520 results about "Electrical efficiency" patented technology

A power converter for converting energy from a green power unit as e.g. a solar cell into energy fed into the commercial grid is described. The object is to provide a versatile modularized power converter with eased access to control of the power switches. Another object is to improve the electrical efficiency. This is achieved by using an independent controller on a DC/DC module and an independent controller on a DC/AC module, whereby the the two independent controllers communicate with each other and the outside world by means of a communication bus. Further, the DC/DC module of the power converter comprises a transformer which transfers energy from the DC/DC module to the DC/AC module. This design enables independent control of the modules and eases controllability of the power switches in order to suppress retroaction from pulsations generated on the mains when supplying energy to a single phase grid. Hereby the electrical efficiency of the power converter is increased. Also, an active snubber circuit is described which further increase the efficiency.

A substrate for a semiconductor device and a manufacturing thereof, and a semiconductor device using the same and a manufacturing method thereof are disclosed. For example, in the substrate according to the present invention, a core is eliminated, so that the substrate has a very thin thickness, as well, the length of electrically conductive patterns becomes shorter, whereby the electrical efficiency thereof is improved. Moreover, since a carrier having a stiffness of a predetermined strength is bonded on the substrate, it can prevent a warpage phenomenon during the manufacturing process of the semiconductor device. Furthermore, the carrier is removed from the substrate, whereby a solder ball fusing process or an electrical connecting process of the semiconductor die can be easily performed.

An AC driven LED light string assembly is provided possessing reduced harmonic distortion and improved electrical efficiency when one or more series blocks of LED lamps is employed. In one embodiment, there is provided an LED light string employing a capacitor coupled in parallel across the light string AC input, or end connector terminals. According to another embodiment, LED light strings are to be manufactured with a substantially equal number of light strings produced with all LEDs in forward bias (anode first) and reverse bias (cathode first). This allows true randomness when large numbers of single series block LED light strings are connected in an end-to-end manner. It is possible to apply this concept to single LED lamps having two chips where one chip is powered in reverse bias to the second chip; thereby providing self-canceling harmonics within the single LED lamp.

The invention relates to anode exhaust gas treatment methods for solid oxide fuel cell power plants with CO2 capture, in which the unreacted fuel in the anode exhaust (301) is recovered and recycled, while the resulting exhaust stream (303) consists of highly concentrated CO2. It is essential to the invention that the anode fuel gas (102) and the cathode air (205) are kept separate throughout the solid oxide fuel cell stacks (1). A gas turbine (202,207) is included on the air side in order to maximise the electrical efficiency.

An integrated thermal apparatus for improved electronic device performance has an energy storage device coupled with a thermoelectric management device for managing thermal energy generated by the electronic device. The thermoelectric management device can include a semiconductor thermoelectric device and phase change material, which can be integrated into a foam aluminum structure. The energy storage device can be a nanometallic device. The electrical load electrical efficiency is improved by co-locating it with thermoelectric management device directly on a composite substrate foundation to provide enhanced waste heat conversion to electrical energy. The apparatus manages the thermal and power issues at the substrate level in close proximity to the electrical load and incorporates the needed thermal mass into the support structure by way of a phase change material.

A holiday light with LED has a seat connected to a lamp, a lens and a cover in sequence. The seat has lower recesses. The lamp has an LED and two groups of wires and each group of wires have three wires. The cover has upper recesses. The wires are clamped between corresponding lower recesses of the seat and the upper recesses of the cover and the LED is mounted between the seat, the lens and the cover. The holiday light with LED is improved electrical efficiency and provides various lighting effects and is more reliable than an incandescent bulb.

The invention relates to an LED constant current driving circuit which comprises a rectifying circuit (100), a decompression voltage stabilization circuit (200) connecting with a DC output end of the rectifying circuit (100), a constant current circuit (300) including a control module U2, a control circuit (400) using software to change and control the current output by the constant current circuit (300), and an LED load circuit (500); wherein the control circuit (400) comprises a singlechip U1 and a control switch S2; a current detection end of the control module U2 in the constant current circuit (300) is connected with a load, and a regulation end thereof is connected with the control circuit (400), so that constant current control can be provided for an LED. When differential pressure between input and output of the LED constant current driving circuit is high, stable and reliable current still can be output, and the output current can be controlled by the software, so that the LED constant current driving circuit is applicable to multiple application requirements, and has the advantages of simple circuit, higher electrical efficiency, and being beneficial to energy conservation and environmental protection.

The present invention discloses a wireless battery charger of moving coil type that moves a table (15) that mounts a transmitter coil (14) freely in an X-axis direction and in a Y-axis direction having a fixing guide (21), an X-axis slider (6) a Y-axis slider (9), a motor (10), a power transfer means (11) that transfers power of the motor to one of the X-axis slider or the Y-axis slider, a power distribution part (12) that distributes the power of the motor transferred to one slider to another slider, and the table (15) that mounts the transmitter coil (14) wherein the transmitter coil mounted on the table can move freely by transferring the power of the motor to both the one slider and the another slider. Therefore a structure of the battery charger can be simplified, the battery charger can be cheaper and electrical efficiency can be improved.

A propulsion system for a fuel cell hybrid vehicle that includes a fuel cell system and an EESS, where the propulsion system employs an algorithm for increasing system efficiency. A power limit value is defined as the maximum system efficiency times the charge/discharge efficiency of the EESS. If the vehicle operator requests a power greater than the power limit value, then the fuel cell system will preferably provide the power, and if the power request from the vehicle operator is less than the power limit value, then the EESS will preferably provide the power. The algorithm also considers changing operation conditions and parameters that impact the fuel cell system efficiency and the electric energy storage system efficiency, such as the state of charge of the EESS and regenerative braking.

The invention discloses an acid etchant online electrolytic recycling device and an acid etchant online electrolytic regenerating method. The method comprises the following steps of: introducing acid etchant into an electrolytic tank and an adjusting tank; introducing the acid etchant into an etching machine through the adjusting tank; introducing waste etchant into catholyte and anolyte storage tanks; electrolyzing in a cathode chamber of the electrolytic tank to obtain catholyte and metal copper which is attached to a cathode pipe; electrolyzing in an anode chamber to obtain anolyte; supplementing electrolyte in the cathode and the anode chambers of the electrolytic tank respectively through catholyte and anolyte storage tanks; and after exhausting the acid etchant in the adjusting tank, mixing catholyte and anolyte obtained through the electrolysis in the electrolytic tank, leading the mixed catholyte and anolyte to enter the adjusting tank for being continuously used for the work of an etching machine, taking out the cathode pipe and stripping electrolytic copper. According to the invention, acid etchant online electrolytic recycling device can achieve a butt-joint online working state with the etching machine to form closed loop circulation, so that the etchant cost is greatly reduced and the metal copper can be recycled, wherein the regenerated electrical efficiency of copper ions is larger than or equal to 98 percent, the efficiency in recycling copper through cathodic deposition is larger than or equal to 95 percent and the copper purity is higher than 99 percent.

A system and apparatus for enhancing convection in electrolytes for improved electrodeposition of copper and other non ferrous metals in industrial electrolytic cells at given a current density providing exact geometric locations of the electrolyte jet infeed supply system used to impart forced convection in the electrolyte, the gas bubbling system for low pressure/low volume convection enhancement, and the electrode bottom and lateral distancing system, and range of operational parameters, for correct electrolyte flow and air bubbling flow improving cell productivity, quality of metal plates with increased electrical efficiency for its industrial application. The system and apparatus can also be used in industrial cells with same optimal results but at increased current densities, provided sufficient suitable electrolyte and additional electric power is available.

A method for producing components for injection moulding comprising a body made of thermally conducting material with expansion coefficient matching that of the insulating layers and provided with a passage for the material to be injected. At least one strip of electrically conducting material with high change of resistance with temperature, forming a heating resistor or inductor is applied on a electrically insulating base layer previously directly applied on the body. At least one final insulating layer with low thermal emissivity is then applied to optimise electrical efficiency. The method utilises thermal spray techniques and can be applied also for production of other heating equipment.

A stator and rotor for a DC brushless ceiling fan motor includes an integrated design of the stator and rotor to form an integrated stator, the integrated stator is made of a permeable material and is formed by means of a secondary production process. The DC brushless ceiling fan motor further includes an electrical controlling circuit that comprises a computer microprocessor, a power supply, a frequency converter, a phase detector and a remote control device or a manual control switch with the purpose of controlling the speed and the orientation of the motor, and thus achieving the result of low working temperature and high electrical efficiency.

A hydrogen generating material reacts with water to produce hydrogen and includes at least one metal material selected from the group consisting of aluminum, magnesium, and their alloys. The metal material includes particles with a particle size of 60 μm or less in a proportion of 80 wt % or more. The hydrogen generating material can produce hydrogen easily and efficiently at low temperatures. A hydrogen generator can be made portable by using the hydrogen generating material. Moreover, the use of the hydrogen generating material as a hydrogen fuel source can reduce the size of a fuel cell and improve the electrical efficiency.

Disclosed in the invention is a current transformer resonance power taking-based direct-current source. The direct-current source comprises a current transformer, a resonant unit, a rectification unit and a control unit for controlling the rectification unit to adjust a direct-current output voltage of the rectification unit. According to the invention, a resonant capacitor is connected in parallel to an output terminal of the current transformer, so that excited inductance resonance is realized between the resonant capacitor and the current transformer in parallel connection. The electric energy obtained by induction is increased under the effect of the same high-voltage side currents; specially, when the high-voltage side current is low, the enough electric energy can be ensured to be obtained by the induction for providing for a load, thereby improving stability of an output power of the direct-current source. Meanwhile, because of improvement of the power taking efficiency of the transformer, the size of the direct-current source can be reduced to an optimal one, thereby effectively reducing the manufacturing cost of the transformer. In addition, a controllable rectifier bridge is used and thus the output voltage can be controlled according to a corresponding control strategy, thereby improving the service life of the transformer.

The invention relates to a marine instrument and meter power supply device based on sea wave energy capture. The traditional piezoelectric generating device has low generating efficiency. The device comprises a seal ball, metal cantilever beams, a mass block, a rectifying circuit and a super-capacitor, wherein the mass block is arranged at a ball center in the seal ball; six strip flaky metal cantilever beams are arranged in the seal ball along the space three-dimensional axial direction; two metal cantilever beams are arranged in each axial direction and positioned at both sides of the mass block; one end of each metal cantilever beam is fixed to the inside wall of the seal ball, and the other end extends into a rectangular groove which is correspondingly opened on the mass block; the metal cantilever beams and the rectangular grooves form slide fit; the upper surface and the lower surface of each metal cantilever beam are correspondingly provided with energy converting devices, the outputs of the energy converting devices are connected with the input of the rectifying circuit, and the output of the rectifying circuit is connected with the super-capacitor. The invention can obtain persistent power supply by utilizing the endless motion of waves.

A composite anode for a solid oxide fuel cell (SOFC), comprising an anode support layer (ASL) of Ni—YSZ and an anode functional layer (AFL) of Ni—GDC, displays enhanced mechanical stability and similar or improved electrical efficiency to that of a Ni—GDC ASL for otherwise identical SOFCs. A SOFC employing the composite anode can be used for power generation at temperatures below 700° C., where the composite anode may include a second AFL of GDC disposed between the Ni—GDC layer and a GDC electrolyte.

The invention relates to an on-line real-time torque optimal distribution control method of a distributed driving electric automobile, belongs to the technical field of torque optimal distribution control of an electric automobile, and solves the problems that conventional electric automobile torque optimal distribution control methods are based on models, and are optimized in an off-line manner, so that massive characteristic testing data of electrical efficiency is required, and large deviation exists with the actual situation. The on-line real-time torque optimal distribution control method is realized based on an on-line real-time torque optimal distribution control device of the distributed driving electric automobile, and comprises the following steps of collecting the real-time speed of the electric automobile, rotating speeds of four driving motors and opening analog quantity signals of an accelerator pedal of the electric automobile; calculating real-time total demand torque of the four driving motors when the electric automobile travels; and then calculating an optimal distribution coefficient of the torque when the total efficiency of the four driving motors of the electric automobile is optimal, and separately controlling four control motors to output the torque to four driving motor controllers. The on-line real-time torque optimal distribution control method disclosed by the invention is suitable for on-line real-time torque optimal distribution control.