32results about How to "Reduce ohmic losses" patented technology

The invention relates to a novel manufacturing method of a planar spiral inductor. Manufacturing of the planar spiral inductor is carried out through a glass or quartz substrate; manufacturing of the planar spiral inductor is achieved by an MEMS technology which comprises a metal thin film deposition process, a dielectric layer thin film deposition technology, a thick metal layer plating process, a thick resist lithography process, an etching process and the like; the planar spiral inductor and the substrate do not need to be isolated by a thick insulating layer; and the plane shape of the planar spiral inductor and the thickness of a coil are not limited. Manufacturing of the planar spiral inductor is achieved by the MEMS technology on the glass or quartz substrate; the coupling effect and the skin effect between the coil and the substrate at a high frequency are avoided; a high Q-value inductor can be achieved; meanwhile, the thickness of a metal layer of an inductance coil is not limited; and the loss of the coil is low. The technology is simple; the requirements of multiple fields of a signal isolator, a planar antenna, a microwave baseband line, a planar spiral inductor resonator and the like can be met; and the process difficulty is reduced.

A nonvolatile nanoionic switch is disclosed. A thin layer of chalcogenide glass engages a substrate and a metal selected from the group of silver and copper photo-dissolved in the chalcogenide glass. A first oxidizable electrode and a second inert electrode engage the chalcogenide glass and are spaced apart from each other forming a gap therebetween. A direct current voltage source is applied with positive polarity applied to the oxidizable electrode and negative polarity applied to the inert electrode which electrodeposits silver or copper across the gap closing the switch. Reversing the polarity of the switch dissolves the electrodeposited metal and returns it to the oxidizable electrode. A capacitor arrangement may be formed with the same structure and process.

The invention discloses a reverse polymer solar cell with a dual electron transport layer structure. In the cell, a layer of organic n type doped electron transport layer is introduced into the current most advanced reverse photovoltaic device structure (a cathode/electron take-out layer/light active layer/cavity collecting layer (transition metal oxide layer)/anode), and the reverse photovoltaic device structure is upgraded into a structure of a cathode/organic n type doped electron transport layer/electron take-out layer/light active layer/cavity collecting layer (transition metal oxide layer)/anode. Compared with a non-upgraded structure, the structure has the characteristics of low power consumption, high stability, high photogenerated electron collecting efficiency and high performance, and the defects of overhigh inner series connection resistance and low photogenerated electron collecting efficiency existing in the current reverse polymer solar cell can be overcome; and the structure plays a positive role in promoting the commercialization of the current polymer photovoltaic technology.

The invention belongs to the field of wireless communication and relates to an antenna device used in a short-distance wireless communication system. The antenna device is the antenna device formed in mobile electronic equipment, and comprises a coil conductor, a flexible substrate, a magnetic material and a housing conductor layer, wherein the coil conductor is an annular or helical coil employing a winding center part as a coil opening part; the coil conductor and the flexible substrate which is attached to the coil conductor are assembled on the surface of a magnetic sheet material; the coil conductor is shielded and divided into two areas by the housing conductor layer; the first area is a non-shielding part of the housing conductor layer, namely an actual magnetic link coupling part of the antenna; a narrow linewidth design is adopted by the coil conductor of the part or the narrow linewidth design is mainly adopted; a dual-conductor layer parallel design is adopted; the second area is a shielding part of the housing conductor layer; and a wide line design is adopted by the coil conductor of the area. The antenna device has the beneficial effects that the structural integrity of the metal part of a mobile equipment housing is not destroyed; the occupied space is small; and the performance is high.

The invention discloses an SPE (Solid Polymer Electrolyte) electrolysis system used for tritium concentration. The electrolysis system comprises an electrolytic tank system, a tritiated water supply system, a gas-liquid separator, a tritiated water collection system, a hydrogen drying system, an oxygen drying system, a hydrogen collection system, a product oxygen collection and storage tank, a condensation system and a detection and control system. The invention further provides a realization method for the SPE electrolysis system used for tritium concentration. The electrolysis system can meet all process demands of aqueous phase tritium concentration, wherein the processes include a tritiated water circulating concentration process, a hydrogen leakage emergency power-off process, a molecular sieve drying bed continuous treatment process and the like. Meanwhile, due to the tritiated water circulating concentration, the tritiated water concentration can be quantitatively controlled, so that the tritium concentration efficiency is greatly improved and a large amount of tritium-poor hydrogen is obtained.

The invention relates to a same-side interconnected solar cell string, a preparation method thereof, a solar cell assembly and a solar cell system. The same-side interconnected solar cell string comprises N-type crystalline silica solar cells and P-type crystalline silica solar cells. The N-type crystalline silica solar cells and the P-type crystalline silica solar cells are alternatively arranged. Each two adjacent N-type crystalline silica solar cell and P-type crystalline silica solar cell are interconnected through a conductive belt at the same side. The same-side interconnected solar cell string has beneficial effects of relatively high conversion efficiency and simple raw material source. The solar cell string is obtained through serial connection in a same-side interconnected manner. Stress damage of a welding belt to a cell plate can be effectively reduced; arrangement space among the cell plates can be infinitely reduced; and the conductive belt with larger thickness can be used for realizing serial connection of the cell plates, thereby improving reliability and long-term stability of the photovoltaic assembly, and prolonging service life of the photovoltaic assembly.

The invention discloses a Ku-band circularly-polarized cone beam antenna comprising an open circular waveguide, a large coaxial waveguide, a small coaxial waveguide, a rectangular waveguide, an SMA connector, and a dielectric plate clamped between the open circular waveguide and the large coaxial waveguide and printed with a hook structure. The printed hook structure and the large coaxial waveguide simultaneously excite two radially-symmetric circular waveguide modes (TM01 and TE01) of which the spatial positions are perpendicular to each other, the phase difference is 90 degrees and the amplitudes are the same, thus generating a circularly-polarized far-field cone radiation pattern. Conversion coaxial to the rectangular waveguide is formed twice between the large coaxial waveguide and the SMA connector to complete feeding of the whole antenna. Under the condition of maintaining the compact structure of the circularly-polarized cone beam antenna, good circularly polarized radiation characteristic and impedance matching characteristic are achieved at the resonant frequency of 12.5 GHz.

The invention discloses a metamaterial unit for encoding a metamaterial antenna. The metamaterial unit comprises a resonance unit, a back cavity and a transmission line structure; the resonance unit comprises a resonance substrate, and the middle part of the resonance substrate is provided with a clearance groove which penetrates through the resonance substrate and is internally provided with a sheet-shaped conductor; a connecting gap is formed between the sheet-shaped conductor and the resonance substrate, and two diodes are arranged in the connecting gap; the back cavity comprises a back cavity substrate, a through rectangular groove is formed in the middle of the back cavity substrate, and metal films are attached to the four inner walls of the rectangular groove respectively; the transmission line structure comprises a waveguide substrate, and a waveguide slot is formed in the middle of the metal layer. According to the invention, guided waves enter from the waveguide slot of the transmission line structure; indirect feeding of the resonance unit is achieved through the coupling effect of the back cavity, a transmission line structure and a current path of the resonance unit are directly isolated, then current flowing through the diode is restrained, ohmic loss generated when the diode is conducted is reduced, and therefore, the overall performance of the metamaterial unitused for encoding the metamaterial antenna is improved.

The invention relates to a permanent magnet synchronous motor, in particular to a single-stator spiral motion multi-phase permanent magnet synchronous motor capable of fault-tolerant operation. The motor comprises a stator and a rotor, the rotor is positioned on the inner side of the annular stator; the rotor comprises a magnetic conductive rotating shaft and permanent magnet sheets which are alternately distributed on the surface of the magnetic conductive rotating shaft and have polarities of N and S, the stator comprises a stator iron core and a stator winding, the stator iron core is provided with a spiral tooth groove, the spiral direction of the spiral tooth groove and the positive direction of the axis of the motor are in a right-handed spiral relation, six-phase windings A, D, C, F, B and E are sequentially arranged in the spiral tooth groove in the clockwise direction, and the six-phase windings adopt a six-phase double-Y-shift 30-degree winding structure. Materials are saved,the cost is low, the fault-tolerant capability is high, and the working stability of the motor is improved.

The invention relates to a circuit device for an input protection circuit of a switching power supply and the switching power supply. The circuit device has a surge protection circuit which is in contact with supply voltage on the input side and a current compensation choke is used as a suppression component and is connected with the surge protection circuit. The current compensation choke is connected to a rectification circuit comprising an energy storage device on an output side. A circuit technology is modified, for example, two rheostats are used as surge protection, and by using a suitable switching element such as a silicon diode as a rectifying element and using a ceramic capacitor as the energy storage device, the input protection circuit is designed such that a requirement for anextended input voltage range of the surge circuit is satisfied. The switching power supply has the circuit device for an input protection circuit according to the invention.

A device, system and method for producing enhanced external quantum efficiency (EQE) LED emission are disclosed. The device, system and method include a patterned layer configured to transform surfacemodes into directional radiation, a semiconductor layer formed as a III/V direct band gap semiconductor to produce radiation, and a metal back reflector layer configured to reflect incident radiation. The patterned layer may be one-dimensional, two-dimensional or three-dimensional. The patterned layer may be submerged within the semiconductor layer or within the dielectric layer. The semiconductor layer is p-type gallium nitride (GaN). The patterned layer may be a hyperbolic meta-materials (HMM) layer and may include Photonic Hyper-crystal (PhHc), or may be a low or high refractive index material or may be a metal.

The invention discloses an optimization structure of a combined foam flow field for a solid oxide electrolysis tank. The structure is concretely characterized in that a cathode inlet cavity distribution zone, a cathode metal foam and a cathode outlet agglomeration zone are sequentially connected to form a cathode flow field, and the flow field is placed between a cathode bipolar plate and a cathode gas diffusion layer. An anode inlet cavity distribution, an anode metal foam and an anode outlet agglomeration zone are horizontally connected to form an anode flow field, and the flow field is placed between an anode bipolar plate and an anode catalysis layer. The connection order of the cathode inlet cavity distribution zone, the cathode metal foam and the cathode outlet agglomeration zone isopposite to the connection order of the corresponding zones of the anode, and the directions of two gas flow paths intersect with each other. The metal foams have good electrical and thermal conductivity, have a large porosity, and can promote the transmission of gases from the flow fields to the diffusion layer and the catalysis layer, so the concentration of reactants in the cathode catalysis layer is increased, the concentration of an anode product is reduced, and the matter distribution uniformity is improved.

The invention discloses an ultra-broadband power divider based on ridge-gap waveguide technology, relates to the field of microwave/millimeter wave passive devices, and is specifically an ultra-broadband power divider/combiner based on novel ridge-gap waveguide technology. In order to overcome the shortcomings in the prior art, the operating bandwidth of the solid-state power amplifier is improved so that it can work effectively in several frequency bands, thereby saving design cost. The invention proposes an ultra-wideband ridge-gap waveguide power divider/combiner, which has the advantages of large power capacity, ultra-wideband (3 octaves), compact structure, low loss, good amplitude-phase consistency, and easy processing and assembly. .

The invention relates to a winding arrangement (3) for a multi-phase electric machine (100; 100a), in particular an asynchronous machine or synchronous machine, comprising a stator (1) having stator slots (2), wherein at least one first coil (8A) formed by a coil wire (7) forms a lower layer (9) in the stator slots (2) and at least one second coil (8B) forms an upper layer (10) on the lower layer(9) in the stator slots (2), and wherein the first and the second coils (8A, 8B) are electrically contacted with one another.

The invention provides an optical control integrated on-chip inductor, belonging to the technical field of microelectronic devices. An optical control inductor structure comprises a photomagnetic material, a metal wire, a silica isolation layer and a silicon substrate, wherein a photomagnetic material coil layer represents a main body of an optical control on-chip inductor and is arranged on the substrate, the photomagnetic material senses lighting change, results in change of overall magnetic conductivity of the coil through change of the magnetic conductivity, so as to change inductance. A silica insulating layer is added between the inductor coil and the substrate, and is used for isolating eddy loss of the substrate, further, the metal wire is made of a highly conductive material, so that ohmic loss of the metal is reduced, quality factor of the inductor is improved greatly, and overall performance of the circuit is improved.

The invention relates to the technical field of electromagnetic coupling, and particularly discloses an integrated electromagnetic coupling mechanism and an electric energy transmitting end, receiving end and transmission system thereof; the coupling mechanism comprises a first outer magnetic pole P1, a first dielectric medium and a first inner electromagnetic pole P2 which are stacked, and a second inner electromagnetic pole P4, a second dielectric medium and a second outer magnetic pole P3 which are stacked, the first inner electromagnetic pole P2 and the second inner electromagnetic pole P4 are opposite to each other, and the distance between the first inner electromagnetic pole P2 and the second inner electromagnetic pole P4 is dt. The electromagnetic poles P1, P2, P4 and P3 are all formed by spirally winding square metal lines with the same specification in the same direction. According to the electric energy transmission system provided by the invention, on the basis of the integrated electromagnetic coupling mechanism, a circuit theory and a mutual inductance coupling theory, an equivalent circuit of the coupling mechanism is simplified, a system alternating current impedance model is established, and the self-compensation of the coupling mechanism is realized by analyzing and calculating a relationship among electric parameters of the coupling mechanism; and the working condition of the zero input impedance angle of the system is given.