Abstract: An LED module substrate includes a substrate main body, an LED mounted on one plane of the substrate main body, and a contact mounted at an edge of the one plane of the substrate main body and electrically connected to the LED. A cover section covers the LED module substrate in which the contact and the thermal radiation sheet are exposed. A lamp is attached to a socket. The socket includes a terminal electrically connected to the contact by the attachment of the lamp. A luminaire main body includes a thermal radiator including a contact surface and a recess. The lamp attached to the socket is brought into contact with and thermally connected to the contact surface. The recess is provided in a position opposed to the terminal of the socket.

Abstract: A lighting circuit substrate is arranged in a cap so that one surface of a lighting circuit substrate and a flat portion of a cap projection are arranged so as to face each other. Also, lighting circuit components are mounted on the one surface of the lighting circuit substrate, and the lighting circuit components are arranged within the cap projection. Arrangement is such that a clearance between the lighting circuit substrate and the flat portion of the cap projection becomes larger than the height of a component whose projecting dimension from the lighting circuit substrate is the largest from among the lighting circuit components.

Abstract: There is provided a method of manufacturing a laminated rotor core, including: a mounting step of placing a core body on a carrier tray, the core body having a plurality of magnet insertion holes provided around the shaft hole, the carrier tray having a mount plate and a columnar guide member standing on a front surface of the mount plate 41, the placement of the core body being carried out by fitting the guide member into the shaft hole; an inserting step of inserting permanent magnets respectively in the magnet insertion holes; an injecting step of injecting a liquefied resin material in each of the magnet insertion holes; and a first preheating step of heating the core body before the mounting step, wherein the inserting step and the injecting step are carried out in a state in which the core body is placed on the carrier tray.

Abstract: There is provided a power supply circuit including a power converting unit, a control unit, and a power supply unit for control. The power converting unit converts a conduction angle controlled alternating-current voltage supplied via a power supply path so as to be supplied to a load. The control unit detects a conduction angle of the alternating-current voltage and controls conversion of a voltage by the power converting unit according to the detected conduction angle. The power supply unit for control is electrically connected to the power supply path and converts the alternating-current voltage so as to be supplied to the control unit.

Abstract: A power supply circuit includes a power converting unit, a current adjusting unit, and a control unit. The power converting unit is configured to convert an alternating-current voltage into a direct-current voltage and supply the direct-current voltage to a load. The alternating-current voltage is subjected to conduction angle control and is supplied via a power supply path. The current adjusting unit includes a branch path electrically connected to the power supply path and can switch a first path state and a second path state. The first path state feeds a part of an electric current flowing through the power supply path to the branch path. The control unit detects a conduction angle of the alternating-current voltage, controls the conversion of the direct-current voltage by the power converting unit according to the detected conduction angle, and controls the current adjusting unit according to the detected conduction angle.

Abstract: A method of manufacturing a laminated core, having a laminated core body 10a formed by laminating plural core sheets 11 and having magnet insertion holes 13, 14 with openings 17, 18 opening to a inner space 15 or an external side, inserting and resin-sealing permanent magnets 20, 21 in the magnet insertion holes 13, 14, with the openings 17, 18 blocked by a blocking member 23, the method including: temporarily connecting blocking member pieces 32 to be the blocking member 23 in each of the core sheets 11 and removing the blocking member 23 with the laminated core body 10a resin-sealed. By this, without a special blocking member, the permanent magnets 20, 21 are resin-sealed while the magnet insertion holes 13, 14, parts of which have the openings 17, 18, are blocked.

Abstract: According to one embodiment, a power supply device includes a switching circuit and a control circuit. The switching circuit adjusts, according to ON-OFF control for an input voltage, electric power supplied to a lighting load. The control circuit controls ON and OFF of the switching circuit such that the electric power supplied to the lighting load coincides with target power. The control circuit that operates at a frequency equal to or higher than a switching frequency of the switching circuit is used. That is, a control frequency of the control circuit for the switching circuit is equal to or higher than the switching frequency of the switching circuit.

Abstract: An LED module substrate includes a substrate main body, an LED mounted on one plane of the substrate main body, and a contact mounted at an edge of the one plane of the substrate main body and electrically connected to the LED. A cover section covers the LED module substrate in which the contact and the thermal radiation sheet are exposed. A lamp is attached to a socket. The socket includes a terminal electrically connected to the contact by the attachment of the lamp. A luminaire main body includes a thermal radiator including a contact surface and a recess. The lamp attached to the socket is brought into contact with and thermally connected to the contact surface. The recess is provided in a position opposed to the terminal of the socket.

Abstract: According to one embodiment, an LED lamp includes a lighting circuit, a storage, a thermal radiating body, an LED substrate, and a cover. The storage includes a pair of electrode pins electrically connected to the lighting circuit, and stores the lighting circuit in the interior thereof. The thermal radiating body integrally includes a lid portion configured to cover the storage and an arrangement portion located in a periphery of the lid portion. The LED substrate includes an LED configured to emit light upon receipt of power feed from the lighting circuit, and is arranged so as to be thermally connected to the arrangement portion of the thermal radiating body. The cover has translucency and covers the LED substrate.

Abstract: In one embodiment, a DC power supply unit includes a DC power supply source; a load circuit connected to an output end of the DC power supply source; a load state detection device to detect a load voltage or an electric quantity corresponding to the load voltage; and a control device to receive the detected output of the load state detection device. The control device controls a maximum output voltage of the DC power supply source so that the voltage difference between the maximum output voltage of the DC power supply source and the load voltage at the time of normal operation falls within a predetermined range in which arc discharge is suppressed.

Abstract: A method of manufacturing a laminated rotor core, includes a first process of placing segment dummy plates between an iron core and a die, each of each segment dummy plates covering one or more of plural magnet insertion portions and including a resin injection hole communicating to the one or more of the magnet insertion portions; a second process of injecting a resin from resin reservoir parts formed in any one of an upper die and a lower die holding the iron core through the resin injection hole of each segment dummy plate to the corresponding one or more of the magnet insertion portions; and a third process of detaching the segment dummy plates together with excess resin after the resin injected to the one or more of the magnet insertion portions is cured.

Abstract: In a method of manufacturing a laminated core, a laminated core body 14 including magnet insertion holes 12 and 13 with magnet pieces 15 inserted therein is placed between a molding (upper) die 10 and a retaining (lower) die 11, and a molding resin 19 is filled from resin reservoir portions (pots) 16 to fix the pieces 15 in the holes 12 and 13. Between the die 10 and the body 14, a guide member 18 is placed, which includes resin passages 31 provided from the portions 16 to the holes 12 and 13 and gates 30 connecting to the holes 12 and 13 on downstream sides of the passages 31. The method can reduce lead time of a production line without replacing the molding dies for different laminated rotor cores and thus without preparing different types of molding dies.

Abstract: A lighting circuit substrate is arranged in a cap so that one surface of a lighting circuit substrate and a flat portion of a cap projection are arranged so as to face each other. Also, lighting circuit components are mounted on the one surface of the lighting circuit substrate, and the lighting circuit components are arranged within the cap projection. Arrangement is such that a clearance between the lighting circuit substrate and the flat portion of the cap projection becomes larger than the height of a component whose projecting dimension from the lighting circuit substrate is the largest from among the lighting circuit components.

Abstract: A method of resin sealing a permanent magnet in a magnet insertion portion of a laminated body, the body formed by laminating plural core sheets and including the plural portions formed around a shaft hole in a center thereof, the portion connected to an internal space via an opening. The method includes a first process of positioning a blocking member blocking the opening from a side of the space in a way that the member is vertically-placed in a lower die or an upper die, while the both dies hold the body from both sides in an axial direction and close the portion; and a second process of filling a resin extruded from a resin reservoir portion provided in the die or the die into the portion having the magnet inserted therein and having the opening closed by the member.

Abstract: According to one embodiment, a lamp unit includes a housing having a cap, a light source arranged in the housing, and a lighting device arranged in the housing and configured to supply an electric power to the light source. The lighting device includes a main substrate formed into an annular shape having an opening to allow light from the light source to pass through. A filter circuit portion, a power conversion circuit portion, and a control circuit portion are provided in sequence in respective areas on the main substrate along the circumferential direction. In at least one of the areas on the main substrate, a sub-substrate to be electrically connected to the main substrate is provided so as to extend upright.

Abstract: According to one embodiment, in a power supply device, a power conversion circuit which outputs a power supply voltage to a load by converting the power supply voltage into a predetermined output voltage, and control circuit which has a ground potential which is different from that of the power conversion circuit, and controls the power conversion circuit are provided. In addition, a power supply circuit which supplies the power supply voltage to the control circuit by converting the power supply voltage into a control power supply which is insulated with respect to the ground voltage of the power conversion circuit.

Abstract: According to one embodiment, a power supply device includes a rectifying circuit configured to rectify an alternating-current power supply, a first capacitor configured to smooth a voltage after rectification, and a falling voltage chopper circuit configured to supply electric power to a load. The first capacitor is set to a capacity in which a section where a voltage after smoothing drops to an output voltage to the load is provided in a rectified half period of the alternating-current power supply. The falling voltage chopper circuit includes at least one switching element configured to receive an input of the voltage after smoothing, operate in a section where the voltage after smoothing exceeds the output voltage, and pause in a section of the output voltage and a second capacitor provided on an output side and having a capacity larger than the capacity of the first capacitor.

Abstract: A method of manufacturing a laminated rotor core, including inserting permanent magnets into magnet insertion portions of an iron core formed by laminating plural core sheets; and thereafter to fix the magnets, injecting resin into the magnet insertion portions from a resin reservoir part in a die holding the iron core; the method comprising: a first process of placing a segment dummy plate between the body and the die, the plate covering one or more of the plural magnet insertion portions individually and including a resin injection hole continuing thereto; a second process of injecting the resin from the resin reservoir part of the die through the resin injection hole of the plate to the corresponding magnet insertion portions; and a third process of detaching the dummy plate with excess resin after the resin injected to the magnet insertion portions is cured; and the method improving a resin sealing process.

Abstract: There is provided a rotor core which increases the quality and reliability thereof by preventing the occurrence of a core separation of the rotor core. There is provided a rotor core including a plurality of substantially cylindrical core blocks which are stacked on each other; and a plurality of magnets, characterized in that a plurality of magnet holes extending in an axial direction are provided in the plurality of core blocks so as to extend over the plurality of core blocks in that the plurality of magnets are accommodated in each of the plurality of magnet accommodation holes and fixed therein with a resin, and in that an axial position of core block boundary planes where the plurality of core blocks are brought into abutment with each other and an axial position of magnet boundary planes where the plurality of magnets are brought into abutment with each other differ from each other.

Abstract: In one embodiment, a DC power supply unit includes a DC power supply source; a load circuit connected to an output end of the DC power supply source; a load state detection device to detect a load voltage or an electric quantity corresponding to the load voltage; and a control device to receive the detected output of the load state detection device. The control device controls a maximum output voltage of the DC power supply source so that the voltage difference between the maximum output voltage of the DC power supply source and the load voltage at the time of normal operation falls within a predetermined range in which arc discharge is suppressed.