Honda Motor Co., Ltd.

Asahi Rubber Inc.

Yuta Ito

Takuya Yoshizawa

Munehiro Matsubara

Hiroyuki Matsuoka

Satoyoshi Oya

Takeru Kawaguchi

Nobuyuki Tomizawa

Masutugu Tasaki

Yoshihisa Kubota

Shu Taguchi

Hidetomo Fujiwara

Yoshito Tsukamoto

Ken Ito

Tomokazu Naito

Tatsuro Akasaka

Daiki Hama

An ultraviolet LED optical member has high transmittance in an ultraviolet range, is stable even by long-term use and has excellent reliability. The ultraviolet LED optical member exhibits optical characteristics in which the average transmittance at wavelengths from 200 to 300 nm is 50% or more by having an optical member made of an organic resin. The optical member for this ultraviolet LED optical member preferably exhibits optical characteristics in which the transmittance of at least any wavelength from 200 to 250 nm is at least 60%.

Ultraviolet led optical member

A method for modifying optical properties of a synthetic resin increases a transmittance by modifying, removing, or reducing factors which absorb wavelengths in an ultraviolet range, such that it is possible to maintain stable and excellent reliability even after a long-term use. In a method for modifying optical properties of a synthetic resin, a modification treatment which is an energy irradiation treatment is performed on a cured product made of a synthetic resin to increase a transmittance in an ultraviolet range. For example, the modification treatment which is at least one of a photo-oxidation treatment and a thermal oxidation treatment is performed on the cured product made of the synthetic resin to increase the transmittance.

Method for modifying optical properties of synthetic resin

Provided is a vibration reduction device for stator vanes () positioned behind rotor blades () in a turbo machine, comprising an annular base member () having a cylindrical shape concentric around a central axis of the casing and supporting base ends of the stator vanes which extend radially inward from an inner circumferential surface of the base member, an elastomeric damping member () surrounding and in slidable contact with an outer circumferential surface of the base member, and a preloading member () surrounding an outer circumferential surface of the elastomeric damping member and configured to apply a preload directed radially inward to the elastomeric damping member.

Turbo machine with vibration reduction device for stator vanes

A stator core for a rotary electric machine is provided, which includes core members stacked and formed annularly so as to surround a rotor, each core member including a plurality of slots extending from one end to another end in a shaft direction and teeth formed between the slots. A whole of the teeth includes a first teeth section including, at a tip on an inner periphery side of each core member, each tooth including a first protrusion portion and a second protrusion portion with a lower protrusion height than the first protrusion portion protruding in a circumferential direction of each core member and a second teeth section including a pair of the first protrusion portions and/or a pair of the second protrusion portions.

Rotary electric machine with a stator core with teeth having different protrusion portions heights

A rotary electric machine includes a rotor, and a rotor shaft connected to the rotor so as to be integrally rotatable and provided with a coolant flow path through which a coolant flows. The rotor shaft includes a first rotor shaft and a second rotor shaft which is inserted into the first rotor shaft and is connected to the first rotor shaft so as to be integrally rotatable. The first rotor shaft includes an opposing surface opposed to a tip surface of the second rotor shaft, and a coolant supply path extending radially from a vicinity of the opposing surface. A gap is provided between the opposing surface of the first rotor shaft and the tip surface of the second rotor shaft. The gap constitutes a connection flow path connecting the coolant flow path and the coolant supply path.

Rotary electric machine

To provide a rotor of a rotary electric machine having higher cooling performance than that of the related art. In a rotor structure of a rotary electric machine, on a surface on the side of a rotor core () of a first end surface plate (), a plurality of grooves () that radially extend are provided, and a first annular groove () that annularly extends along a circumference of an insertion hole () into which a shaft () is inserted is provided. In addition, the first annular groove () is connected to radially inside end portions of the grooves () and a refrigerant supply hole portion () of the rotor core (), and a depth of the first annular groove () is set to be larger than a depth of the grooves ().

Rotor structure of rotary electric machine

A rotary electric machine includes a rotor, a stator which is disposed on an outer circumferential side of the rotor and includes a stator core and a coil, a first cooling mechanism which supplies a coolant to the coil from an outer circumferential side of the stator, and a second cooling mechanism which supplies a coolant to the coil from an inner circumferential side of the stator. The coil includes a plurality of segment cods, each including a pair of leg portions, and a connection portion connecting one end sides of the leg portions. A close-side coil end constituted by the connection portion and an open-side coil end constituted by the lea portions are provided on respective end sides of the stator core. A supply amount of the coolant supplied from the second cooling mechanism is larger to the close-side coil end than to the open-side coil end.

A bus bar unit includes: a plurality of bus bars which electrically connect coils of respective phases of a rotating electric machine and an external power source to each other, and integrally form external connection terminals; and a bus bar integral holding portion which covers parts of the plurality of bus bars and electrically insulates the plurality of bus bars to each other. Each bus bars is equal in thickness from the external connection terminal to a bus bar joining portion joined to a coil joining portion of each phase, and a width of the bus bar joining portion is wider than that of the coil joining portion.

Bus bar unit

A magnet temperature estimation device for a rotating electric machine includes a rotating electric machine configured with a rotor having a magnet and a stator having a coil, a coolant supply part configured to supply a coolant flowing from the stator toward the rotor, and a magnet temperature calculation part configured to calculate a temperature of the magnet using a temperature of a coolant that receives heat from the coil.

Magnet temperature estimation device for rotating electric machine and magnet temperature estimation method for rotating electric machine

A winding temperature estimation device for a rotating electric machine includes a rotating electric machine including a stator, which has a winding, and a rotor, a coolant supply part configured to supply a coolant, a temperature sensor configured to detect a temperature of the coolant, a heat reduction amount calculation part configured to calculate a heat reduction amount of the winding using the temperature of the coolant and a heat resistance between the coolant and the winding, a heating value calculation part configured to calculate a heating value due to a loss of the winding, and a winding temperature calculation part configured to calculate a temperature of the winding using the heat reduction amount from the winding and the heating value due to the loss of the winding.

Rotating electric machine winding temperature estimation device and rotating electric machine winding temperature estimation method

A temperature estimation apparatus for a rotating electric machine includes a coolant dissipator, a heat dissipation amount calculator, a coolant temperature calculator, and a temperature calculator. The coolant dissipator is to cool down a coolant by heat exchange with a cooling air outside a rotating electric machine. The heat dissipation amount calculator is to calculate heat dissipation amount of the coolant in the coolant dissipator based on a physical quantity correlating with air speed of the cooling air and a physical quantity correlating with flow rate of the coolant. The coolant temperature calculator is to calculate, based on the heat dissipation amount, temperature of the coolant that has passed through the coolant dissipator. The temperature calculator is to calculate, based on the temperature of the coolant, temperature of the rotating electric machine which the coolant cool down.

Temperature estimation apparatus for rotating electric machine

In a magnet temperature estimating method, in the event that a rotor of a rotary electric machine is cooled by a cooling oil, a magnet temperature calculator estimates the magnet temperature of magnets provided on the rotor, based on losses of the rotary electric machine including a loss of the rotor and the temperature of the cooling oil.

Method of estimating magnet temperature for rotary electric machinery

A magnet temperature calculator estimates a magnet temperature of a rotary electric machine using at least parameters related to a transmission that is coupled to the rotary electric machine.

Growing community of inventors

Saitama, Japan

Yuta Ito