Abstract: The present invention discloses a control method and a control apparatus for a Flyback circuit. The Flyback circuit includes a primary switch, a secondary rectifier unit, a transformer and an output capacitor. The secondary rectifier unit includes a first terminal and a second terminal, which are electrically connected to the transformer and the output capacitor, respectively. In the control method for a Flyback circuit, after the secondary rectifier unit is controlled to be turned on once or twice according to the input voltage and/or output power of the Flyback, the primary switch is turned on to achieve the zero-voltage-switching. According to the invention, the zero-voltage-switching (ZVS) of the primary switch can be achieved under the entire input voltage range and the entire load range without adding additional power devices.

Abstract: The present invention discloses a control method and a control apparatus for a Flyback circuit. The Flyback circuit includes a primary switch, a secondary rectifier unit, a transformer and an output capacitor. The secondary rectifier unit includes a first terminal and a second terminal, which are electrically connected to the transformer and the output capacitor, respectively. In the control method for a Flyback circuit, after the secondary rectifier unit is controlled to be turned on once or twice according to the input voltage and/or output power of the Flyback, the primary switch is turned on to achieve the zero-voltage-switching. According to the invention, the zero-voltage-switching (ZVS) of the primary switch can be achieved under the entire input voltage range and the entire load range without adding additional power devices.

Abstract: A converter includes a transformer, a main switch, an active clamping circuit, a synchronous rectifying switch and a processing circuit. The transformer includes a primary winding and a secondary winding. The main switch is coupled to the primary winding. The active clamping circuit clamps the voltage across the main switch when it is OFF. The active clamping circuit includes an auxiliary switch. The synchronous rectifying switch is coupled to the secondary winding. The processing circuit determines whether the rectifying switch is in a main conducting period or a sub conducting period according to a first voltage signal across the rectifying switch and at least one detecting signal from the converter, and generates a driving signal to control the synchronous rectifying switch accordingly.

Abstract: A converter includes a transformer, a main switch, an active clamp circuit, and a control circuit. The transformer includes a primary winding and a secondary winding, and is configured to receive an input voltage and output an output voltage to a load. The main switch is coupled between the primary winding and a primary ground terminal. The active clamp circuit includes an auxiliary switch and a clamp capacitor. The auxiliary switch is coupled to the clamp capacitor in series, and the active clamp circuit is coupled in parallel to the two terminals of the primary winding or the main switch, and is configured to clamp the voltage across the main switch when it is OFF. The control circuit outputs an auxiliary switch control signal to turn on the auxiliary switch when the voltage across the main switch is at its first peak of the resonant voltage.

Abstract: Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200° C. and 600° C. A method for selectively reducing nitrogen oxides and an exhaust gas treatment system are also described.

Abstract: A power adaptor includes a main electric unit, a transformer unit and a bus capacitor unit. The main electric unit is disposed on a first surface. The transformer unit is configured on the main electric unit and disposed on a second surface. The first surface is perpendicular to the second surface. The main electric unit and the transformer unit form a containing space. The bus capacitor unit includes at least one bus capacitor. The bus capacitor unit is disposed in the containing space.

Abstract: Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200° C. and 600° C. A method for selectively reducing nitrogen oxides and an exhaust gas treatment system are also described.

Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.

Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.

Abstract: The present disclosure provides a winding unit, a magnetic component and power supply having the same. The winding unit includes: at least one winding having disposed in parallel, wherein each layer of the winding includes at least one turn of the winding, wherein at least one turn of the winding in at least one layer of the winding has a different width from at least one turn of the winding in an adjacent layer of the winding. Through the present disclosure, capacitance of parasitic capacitors of the winding unit may be effectively reduced, such that efficiency of the power supply may be improved.

Abstract: A liquid crystal display screen includes a first substrate, a first alignment layer, a liquid crystal layer, a second alignment layer, and a second substrate opposite to the first substrate. The liquid crystal layer is sandwiched between the first substrate and the second substrate. The first alignment layer and the second alignment layer are respectively disposed on the first substrate and the second substrate, and face the liquid crystal layer. The first alignment layer and the second alignment layer respectively include a plurality of parallel first grooves and second grooves perpendicular to the first grooves formed thereon facing the liquid crystal layer. Furthermore, at least one of the alignment layers includes a carbon nanotube layer and a fixing layer disposed thereon facing the liquid crystal layer. The carbon nanotube layer includes at least one carbon nanotube film pulled out from an array of carbon nanotubes.

Abstract: Described is a selective catalytic reduction catalyst comprising a zeolitic framework material of silicon and aluminum atoms, wherein a fraction of the silicon atoms are isomorphously substituted with a tetravalent metal. The catalyst can include a promoter metal such that the catalyst effectively promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150 to 650° C. In another aspect, described is a selective catalytic reduction composite comprising an SCR catalyst material and an ammonia storage material comprising a transition metal having an oxidation state of IV. The SCR catalyst material promotes the reaction of ammonia with nitrogen oxides to form nitrogen and H2O selectively over a temperature range of 150° C. to 600° C., and the SCR catalyst material is effective to store ammonia at temperatures of 400° C. and above.

Abstract: Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200° C. and 600° C. A method for selectively reducing nitrogen oxides and an exhaust gas treatment system are also described.

Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.

Abstract: The present invention provides a metal passivator/trap comprising a rare earth oxide dispersed on a matrix containing a calcined hydrous kaolin.

Abstract: A phosphorus modification of an FCC catalyst is provided by reducing the sodium content of the as formed catalyst, a first treatment with a phosphate solution, a second ammonium exchange to further reduce the sodium content of the phosphorus solution treated catalyst and a second treatment with a phosphate solution.

Abstract: A fan module includes a receiving rack, a number of mounting members, a number of fans, and a number of fastening members. The receiving rack includes two side plates and a number of receiving spaces between the side plates. A top side of each side plate corresponding to one receiving space defines two cutouts. Each mounting member is latched in one corresponding cutout of the receiving rack. Each fan is received in one corresponding receiving space of the receiving rack. The fastening members are arranged on the fans and are latched in the mounting members.

Abstract: A cable management apparatus includes a guide rail, a number of slide members slidably mounted to the guide rail, and a number of cable supports. Each of the cable supports includes two arms hinged to each other. Each of the arms forms a first end and a second end. The first end of the former one of two neighboring cable supports and the second end of the latter cable support are rotatably connected to the slide member between the neighboring cable supports. The first end of the last cable support is connected to the guide rail. The cable supports are unfolded with the slide members sliding forwards along the guide rail to spread a cable rested on the cable supports. The cable supports are folded with the slide members sliding rearwards along the guide rail to wind up the cable.

Abstract: A data storage device is inserted in an information handling apparatus, and is prevented from being accidently disconnecting from the information handling apparatus by an locking mechanism. The locking mechanism includes a frame receiving the data storage device, and a retainer mounted to the frame, and comprising two resilient arms extending out of the frame to be correspondingly secured in two retaining holes defined in the information handling apparatus.

Abstract: A phosphorus modification of an FCC catalyst is provided by reducing the sodium content of the as formed catalyst, a first treatment with a phosphate solution, a second ammonium exchange to further reduce the sodium content of the phosphorus solution treated catalyst and a second treatment with a phosphate solution.