Toyota Jidosha Kabushiki Kaisha

Nippon Steel Corporation

Toshimitsu Takahashi

Shinya Sano

Mayumi Takazawa

Takuya Nomura

Kazuaki Haga

Keiu Kanada

Yasuhide Yagyu

Takuya Kondo

Hisanori Koma

Takeshi Tomonaga

Masaaki Ito

Takeshi Hattori

Daisuke Okamoto

Kensuke Komori

Mamoru Ishikiriyama

Jung Hwan Hwang

Tatsuhiko Hirano

Naoki Iwata

Kohei Ishii

Hiroaki Wakimoto

Masashi Ohtsubo

Toshihiro Okazaki

Hiroaki Saitou

Masashi Hara

Satoshi Arai

Masaaki Kondo

Masaaki Tani

Shin Tajima

Yoji Sato

Shinjiro Saigusa

Yasuo Ohsugi

Eiji Yanagida

Shigeto Takeuchi

Junghwan Hwang

Tsuyoshi Hamaya

Sinjiro Saigusa

In an axial gap motor, a rotor includes a plurality of rotor cores fixed in a circumferential direction of a rotor base, and a stator includes a plurality of stator cores fixed in a circumferential direction of a stator base, and coils wound around the stator cores. End faces of each of the rotor cores and end faces of the corresponding stator core are opposed to each other while being exposed to each other.

Axial gap motor with curved rotor and stator cores

A motor includes a rotor fixed to a rotary shaft, a stator arranged so as to surround the rotor with a gap from the rotor in a radial direction orthogonal to an axis direction of the rotary shaft, and a case accommodating the rotor and the stator. The rotor includes a plurality of rotor cores made from a soft magnetic material, and a rotor fixing member that fixes the rotor cores. The stator includes a plurality of stator cores made from a soft magnetic material, a stator fixing member that fixes the stator cores, and coils wound around the stator cores, respectively. The motor includes at least two sets of the rotor and the stator, and the sets are stacked in an axis direction of the rotary shaft.

Motor

An electromagnetic steel sheet that can maintain satisfactory processability and thermostability, and exhibit a high space factor when used as, for example, a motor or transformer core material is provided. Such electromagnetic steel sheet comprises a coat containing an organic material provided on one outermost surface thereof, and a coat containing low-melting glass provided at least partially on the other outermost surface thereof. A motor core comprising such electromagnetic steel sheet is also provided. A method for producing such electromagnetic steel sheet and a method for producing such motor core are also provided.

Electromagnetic steel sheet

A manufacturing method for a rotor core included in a rotor of a motor punches an electromagnetic steel sheet includes punching a plurality of plates for rotor core from an electromagnetic steel sheet; producing a rotor-core precursor by stacking up the plates for rotor core; manufacturing a rotor core by annealing an outer circumferential region of the rotor-core precursor at a first predetermined temperature, and annealing an inner circumferential region of the rotor-core precursor at a second predetermined temperature; the first predetermined temperature being a temperature at which grain growth of crystals of the electromagnetic steel sheet is promoted; and the second predetermined temperature being a temperature at which grain growth of the crystals of the electromagnetic steel sheet is not promoted.

Manufacturing method for rotor core and manufacturing method for motor core

Provided is a compressed powder core that can suppress a decrease in the inductance even when a high magnetic field (of greater than or equal to 40 kA/m) is applied to the compressed powder core while suppressing an iron loss and a decrease in the strength of the compressed powder core. The compressed powder coreA has soft magnetic particlesA and aluminum nitride layersA formed on the surface layers of the respective soft magnetic particlesA. The compressed powder coreA has a ratio of the first differential relative permeability &#x3bc;'L to the second differential relative permeability &#x3bc;&#x2032;H satisfying a relationship of &#x3bc;&#x2032;L/&#x3bc;&#x2032;H&#x2264;6, and has a magnetic flux density of greater than or equal to 1.4 T when a magnetic field of 60 kA/m is applied. The soft magnetic particles of the compressed powder coreA contain Si in the range of 1.0 to 3.0 mass % and have, when analyzed using XRD, a peak area ratio Sal/Sfe of greater than or equal to 4%, the peak area ratio Sal/Sfe being the ratio of the area Sal of a peak waveform derived from AlN to the area Sfe of a peak waveform derived from Fe.

Compressed powder core, powders for compressed power core, and method for producing compressed powder core

A powder magnetic core having excellent specific resistance or strength. The powder magnetic core has soft magnetic particles, first coating layers that coat the surfaces of the soft magnetic particles and include aluminum nitride, and second coating layers that coat at least a part of the surfaces of the first coating layers and include a low-melting-point glass having a softening point lower than an annealing temperature for the soft magnetic particles. The first coating layers including aluminum nitride are excellent in the wettability to the low-melting-point glass which constitutes the second coating layers and suppress diffusion of constitutional elements between the soft magnetic particles and the low-melting-point glass of the second coating layers. The powder magnetic core can stably exhibit a higher specific resistance and higher strength than the prior art owing to such a synergistic action of the first coating layers and second coating layers.

Powder magnetic core, powder for magnetic cores, and methods of manufacturing them

A method of annealing a metal member includes: disposing a first heater in an inner space of a hollow cylindrical metal member having an inner peripheral surface provided with plural teeth protruding toward a central direction, the first heater radiating infrared light and being disposed so as to extend parallel to a direction of a central axis of the metal member; heating the metal member from the inner space with the first heater; and gradually cooling the metal member after heating.

Method of annealing metal member

A production method for a rotor for a permanent magnet-type rotary electric machine, includes the step (S, S) of forming a magnet piece that has a plurality of groove portions that are provided on at least one of end surfaces of the magnet piece in a predetermined direction, the step (S) of stacking a plurality of formed magnet pieces so that adjacent magnet pieces contact each other and the plurality of groove portions of one of the adjacent magnet pieces cross with the plurality of groove portions of another one of the adjacent magnet pieces, and the step (S) of inserting and disposing the plurality of stacked magnet pieces into a hole formed in a rotor core.

Permanent magnet-type rotary electric machine and production method for rotor for permanent magnet-type rotary electric machine

The present invention relates to the measurement of gasoline volatility characteristics, and is directed in particular to the provision of an ultrasonic-type gasoline characteristic determination method and apparatus capable of determining the volatility characteristics with good accuracy by measuring the velocity of an ultrasonic wave in a gasoline containing alcohol or other additives and by compensating for deviations from a reference temperature, and a method for determining gasoline volatility characteristics by using an ultrasonic wave is provided, comprising the steps of transmitting an ultrasonic wave into a gasoline being measured, measuring the velocity of the ultrasonic wave in the gasoline, and determining the volatility characteristics of the gasoline from the velocity.

Method and apparatus for determining gasoline characteristics by using ultrasonic wave

The present invention relates to a sensor for detecting the degree of deterioration of oil, and more particularly, provides an oil deterioration sensor which can detect the deterioration of oil and/or the liquid surface of oil by utilizing the fact that the sound velocity of ultrasonic waves change according to the alkalinity of the oil, the oil deterioration sensor for determining deterioration characteristics of oil by utilizing ultrasonic waves, which is characterized in that a deterioration sensor reflecting surface for reflecting ultrasonic waves transmitted from an ultrasonic wave transmitting portion is placed in oil so as to detect deterioration of the oil, and characterized by comprising: an oil deterioration detecting portion for evaluating a transmission velocity of an ultrasonic wave in the oil by receiving ultrasonic waves from the aforesaid deterioration sensor reflecting surface and for evaluating a degree of deterioration of oil from said transmission velocity of the oil.

Oil deterioration sensor

Method and apparatus for determining gasoline characteristics by using

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Toyota, Japan

Toshimitsu Takahashi