6933results about How to "Increase output power" patented technology

A self-powered medical device, for example a pacemaker uses the variations of blood pressure inside the heart or a major artery to create a mechanical resonance in an electromagnetic or piezoelectric generator. The resonance extends the time power is generated during the cardiac cycle. The pressure variations compress a bellows carrying the resonant generator. The inside of the bellows may be evacuated to a partial or full vacuum, and a spring restores the bellows to the desired equilibrium point, acting against the blood pressure. The current pulses are stored in a capacitor. Eliminating the battery allows dramatic miniaturization of the medical device to the point it can be implanted at the point of desired stimulation via a catheter.

A high external quantum efficiency is stably secured in a semiconductor light emitting device. At least one recess and / or protruding portion is created on the surface portion of a substrate for scattering or diffracting light generated in a light emitting region. The recess and / or protruding portion has a shape that prevents crystal defects from occurring in semiconductor layers.

This invention relates to a front electrode / contact for use in an electronic device such as a photovoltaic device. In certain example embodiments, the front electrode of a photovoltaic device or the like includes a multilayer coating including at least one transparent conductive oxide (TCO) layer (e.g., of or including a material such as tin oxide, ITO, zinc oxide, or the like) and / or at least one conductive substantially metallic IR reflecting layer (e.g., based on silver, gold, or the like). In certain example instances, the multilayer front electrode coating may include one or more conductive metal(s) oxide layer(s) and one or more conductive substantially metallic IR reflecting layer(s) in order to provide for reduced visible light reflection, increased conductivity, cheaper manufacturability, and / or increased infrared (IR) reflection capability. At least one of the surfaces of the front glass substrate may be textured in certain example embodiments of this invention.

A solar cell array control device has a plurality of solar cell modules, a bidirectional DC converter, at least a voltage sensor and a control unit. The bidirectional DC converter corresponds to and is electrically connected to the solar cell modules to connect these solar cell modules in series to form a solar cell array. The voltage sensor is electrically connected to the solar cell modules, and can generate an abnormal voltage when detecting that one of the solar cell modules is abnormal. The control unit is electrically connected to the voltage sensor and the bidirectional DC converter, and outputs a pulse width modulation signal by detecting the abnormal voltage to control the bidirectional DC converter for compensating the conversion current and thus enhancing the output power of this solar cell module.

An EUV photon source includes a plasma chamber filled with a gas mixture, multiple electrodes within the plasma chamber defining a plasma region and a central axis, a power supply circuit connected to the electrodes for delivering a main pulse to the electrodes for energizing the plasma around the central axis to produce an EUV beam output along the central axis, and a preionizer for ionizing the gas mixture in preparing to form a dense plasma around the central axis upon application of the main pulse from the power supply circuit to the electrodes. The EUV source preferably includes an ionizing unit and precipitator for collecting contaminant particulates from the output beam path. A set of baffles may be disposed along the beam path outside of the pinch region to diffuse gaseous and contaminant particulate flow emanating from the pinch region and to absorb or reflect acoustic waves emanating from the pinch region away from the pinch region. A clipping aperture, preferably formed of ceramic and / or Al2O3, for at least partially defining an acceptance angle of the EUV beam. The power supply circuit may generates the main pulse and a relatively low energy prepulse for homogenizing the preionized plasma prior to the main pulse. A multi-layer EUV mirror is preferably disposed opposite a beam output side of the pinch region for reflecting radiation along the central axis for output along the beam path of the EUV beam. The EUV mirror preferably has a curved contour for substantially collimating or focusing the reflected radiation. In particular, the EUV mirror may preferably have a hyperbolic contour.

A power amplifier assembly has a first power amplifier with a first input conditioning circuit. At least first and second amplifiers are in parallel with each other and having inputs and outputs. An input signal is coupled to the inputs of the first and second amplifiers. A first multi-input power combiner is provided. The outputs of the at least first and second parallel amplifiers are combined by the first multi-input power combiner to add signals of the outputs constructively. A second power amplifier has a first input conditioning circuit. At least first and second amplifiers are in parallel with each other and having inputs and outputs. An input signal is coupled to the inputs of the first and second amplifiers. A second multi-input power combiner is provided. The outputs of the at least first and second parallel amplifiers are combined by the second multi-input power combiner to add signals of the outputs constructively.

This invention relates to a front electrode / contact for use in an electronic device such as a photovoltaic device. In certain example embodiments, the front electrode of a photovoltaic device or the like includes a multilayer coating including at least one transparent conductive oxide (TCO) layer (e.g., of or including a material such as tin oxide, ITO, zinc oxide, or the like) and / or at least one conductive substantially metallic IR reflecting layer (e.g., based on silver, gold, or the like). In certain example instances, the multilayer front electrode coating may include one or more conductive metal(s) oxide layer(s) and / or one or more conductive substantially metallic IR reflecting layer(s) in order to provide for reduced visible light reflection, increased conductivity, cheaper manufacturability, and / or increased infrared (IR) reflection capability.

A fully integrated, low cost, amplified electro-acoustic loudspeaker is disclosed in which an amplifier circuit (30, 130, 230, 330, 930, 1030), radio-frequency receiver amplifier circuit (430, 530), optical receiver amplifier circuit (630, 730), or network based amplifier circuit (830) is directly mounted on the loudspeaker's magnetic assembly (105, 505, 705, 805), contained within the loudspeaker's moving assembly (20, 29, 629, 42, 45, 50, 65), or a combination thereof. The amplified loudspeaker's magnetic assembly (5, 105, 405, 505, 705, 805, 905, 1005) is utilized as an electro-magnetic interference shield and / or a heat dissipating element for the attached electronic circuitry. In selected embodiments of the amplified loudspeaker system, the former (42) containing voice coil (45) is additionally utilized for convection cooling of the amplifier circuit (30, 230) or receiver / amplifier circuit combination (430, 630).

The invention discloses a power supply semi-trailer of electric drive fracturing equipment. The combination manner of a gas turbine engine, a power generator and a rectification unit is adopted, the power generator directly transmits the winding form and voltages needed by a rectification unit, conventional rectification transformer equipment is omitted, the rectification unit is connected with inversion units through common direct current buses, the common direct current buses can drive the multiple inversion units separately, and wiring of power supply circuits is reduced. The high-voltage inversion units are arranged on a gooseneck of the electric drive semi-trailer, and the space arrangement of the equipment is optimized. The whole power supply equipment is more compact in structure, small in occupied area and simple in wiring.

Provided is a secondary battery of an assemble-type structure, comprising: a cell body including an electrode assembly of cathode / separator / anode sealed therein; and a cap assembly including a protection circuit electrically connected to the cell body so as to control overcharge, overdischarge and overcurrent of the battery and a cap housing covering an upper part of the battery, and being detachably coupled to the cell body. In accordance with the present invention, since the cap assembly including the protection circuit, cap housing and the like is assembled detachably from the cell body and electrically connected to and also can be physically firmly fixed to one another, provided are effects capable of greatly reducing the manufacturing process steps of the battery, and solving all the problems associated with use of battery cases and insert injection molding. Therefore, the present invention can reduce battery production costs and rejection rate, facilitate greater ease of re-working upon occurrence of rejection in particular components and realize more efficient automation of the battery manufacturing process.

An integral method for realizing parallel generation and network reactive power compensation at the same time is based on the transient reactive power theory applying park transfer to transform a three phase inverter output current to a rotation dq coordinate to realize separation of active current and reactive current to convert the DC current of the photovoltaic to AC current by controlling the currents and directions carry out reactive power compensation to the local network. When a photovoltaic battery has enough energy to output, it realizes parallel generation and reactive compensation at the same time, when it stops the output, the inverter compensates the network independently.

A light emitting device, which can be efficiently manufactured and maintain a stable light emitting property for a long period, is provided. The light emitting device comprises a first resin forming body including a periphery that forms a recess to house a light emitting element and a bottom that forms a bottom portion of the recess, and a second resin forming body which covers the light emitting element. The first resin forming body is composed of a thermosetting epoxy resin composite whose essential component is an epoxy resin. The bottom covers surfaces of lead frames excluding mounting regions of the light emitting element and wires. A thickness of the bottom is formed thinner than a thickness from the surface of the lead frames to a leading end of the light emitting element.

Disclosed is an amplifying optical fiber having a central core and an optical cladding surrounding the central core. The central core is based on a silica matrix that includes nanoparticles, which are composed of a matrix material that includes doping ions of at least one rare earth element. The amplifying optical fiber can be employed, for example, in an optical amplifier and an optical laser.

An object of the present invention is to provide a light emitting device that has high output power and long service life where a package is suppressed from discoloring due to heat generation. The light emitting device 1 of the present invention contains a light emitting element 10, a package 40 formed of a thermosetting resin, the package having a recess 43 wherein the light emitting element 10 is mounted, a first lead electrode 20 which is exposed at the bottom of the recess 43 of the package 40 and whereon the light emitting element 10 is mounted, and a second lead electrode 30 which is exposed at the bottom of the recess 43 of the package 40 and is electrically connected to the light emitting element 10. The light emitting element 10 is bonded to the first lead electrode 20 through a eutectic layer 70, and at least a surface of the first electrode 20 is coated with an Ag film 22, a thickness of the Ag film 22 being in the range from 0.5 μm to 20 μm.

This invention is related to LED Light Extraction for optoelectronic applications. More particularly the invention relates to (Al, Ga, In)N combined with optimized optics and phosphor layer for highly efficient (Al, Ga, In)N based light emitting diodes applications, and its fabrication method. A further extension is the general combination of a shaped high refractive index light extraction material combined with a shaped optical element.

Disclosed herein is an inner rotor type permanent magnet excited transverse flux motor, in which a laminated structure in an axial direction or in a radial shape is applied to a stator iron core so as to employ a small amount of permanent magnets compared with a conventional outer rotor type permanent magnet excited transverse flux motor, thus providing high output power, increasing the efficiency of power generation, and reducing noise and vibration.For this, the present invention provides an inner rotor type permanent magnetic excited transverse flux motor comprising: a stator including a stator powdered iron core press-molded using a mold, a stator laminated iron core laminated on upper and lower layer portions of the circumference of the stator powdered iron core at regular intervals, and a stator winding which winds the segmented stator powdered iron core in which a current flows is wound between the intervals; and a rotor in which a rotor permanent magnet and a rotor powdered iron core are arranged alternately to face each other.

Provided is a power amplifier which fits to a deep-submicron technology in radio frequency wireless communication. The power amplifier includes a cascode including a first transistor which receives and amplifies an input signal, and a second transistor which is connected to the first transistor in series and operated by a DC bias voltage; a third transistor which is connected between the cascode and an output end, operated by a dynamic gate bias and outputting a signal; and a voltage divider which includes first and second capacitors that are connected between the output end, i.e. a drain of the third transistor, and a ground in series, and provides the dynamic bias to a gate of the third transistor.

The invention provides a fracturing pump truck driven by a turbine engine, which comprises an engine, a fracturing pump, pipelines and the like. A traditional large and heavy diesel engine is replaced by the turbine engine which is small in size, light in weight and high in power, the total output power of a single fracturing pump truck can be more than 4000hp under the requirements of limited integral vehicle weight. The fracturing pump truck driven by one turbine engine is equivalent to the fracturing pump truck driven by two traditional diesel engines, so that output power of unit operating area is improved, more labor and materials can be saved in transport and specific constriction operations of fracturing equipment, land requisition and operating area are reduced, and construction efficiency is improved. Further, the turbine engine can also use various gaseous and liquid fuels and is especially suitable for shale gas exploitation.

A compact mid-IR laser device utilizes an external cavity to tune the laser. The external cavity may employ a Littrow or Littman cavity arrangement. In the Littrow cavity arrangement, a filter, such as a grating, is rotated to provide wavelength gain medium selectivity. In the Littman cavity arrangement, a reflector is rotated to provide tuning. A quantum cascade laser gain medium provides mid-IR frequencies suitable for use in molecular detection by signature absorption spectra. The compact nature of the device is obtained owing to an efficient heat transfer structure, the use of a small diameter aspheric lens for both the output lens and the external cavity lens and a monolithic assembly structure to hold the optical elements in a fixed position relative to one another. The compact housing size may be approximately 20 cm×20 cm×20 cm or less. Efficient heat transfer is achieved using a thermoelectric cooler TEC combined with a high thermal conductivity heat spreader onto which the quantum cascade laser gain medium is thermally coupled. The heat spreader not only serves to dissipate heat and conduct same to the TEC, but also serves as an optical platform to secure the optical elements within the housing in a fixed relationship relative on one another. The small diameter aspheric output and external cavity lens each may have a diameter of 10 mm or less and each lens is positioned to provided a collimated beam output from the quantum cascade laser gain medium. The housing is hermetically sealed to provide a rugged, light weight portable MIR laser source.

A high intensity solid-state lighting apparatus is disclosed for the application of navigational aids. In various embodiments based on the approach of chip-on-board packaged semiconductor light emitting elements, unidirectional, bidirectional as well as omni-directional navigational lights are configured to meet high luminous intensity requirements. They also provide additional utilities for generating multiple colors and flash patterns with the same light unit for lighting reconfiguration as well as creating new means of signaling. Another purpose of the current invention is to provide a light source which will not cause vertigo effects.

The invention provides a transmission device having adaptive digital predistortion, which has a transmission path and a feedback path. The transmission path contains a predistortion unit which takes a derived control signal (LS) and baseband signals applied to the input side as a basis for calculating the address of a predistortion coefficient (KOEFF1) stored in a memory and logically combines this predistortion coefficient with the applied baseband signals in a complex multiplication unit. The use of complex coefficients and of the complex multipliers allows compensation both for AM / AM distortion and for AM / PM distortion in an amplifier device connected downstream of the predistortion unit. Usefully, the feedback path of the transmission device with digital adaptive predistortion can also be implemented using the reception device in a transceiver.

PCT No. PCT / EP98 / 02965 Sec. 371 Date Jan. 14, 1999 Sec. 102(e) Date Jan. 14, 1999 PCT Filed May 20, 1998 PCT Pub. No. WO98 / 52879 PCT Pub. Date Nov. 26, 1998An object of the present invention is to provide a synthetic silica glass optical material which exhibits excellent transmittance as well as durability for high output power vacuum ultraviolet rays, being emitted from, for example, ArF excimer lasers and Xe2 excimer lamps, and to provide a method for producing the same. A synthetic silica glass optical material for high output power vacuum ultraviolet rays made from ultra high purity synthetic silica glass for use in the wavelength region of from 165 to 195 nm, containing OH groups at a concentration of from 5 to 300 wtppm with a fluctuation width in OH group concentration ( DELTA OH / cm) of 10 wtppm or less, containing hydrogen molecules at a concentration of from 1x1017 to 1x1019 molecule / cm3 with a fluctuation width in hydrogen molecule concentration ( DELTA H2 / cm) of 1x1017 molecule / cm3 or lower, and containing chlorine at a concentration of 50 wtppm or lower. Also claimed is a method for producing the same.

A low-noise laser diode module comprises a laser diode for emitting light with a wavelength in the range from UV to IR, a drive circuit for injecting electrical current into said diode, and an automatic power control circuit for monitoring and adjusting laser output power using front-facet photodiode external to the laser assembly and a feedback loop. Said drive circuit produces injection current modulated by an RF signal with variable degrees, depending on the wavelength to be stabilized, the desired spectral bandwidths of the laser output, and / or other applications. Said RF signal can be a sine wave, a distorted sine wave, a rectified sine wave, a non-sine wave, a series of narrow pulses, or repetitive shunt. The present invention encompasses a method for producing stable, broadband, and low-coherent laser. The present invention also encompasses a method for producing stable narrowband or single longitudinal mode laser. The present invention further encompasses a compact light source applicable to DPSS lasers, fiber lasers, optical parametric oscillators, low-speckle laser display systems, and seeders, with or without nonlinear frequency conversion processes.

An avalanche photo-detector (APD) is disclosed, which can reduce device capacitance, operating voltage, carrier transport time and dark current as well as increasing response speed and output power. Thus, an avalanche photo-detector (APD) with high saturation power, high gain-bandwidth product, low noise, fast response, low dark current is achieved. The APD includes an absorption layer with graded doping for converting an incident light into carriers, an undoped multiplication layer for multiplying current by means of receiving carriers, a doped field buffer layer sandwiched between the absorption layer and the multiplication layer for concentrating an electric field in the multiplication layer when a bias voltage is applied, and an undoped drift layer sandwiched between the absorption layer and the field buffer layer for capacitance reduction.

A ballast includes a voltage converter providing a DC power from a DC source voltage. The converter includes a switching element and an energy storing element having an inductance. The switching element is controlled to operate for repetitively switching the DC source voltage in order to store energy into the energy storing element. A power converter is included in the ballast to receive the energy and convert it into an operating power for driving the discharge lamp. A controller provides a command value and turns on and off the switching element for variable periods, respectively in accordance with the command value for generating a necessary power to the lamp. The controller gives a variable OFF-period and a variable ON-period to the switching element. The controller gives a minimum OFF-end limit and a forced maximum OFF-end limit for terminating the OFF-period, and also gives a minimum ON-end limit and a forced maximum ON-end limit for terminating the variable ON-period. The minimum OFF-end limit is defined at a timing when a secondary current flowing from the inductance decreases to zero, while the minimum ON-end limit is defined at a timing when a primary current flowing through the switching element reaches the command value. The controller terminates the OFF-period at the minimum OFF-end limit or at the forced maximum OFF-end limit, whichever comes earlier, and terminates the ON-period at the minimum ON-end limit or at said forced maximum ON-end limit, whichever comes earlier.

This invention is related to LED Light Extraction for optoelectronic applications. More particularly the invention relates to (Al, Ga, In)N combined with optimized optics and phosphor layer for highly efficient (Al, Ga, In)N based light emitting diodes applications, and its fabrication method. A further extension is the general combination of a shaped high refractive index light extraction material combined with a shaped optical element.