Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Yasuji Echizen

Yuichi Yoshikawa

Takashi Ogawa

Yukihiro Okada

Masahiko Kobayashi

Hu Li

Tooru Nakamaru

Minoru Chamura

Masaaki Nishiyama

Mizuo Komine

Yukio Chihara

Yasuo Yonei

Shoichi Kubo

Keita Nakaguro

Satoru Watanabe

Yasuhiko Okuda

A motor stator of the invention is provided with a laminated stator core comprising a plurality of core pieces having teeth and linked by intermediate thin-wall portions. The thin-wall portions are bent to form the stator core into an annular shape with two ends of the stator core joined by welding, and slots are formed between adjoining pairs of the teeth. A welded portion of the stator core is not near a center line in a radial direction of any of the slots.

Motor stator and motor

In a core material according to the present invention, a predetermined number of core pieces, each having a tooth portion and a yoke portion, are connected to each other via connecting portions. Each of the connecting portions includes: a V-shaped notch portion; a through hole that is formed at a tapered portion of the notch portion with a diameter elongated in a connection direction; and a thin portion that is formed outside of the through hole and connects the core pieces to each other. The width of the thin portion is more increased apart from the axis of symmetry of two sides constituting the V shape of the notch portion, and further, an intersection between extension lines of the two sides constituting the V shape lies within 0.3 W from the inner side of the thin portion in a notch direction and within the thin portion when W designates the width of the thin portion along the axis of symmetry.

Core material, stator core, and motor provided with stator core

The N(s) turns of a first output winding is divided by a split ratio &#x3b1; into N(s) turns of a lower-layer first output winding and N(s) of an upper-layer first output winding. The lower-layer first output winding is continuously wound around all slots as the undermost layer. A second output winding is continuously wound around all slots over the lower-layer first output winding. An upper-layer first output winding is continuously wound around all slots over the second output winding. The split ratio &#x3b1; is adjusted only in the slots where the detection accuracy decreases. This equalize the contribution of the first output windings and the second output winding to the flux linkage, thereby achieving high angle detection accuracy.

Winding method and winding structure of stator for rotation detector, and electric motor comprising rotation detector

The N() turns of an output winding is divided by a split ratio &#x3b1; into N() turns of an output winding () and N() turns of an output winding (). The output winding () is continuously wound around all slots as the undermost layer. Output winding, which is different in phase by 90 degrees from the output winding (), is continuously wound around all the slots over the output winding (). An output winding () is continuously wound around all the slots over output winding. This equalizes the contribution of the output winding and output windingto the flux linkage, thereby achieving high angle detection accuracy.

Method and structure of winding of stator for rotation detector, and electric motor comprising rotation detector

A plurality of stator teethare arranged at a constant interval in a circumferential direction on the inner circumferential face side or the outer circumferential face side of a ring-shaped stator corethat is made of a plurality of steel plates. The winding wireis wound about the stator teeth. An insulatorthat electrically insulates the stator core and the winding wire is provided therebetween. A gapis formed between the winding wire and the insulator. Accordingly, a desired distance can be secured between the stator teeth and the winding wire regardless of the thickness of the insulator, and, thus, the influence of leakage magnetic fluxes that acts on the winding wire can be reduced. Accordingly, the influence of leakage magnetic fluxes formed near the stator teeth that acts on the winding wire can be reduced regardless of the thickness of the insulator.

Stator and electrical apparatus

A torque transmitter includes (a) a driver, (b) torque transmitting means for transmitting the torque generated by the driver to a follower, (c) a rotary body on the follower side, and (d) a torque reducer that reduces (or discontinues) the torque transmission when excessive torque over a threshold torque value is loaded to the rotary body on the follower side, and the torque limiter has different threshold-torque-values responsive to rotating directions of the rotary body.

Torque reducer and torque transmitter including the same

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Osaka, Japan

Yasuji Echizen