59results about How to "Excellent power generation characteristics" patented technology

Provided are a piezoelectric thin film including a lead-free ferroelectric material and exhibiting high piezoelectric performance comparable to that of PZT, and a method of manufacturing the piezoelectric thin film. The piezoelectric thin film of the present invention has a multilayer structure in which a metal electrode film having a plane orientation of (100), a (Bi,Na)TiO3 film, and a (Bi,Na,Ba)TiO3 film having a plane orientation of (001) are laminated in this order. The piezoelectric thin film of the present invention can be applied to a wide range of fields and uses. For example, with the piezoelectric thin film of the present invention, an angular velocity sensor of the present invention having high sensitivity and a piezoelectric generating element of the present invention having excellent power generation characteristics can be constructed.

A rotating electrical machine for a vehicle is capable of improving the acceleration performance and the fuel mileage of the vehicle while achieving the prevention of occurrence of overvoltage and the improvement of its power generation characteristic at the same time. The machine includes an armature having an armature core and an armature winding wound around the armature core for generating an output voltage to charge a battery; a rotor having a rotor core with a field winding wound therearound, and permanent magnets for supplying magnetic flux to the armature core; and a voltage control section that adjust the output voltage of the armature by controlling the field current based on the value of an output voltage of the armature winding and the value and the direction of flow of the field current flowing through the field winding.

Disclosed is a method for producing an assembly (30) of membrane, electrode, gas diffusion layer and gasket, which comprises a cathode sealing step wherein a cathode side gasket (6) is formed on the end faces of a cathode side gas diffusion layer (4) and a cathode catalyst layer (2) of a membrane-electrode-gas diffusion layer assembly (20), and an anode sealing step wherein an anode side gasket (7) is formed on the end faces of an anode side gas diffusion layer (5) and an anode catalyst layer (3) of the assembly (20). This method for producing a membrane-electrode-gas diffusion layer-gasket assembly (30) is characterized in that when C1 represents the thickness of the cathode side gasket (6), A1 represents the thickness of the cathode catalyst layer (2) and B1 represents the cathode side gas diffusion layer (4), the relation (1) shown below is satisfied. (A1 + B1) / C1 >= 1.2 (1).

A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC / DC conversion. The machine operates as a motor and a generator. The machine includes a multi-phase windings, switching elements forming a rectifying device, and a controller for controlling a current path of the multi-phase windings by switching the switching elements on and off to perform two modes of operation. The switching elements are switched such that one end of each windings is connected to either a high electrical potential end or a low electrical potential end of the rectifying device and the other ends of the windings connected together to be the same electrical potential are connected to either the high electrical potential end or the low electrical potential end in the rectifying device.

Provided are: an electrolyte material which is capable of providing a membrane electrode assembly that is not susceptible to flooding in a catalyst layer of the membrane electrode assembly and breakage of a solid polymer electrolyte membrane and has excellent power generation characteristics; and a method which enables the production of an electrolyte material that has suppressed low moisture content even though the electrolyte material is formed of a polymer that has a unit derived from a perfluoromonomer having a dioxolane ring. An electrolyte material which is formed of a polymer (H) that is obtained by exchanging -SO2F groups in a polymer (F) with ion exchange groups, said polymer (F) having a unit derived from a perfluoromonomer having an -SO2F group and a dioxolane ring, a unit derived from a perfluoromonomer having a dioxolane ring but not having an -SO2F group, and a unit derived from tetrafluoroethylene. This electrolyte material has an ion exchange capacity of 0.9-1.3 meq / g-dry resin and a moisture content of 20-100%.

Disclosed is a polyelectrolyte membrane comprising a polyelectrolyte containing an ion exchange group. The polyelectrolyte membrane satisfies a relationship represented by formula (I): Sp / Snp <= 0.42 (I) In formula (I), Sp represents the sum of areas of peaks in a spectrum obtained by the measurement of 13C-solid NMR of a polyelectrolyte membrane after subjecting the polyelectrolyte membrane to first immersion treatment in which the polyelectrolyte membrane is immersed in a 5 mmol / L aqueous iron (II) chloride tetrahydrate solution at 25 DEG C for one hour followed by drying under conditions of 25 DEG C and not more than 10 hPa for 12 hours; and Snp represents the sum of areas of peaks in a spectrum obtained by the measurement of 13C-solid NMR of a polyelectrolyte membrane after subjecting the polyelectrolyte membrane to second immersion treatment in which the polyelectrolyte membrane before the first immersion treatment is immersed in water at 25 DEG C for one hour followed by drying under conditions of 25 DEG C and not more than 10 hPa for 12 hours.