Abstract: An insulation type step-up converter includes a core, first and second primary-side coils, a secondary-side coil, and a switching element. The core includes a middle leg, and first and second outer legs. The switching element is configured such that it can be controlled to be on/off so that electric currents flowing simultaneously in the first and second primary-side coils are opposite in direction to each other.

Abstract: An isolated converter reduced in size compared with a conventional isolated converter and having a high heat dissipation characteristic is provided. The isolated converter includes a multilayer substrate having a first through hole and a magnetic core partially passing through the first through hole. The multilayer substrate includes a first conductor pattern formed at a position overlapping the magnetic core on a second surface when viewed from a direction orthogonal to a first surface, a second conductor pattern formed between the first surface and the second surface at a position overlapping the magnetic core and the first conductor pattern when viewed from the direction orthogonal to the first surface, at least one thermal conductive member formed on the first conductor pattern and having a portion disposed between the multilayer substrate and the magnetic core, and an electric insulating layer electrically insulating the first conductor pattern from the second conductor pattern.

Abstract: An insulation type step-up converter includes a core, first and second primary-side coils, a secondary-side coil, and a switching element. The core includes a middle leg, and first and second outer legs. The switching element is configured such that it can be controlled to be on/off so that electric currents flowing simultaneously in the first and second primary-side coils are opposite in direction to each other.

Abstract: Provided is a highly reliable power circuit device. The power circuit device includes a printed substrate, a power circuit, and a housing. The power circuit is formed on the printed substrate. The housing is connected with the printed substrate. The power circuit includes secondary-side switching elements, at least one smoothing choke coil, and smoothing capacitors. Portions of a smoothing choke coil core serving as a core of the smoothing choke coil are inserted in opening portions formed in the printed substrate. A winding of the smoothing choke coil is formed on the printed substrate. The smoothing choke coil is located between a region C in which the smoothing capacitors are arranged and regions A and B serving as a second region in which primary-side switching elements and the secondary-side switching elements serving as electric elements are arranged.

Abstract: An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth series coils, respectively, the first, second, third, and fourth series coils each having the output-side coil of the first step-down transformer and the output-side coil of the second step-down transformer connected in series. The first to fourth series coils are connected to smoothing coils. The connection is such that electric currents flow simultaneously only in one of the first and second series coils and one of the third and fourth series coils in an alternate manner, and electric currents flowing simultaneously in one of the first and second series coils and one of the third and fourth series coils are opposite in direction to each other.

Abstract: A circuit device and a power converter include a core, a coil surrounding at least a part of the core, and a first heat transfer member being in surface contact with the core. A temperature rise of the core can thus be prevented or reduced.

Abstract: An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth series coils, respectively, the first, second, third, and fourth series coils each having the output-side coil of the first step-down transformer and the output-side coil of the second step-down transformer connected in series. The first to fourth series coils are connected to smoothing coils. The connection is such that electric currents flow simultaneously only in one of the first and second series coils and one of the third and fourth series coils in an alternate manner, and electric currents flowing simultaneously in one of the first and second series coils and one of the third and fourth series coils are opposite in direction to each other.

Abstract: A printed board includes an insulating layer, and radiation vias penetrating printed board are formed in both a first region overlapping electronic component and a second region outside the first region. A plurality of conductor layers included in printed board are cross-connected to a plurality of radiation vias. Diffusion radiator includes a thermal diffusion plate, a radiation member, and a cooling body. Radiation member is in close contact with one of main surfaces of cooling body, and thermal diffusion plate is in close contact with one of main surfaces of radiation member on the opposite side to cooling body. One of main surfaces of thermal diffusion plate on the opposite side to radiation member is bonded to a conductor layer on the other main surface of printed board so as to close the plurality of radiation vias.

Abstract: Provided is a novel method capable of producing an artificial skin model. A method for producing an artificial skin model includes: providing coated cells (1), each of which is obtained by covering the surface of a cell (3) with a coating film (2) containing an extracellular matrix component; forming a dermis tissue layer (7), in which the coated cells (1) are laminated, by culturing the coated cells (1); and forming an epidermis layer (12) by arranging epidermis cells (8) on the dermis tissue layer (7).

Abstract: An insulation type step-down converter includes first, second, third, and fourth secondary-side coils, and first, second, third, and fourth rectifier elements. The first, second, third, and fourth rectifier elements is capable of performing rectification such that electric currents flow alternately only in one of the first and second secondary-side coils and one of the third and fourth secondary-side coils, and electric currents flowing simultaneously in one of the first and second secondary-side coils and one of the third and fourth secondary-side coils are opposite in direction to each other so as to cancel out a magnetic flux passing through the middle leg each time when electric current flowing in the primary-side coil is changed in direction. Provided is an insulation type step-down converter which can minimize an increase in heat generated by the primary-side coil even at a large step-down ratio of a step-down transformer without raising manufacturing costs.

Abstract: An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. An intermediate portion of the output-side coil of the first step-down transformer and an intermediate portion of the output-side coil of the second step-down transformer are connected to each other. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth output-side coils, respectively. Smoothing coils are connected to the first to fourth output-side coils. The first, second, third, and fourth rectifier elements are connected such that electric currents flow simultaneously in the first output-side coil and the third output-side coil, and electric currents flow simultaneously in the second output-side coil and the fourth output-side coil in a manner alternating with the electric currents in the first output-side coil and the third output-side coil.

Abstract: An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. An intermediate portion of the output-side coil of the first step-down transformer and an intermediate portion of the output-side coil of the second step-down transformer are connected to each other. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth output-side coils, respectively. Smoothing coils are connected to the first to fourth output-side coils. The first, second, third, and fourth rectifier elements are connected such that electric currents flow simultaneously in the first output-side coil and the third output-side coil, and electric currents flow simultaneously in the second output-side coil and the fourth output-side coil in a manner alternating with the electric currents in the first output-side coil and the third output-side coil.

Abstract: Two or more switching devices (36) and two or more lead frames (41, 42, 43, and 44) are integrally molded by use of a molding resin (37) so that a power module (30) is formed; the power module (30) is made to adhere to a heat sink (32) via an insulating material (31); the power module (30) and the heat sink (32) are fixed to a housing (33) of the power module composite (23); the power module composite (23) is fixed to a case (6) of an electric rotating machine (1) via the housing (33).

Abstract: An insulation type step-down converter includes first, second, third, and fourth secondary-side coils, and first, second, third, and fourth rectifier elements. The first, second, third, and fourth rectifier elements is capable of performing rectification such that electric currents flow alternately only in one of the first and second secondary-side coils and one of the third and fourth secondary-side coils, and electric currents flowing simultaneously in one of the first and second secondary-side coils and one of the third and fourth secondary-side coils are opposite in direction to each other so as to cancel out a magnetic flux passing through the middle leg each time when electric current flowing in the primary-side coil is changed in direction. Provided is an insulation type step-down converter which can minimize an increase in heat generated by the primary-side coil even at a large step-down ratio of a step-down transformer without raising manufacturing costs.

Abstract: A rotating electrical machine includes: a case; a rotor; a stator; a control portion including a field circuit portion used to supply a current to a control circuit and the field winding; a power circuit portion controlling a stator current; a heat sink installed so as to cool the control portion and the power circuit portion; a first waterproof portion providing waterproofing to signal terminals of the power circuit portion and the field circuit portion; a second waterproof portion provided with through-holes from which a part of the control portion and the power circuit portion is exposed and providing waterproofing between the control portion as well as the power circuit portion and the heat sink; and insulation portions installed in the through-holes of the second waterproof portion and isolating the control portion and the power circuit portion from the heat sink.

Abstract: Provided is a rotating electrical machine capable of downsizing. The rotating electrical machine includes: a stator (2) including an armature winding (9); a rotor (3) provided inside the stator (2) in a rotatable manner; a power circuit unit (18) including a power circuit semiconductor switching element, for supplying a current to the armature winding (9); and a control board (6) in which an energization-allowed time corresponding to revolution speed of the rotor (3) is set, for controlling supply of the current by the power circuit unit (18), in which the control board (6) stops the supply of the current by the power circuit unit (18) when an integrated time of energization times to the armature winding (9) is longer than the energization-allowed time.

Abstract: Provided is a novel method capable of manufacturing an artificial skin model including dendritic cells. A method for manufacturing an artificial skin model includes the following: forming a dermal tissue layer by culturing coated cells in which a cell surface is coated with a coating film containing an extracellular matrix component, so that the coated cells are layered; forming a basal layer including type IV collagen on the dermal tissue layer by bringing type IV collagen into contact with the dermal tissue layer; and forming an epidermal layer by arranging epidermal cells on the basal layer. At least one of the dermal tissue layer and the epidermal layer includes dendritic cells.

Abstract: Two or more switching devices (36) and two or more lead frames (41, 42, 43, and 44) are integrally molded by use of a molding resin (37) so that a power module (30) is formed; the power module (30) is made to adhere to a heat sink (32) via an insulating material (31); the power module (30) and the heat sink (32) are fixed to a housing (33) of the power module composite (23); the power module composite (23) is fixed to a case (6) of an electric rotating machine (1) via the housing (33).

Abstract: A rotating electrical machine includes: a case; a rotor; a stator; a control portion including a field circuit portion used to supply a current to a control circuit and the field winding; a power circuit portion controlling a stator current; a heat sink installed so as to cool the control portion and the power circuit portion; a first waterproof portion providing waterproofing to signal terminals of the power circuit portion and the field circuit portion; a second waterproof portion provided with through-holes from which a part of the control portion and the power circuit portion is exposed and providing waterproofing between the control portion as well as the power circuit portion and the heat sink; and insulation portions installed in the through-holes of the second waterproof portion and isolating the control portion and the power circuit portion from the heat sink.

Abstract: An object of the present invention is to provide an electrical rotating machine capable of securing safety against collision. Included are a rotor having a field winding and cooling fans, and a stator having a stator winding, arranged so as to surround the rotor. A bracket 1 is fixed to a load side end of the stator, and a heat sink is disposed inside the bracket. On the anti-load side of the heat sink, a field circuit unit and power circuit units for controlling the field winding and the stator winding, respectively, are mounted, whereas on the load side thereof, cooling fins are disposed. The anti-load side and lateral side of the field circuit unit and the power circuit units are surrounded by the bracket. Accordingly, a whole of the field circuit unit and the power circuit units is surrounded by the bracket and the heat sink.