means of voltages which are added on-line to the converter output or input.
Abstract: A method for the calculation of an output spectrum of a matrix converter in which m phases of a generator as an input are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix with n (n<m) phases of a load as an output. An assessment of the spectrum to be used, for example, for compensation of harmonic distortions of the output spectrum can be obtained by calculating the electromotive force spectrum based on at least one of the connectivity of the phases, on the phase relationship between input and output, and on the instants when commutations of the switches are initiated and on the instants when commutations of the switches are completed.
Abstract: An irregular polygon connection of a three-phase autotransformer using only five windings per phase provides a source of nine-phase power suitable for an 18-pulse AC to DC power converter. The windings are connected in a manner to limit the amount of third harmonic current circulating in them. When the autotransformer is used to power a nine-phase AC to DC converter its kVA rating is typically less than 50% of the DC load kW. An additional tap on one of the five windings allows a wide range of AC output voltages to be obtained. Voltages greater than, less than, or equal to the AC input voltage can be obtained. Other multi-phase outputs are feasible. Additional isolated windings can provide means for the invention to operate as an efficient double-wound transformer.
Abstract: A novel architecture of high-power four-quadrant hybrid power modules based on high-current trench gate IGBTs and arrays of low-current wide-bandgap diodes is conceived. The distributed physical layout of high power density wide-bandgap devices improves the cooling inside a fully-sealed module case, thus avoiding excessive internal heat flux build up and high PN junction temperature, and benefiting the converter's reliability and efficiency. The design of multiple-in-one hybrid integrated AC-switch module at high power ratings is enabled by using hybrid AC switch cells and aluminum nitride substrate structure.
March 27, 2003
Date of Patent:
April 25, 2006
The Boeing Company
Jie Chang, Xiukuan Jing, Anhua Wang, Jiajia Zhang
Abstract: A matrix converter for transforming electrical energy between at least one voltage source, in particular a power supply network, and at least one current source, in particular a load, said converter including a matrix of switches connecting said voltage sources to said current sources, wherein each of said switches has two terminals disposed in respective distinct parallel planes and a photoconductive diamond substrate interposed between said two terminals of the switch, each switch being controlled by means of a light source irradiating the diamond substrate interposed between the two terminals.
January 13, 2003
Date of Patent:
August 24, 2004
Emmanuel Dutarde, Christophe Beuille, Fabrice Breit, Henri Schneider
Abstract: An energy transfer multiplexer to control the flow of power or energy between an energy source and an energy load comprising a bi-directional inverter including a first bank or plurality of switches or first plurality of energy transfer control points and a second bank or plurality of switches or second plurality of energy transfer control points operatively coupled by a series resonant transfer link to selectively control the direction of power or energy flow between the first and second bank or plurality of switches or the first and second plurality of energy transfer control points.
Abstract: In a method for operating a matrix converter (10) in which m phases (G1, . . . ,G6) of a source (11) delivering an alternating voltage are alternatingly connected with n phases (L1, . . . ,L3) of a load (12) via a multiple number of controllable bi-directional switches (14) arranged in an (m×n) matrix, an increased performance at decreased expenditure becomes possible in that switching over from a first phase (G1) of the source (11) to a second phase (G1) of the source (11) only takes place if the condition
is met, where Ik and Vk are the current and the voltage of the first phase (G1), Vl is the voltage of the second phase (G1) and in each instance Kijkl is a characteristic constant for the mutual inductance between the phases (G1, . . . ,G6) of the source (11) and the inductance of the load (12).
Abstract: A high power AC--AC converter having integrated adaptive commutation control and a new modularity design based on standard per-phase floating AC power-building modules. The per-phase floating AC power building modules designed with high voltage throughput and optimal partitioning differential output architecture which is suitable for multi-phase multi-module high power electronic systems. Now integrated and smart AC power switch modules are provided to reduce the gate control complexity, minimize circuit connection terminals and simplify power bus structure.
Abstract: An N-phase power converter uses a ring oscillator to generate a series of switching signals having substantially equally distributed phase relationships with respect to one another. The ring oscillator is formed from an alternating string of inverters and RC networks with the voltage over each capacitor of each RC network provided to a phase comparator. The phase comparators shape a saw-tooth waveform present over each capacitor into a pulse-width-modulated switching signal that drive switches which alternately charge and discharge inductors. One terminal of each inductor is coupled to common node at which the converter output voltage is provided. A feedback unit generates a feedback signal is used to vary the pulse width of the switching signals.
Abstract: A demodulator for the demodulation of polyphase, in particular triphase, voltages interfering among themselves and constituting a system of polyphase pseudo-sinusoidal voltages modulated in amplitude to a pulsation .epsilon., to obtain a system of polyphase voltages with a pulsation .epsilon.. The demodulator comprises a polyphase rotating machine including three 3-phase armatures connected through a common yoke made up of a low magnetic loss material, and fed by three systems of polyphase pseudo-sinusoidal voltages modulated in amplitude to a pulsation .epsilon.. A rotor freely rotates within the armature and includes three magnetic circuits connected through a common magnetic axle with the flux carrying parts of the rotor being a low loss magnetic material. Three static coils are disposed concentric with the axis of the magnetic rotor axle, and three systems of polyphase voltages of pulsation .epsilon. are collected at the respective terminals of the coils.