Mitsubishi Electric Corporation

Yokogawa Electric Corporation

Bunka Shutter Co., Ltd.

Takahiro Tsutsumi

Koji Yabe

Kazuhiko Baba

Tomoaki Oikawa

Hayato Yoshino

Yoshikazu Fujisue

Kazuya Kumagai

Kouichirou Shimamura

Naoto Takano

Noriaki Senba

Naoki Yasuda

Makoto Hirose

Yasuhiro Owaki

Shigeyuki Yamamoto

Yoshio Takita

Masashi Ono

Ken Miyamoto

Osamu Kazama

Hayato Izumi

Yukio Hidaka

Koji Nakashima

Koichiro Shimamura

Tsuneyoshi Tajima

Toshifumi Kanri

Hiroki Kuraishi

Hideki Fujimori

Kosuke Sano

Sadami Okugawa

Akiko Ishii

Masaru Oi

Yuriko Matsuoka

Nobuyuki Sugaya

Toru Uetake

A rotor core has first and second magnet insertion holes along an outer circumference, and first and second slits along an inner circumference. The first and second slits have first and second facing portions facing each other. The first facing portion has a first inner end and a first outer end. The second facing portion has a second inner end and a second outer end. An inter-slit portion is provided between the first and second facing portions and is defined by a first straight line connecting the first and second inner ends and a second straight line connecting the first and second outer ends. In a radial direction of the rotor core, a minimum distance Dfrom the inner circumference to the slits, a minimum width Wof the slits, and a length Wof the inter-slit portion satisfy at least one of D&#x3c;Wand D&#x3c;W

Rotor, motor, compressor, fan, and air conditioning apparatus

The present invention provides a solvent-free varnish composition, including: a thermosetting resin (A) having two or more (meth)acryloyl groups in a molecule thereof; a thermosetting resin (B) having one or more epoxy groups in a molecule thereof; a monofunctional vinyl-based monomer having an ether bond or an ester bond; an organic peroxide having a 10-hour half-life temperature of 40&#xb0; C. or more; and a curing catalyst for an epoxy resin, in which a mixed resin of the thermosetting resin (A) and the thermosetting resin (B) has an epoxy equivalent of from 500 to 5,000. The solvent-free varnish composition can be used as an insulating varnish that shows a small energy loss and requires a short curing time in its curing treatment step, and that provides a cured product that barely causes the precipitation of an oligomer or the like even when exposed to a refrigerant-based environment containing a refrigerant and a refrigerating machine oil under high temperature and high pressure.

Solvent-free varnish composition, insulated coil, process for producing same, rotating machine, and closed electric compressor

An electric motor includes a stator and a rotor including a permanent magnet and an electromagnetic steel sheet. The electromagnetic steel sheet includes a magnet insertion hole, a first outer peripheral surface including an inter-pole part of the rotor, a second outer peripheral surface including a magnetic pole center part of the rotor, a first slit elongated in a circumferential direction of the rotor, and a first portion formed between the first slit and the magnet insertion hole. A distance from the first outer peripheral surface to the stator is larger than a distance from the second outer peripheral surface to the stator. The electric motor satisfies &#x3b8;a&#x3c;&#x3b8;b, where &#x3b8;a is a first angle formed by a first line and a second line and &#x3b8;b is a second angle formed by a third line and the second line.

Electric motor, compressor, air blower, and air conditioner

A magnetizing method includes the steps of preparing a rotor comprising a rotor core having a magnet insertion hole and a permanent magnet provided in the magnet insertion hole, placing the rotor so as to face a tooth around which a winding is wound, rotating the rotor in a first rotating direction by a first angle &#x3b8;from a rotational position where a center of the magnet insertion hole in a circumferential direction of the rotor core faces a middle portion between both ends of the winding in the circumferential direction and supplying electric current to the winding, and rotating the rotor in a second rotating direction opposite to the first rotating direction by a second angle &#x3b8;from the rotational position direction and supplying electric current to the winding. The second angle &#x3b8;is smaller than the first angle &#x3b8;

Magnetizing method, rotor, motor, and scroll compressor

A rotor includes a rotor core having a magnet insertion hole and a permanent magnet provided in the magnet insertion hole. The rotor core has a slit on an outer side of the magnet insertion hole in a radial direction of the rotor core. The permanent magnet is magnetized by placing the rotor so as to face a tooth around which a winding is wound, rotating the rotor in a first rotating direction from a rotational position where a center of the magnet insertion hole in a circumferential direction of the rotor core faces a middle portion between both ends of the winding in the circumferential direction and supplying electric current to the winding, and rotating the rotor in a second rotating direction opposite to the first rotating direction from the rotational position and supplying electric current to the winding.

Rotor, magnetizing method, motor, and scroll compressor

A motor including a rotor, and a stator having a plurality of coils wound around slots, wherein at least any one of the coils includes a single aluminum wire, a single copper wire joined to the aluminum wire, a stranded wire (lead wire) joined to the copper wire, a cold-pressure-welded joint portion (joint portion) joined between the aluminum wire and the copper wire by cold pressure welding, and a non-pressure welded joint portion (joint portion) provided between the copper wire and the stranded wire (lead wire). A burr covered by an insulation member (insulation tube) is provided in the cold-pressure-welded joint portion (joint portion). A thickness of the insulation member (insulation tube) is larger than a height of the burr.

Motor, blower, and compressor

A rotor is connected to a shaft member and rotates about a central axis. The rotor includes a shaft hole having at least part of the shaft member disposed therein; and flow paths disposed around the shaft member and penetrating the rotor in a direction parallel with the central axis. Each flow path has a first surface facing outward in the radial direction; a second surface disposed outward of the first surface in the radial direction and facing the first surface; a third surface connecting the first and second surfaces at one end in a rotational direction about the central axis; a fourth surface connecting the first and second surfaces at the other end in the rotational direction. The condition C&#x3c;D is satisfied, where C is the distance between both ends of the first surface, and D is the distance between both ends of the second surface.

Rotor, electric motor, compressor, and blower

An electronic device includes a base plate, and a plurality of modules detachably attached to the base plate. The modules comprise a terminal block module. The terminal block module has an openable and closable door at a pullout end portion-side. The door has an attribute information display part configured to display attribute information of a device to be connected to the terminal block module.

Electronic device having an attribute information display part

An electronic device includes a base plate, a plurality of modules detachably fitted and connected to the base plate, a plurality of mounting members configured to detachably mount the base plate to a DIN rail, and an operation lever provided on the base plate and configured to be engaged with the mounting members and to be operable from a front surface of the base plate. When the operation lever is operated, an engaged state between the mounting members and the DIN rail is released.

Electronic device

In an induction motor, when dimensions of respective elements of a rotor slot are defined as

Induction motor, compressor, air blower, and air conditioner

Base plate

A rotor of an induction motor according to the present invention is a rotor including a squirrel-cage secondary conductor, wherein the rotor slot is constituted by an outer circumferential slot formed near an outer circumference of the rotor and an inner circumferential slot communicating with the outer circumferential slot and formed inside of the outer circumferential slot, a circumferential width TC of an innermost circumference of the outer circumferential slot is smaller than a circumferential width TD of an outermost circumference of the inner circumferential slot, and a circumferential width of the outer circumferential slot is smaller as the outer circumferential slot approaches to the outer circumference of the rotor.

Rotor of induction motor, induction motor, compressor, air blower, and air conditioner

The efficiency of an induction motor is improved while suppressing the generation of magnetic flux saturation of a rotor core. In an induction motor, 'a magnetic path width of a rotor' which is the product of a circumferential width of a rotor tooth formed in the rotor and the number of rotor teeth is equal to or larger than 'a magnetic path width of a stator' which is the product of a circumferential width of a stator tooth formed in the stator and the number of stator teeth.

Induction motor, compressor and refrigerating cycle apparatus

An induction motor includes a stator having a winding to be inserted to a plurality of stator slots formed along an inner circumferential edge of a stator iron core; and a rotor placed inside of the stator via a gap, the rotor includes a plurality of double squirrel-cage rotor slots formed along an outer circumferential edge of the rotor iron core and filled with conductive material and at least three air hole parts provided around a rotating shaft hole of the rotor iron core to which the rotating shaft is fitted and having an opening which is open to the rotating shaft hole; and an inner diameter part of the end ring which short circuits both edges of the conductive material filled to the double squirrel-cage rotor slot is placed to be adjacent to the air hole part in at least the end ring of one side.

Growing community of inventors

Tokyo, Japan

Takahiro Tsutsumi