Mitsubishi Electric Corporation

Mitsubishi Generator Co., Ltd.

Mitsubishi Elextric Corporation

Hiroki Aso

Hiroyuki Ishii

Junichiro Oya

Mineo Yamamoto

Yuto Urabe

Takaya Shimokawa

Ryogo Takahashi

Tomoaki Oikawa

Kazunori Sakanobe

Takanori Watanabe

Kazuma Nomoto

Mamoru Kawakubo

Atsushi Matsuoka

Naoki Tamura

Kazuhiko Baba

Michio Yamada

Kazunori Hatakeyama

Koji Yabe

Noriaki Matsunaga

Yosuke Shinomoto

Takuya Shimomugi

Kazuchika Tsuchida

Junichi Ono

Yasumasa Takeuchi

Tomoyuki Hasegawa

Katsumi Shibayama

Hitoshi Mochizuki

Yoshiyuki Takashima

Shigeru Matsuda

Kazuya Omura

Daisuke Morishita

Seijiro Muramatsu

Kota Hosaka

Togo Yamazaki

An electric motor includes: a stator; a rotor; and a built-in board that supplies current to the stator, wherein the built-in board includes: a high-voltage circuit connected to a high-voltage power supply; and a low-voltage circuit connected to a low-voltage power supply, the high-voltage circuit includes an inverter that converts an input direct-current voltage into an alternating-current voltage and supplies the alternating-current voltage to the stator, the low-voltage circuit includes a control unit that controls the inverter, and an inductor is disposed on a low-voltage power-supply line that is a line connecting the low-voltage power supply and the low-voltage circuit.

Electric motor, air conditioner, and control board

A repair method of a stator iron core which has a slot for accommodating a stator coil, and is formed by laminating silicon steel sheets. The method is implemented by moving a part of the silicon steel sheets which form the stator iron core while holding the stator coil in the slot to form a gap between the laminated silicon steel sheets of the stator iron core in the existence of a damaged part, and adding an insulation to the damaged part of the silicon steel sheet from the gap formed between the laminated silicon steel sheets to repair the damaged part of the silicon steel sheet.

Repair method of stator iron core

A rotor includes a rotary shaft and a rotor body supported by the rotary shaft. The rotor body includes a first permanent magnet and a second permanent magnet. The first permanent magnet has a first overhang part that is in contact with a first end part of the second permanent magnet in an axial direction of the rotary shaft, and the first overhang part and the first end part are joined to each other. A motor includes the rotor and a stator.

Rotor, motor, blower, air conditioner, and manufacturing method of rotor

A motor includes a rotor and a stator. In a plane orthogonal to an axis direction of the rotor, the motor satisfies W<W<Mand T<W<T×Twhere Mis a width of a surface of a permanent magnet, Wis a maximum width of a portion of an inner wall of a first magnet insertion hole in contact with the surface, Wis a minimum width from the first magnet insertion hole to a second magnet insertion hole, Tis a width of a first front end surface of a first tooth, and Tis a width from the first front end surface to a second front end surface of a second tooth.

Motor, fan, and air conditioner

A motor includes a rotor having a shaft, a rotor core, and a permanent magnet, and a stator surrounding the rotor. The permanent magnet forms a magnet magnetic pole, a part of the rotor core forms a virtual magnetic pole. The motor includes first and second bearings support the shaft, and further includes first and second bearing support portions. Of the first and second bearings, the first bearing is located on the load side. A distance Dfrom the center axis to the inner circumferential surface of the first bearing support portion, a distance Dfrom the center axis to the inner circumferential surface of the second bearing support portion, a distance dfrom the center axis to the outer circumferential surface of the first bearing, and a distance dfrom the center axis to the outer circumferential surface of the second bearing satisfy D−d<D−d

A rotor includes a plurality of cores stacked in an axial direction, a permanent magnet, and a nonmagnetic resin. The plurality of cores include a magnet insertion hole, a first opening communicating with one end of the magnet insertion hole in a circumferential direction, and an indent part communicating with the first opening and indented in the circumferential direction. The permanent magnet is disposed in the magnet insertion hole. The nonmagnetic resin is provided in the first opening and the indent part.

Rotor, electric motor, fan, and air conditioner

A motor includes a rotor having a rotation shaft and a bearing mounted to the rotation shaft, a stator surrounding the rotor, a heat dissipation member provided on one side of the rotor in an axial direction of the rotation shaft, and a resin portion covering the stator and at least a part of the heat dissipation member. The heat dissipation member has a first concave portion surrounding the bearing from an outer side in a radial direction about the rotation shaft, and a second concave portion famed on an inner side of the first concave portion in the radial direction.

Motor, fan, air conditioner, and manufacturing method of motor

A rotor includes: a resin magnet including a first magnetic flux generating part and a second magnetic flux generating part; and a shaft fixed to the resin magnet. The first magnetic flux generating part has a first orientation. The second magnetic flux generating part has a second orientation different from the first orientation in a radial direction. A peak of magnetic flux density from the first magnetic flux generating part is larger than a peak of magnetic flux density from the second magnetic flux generating part.

Rotor, motor, fan, air conditioning apparatus, and method for manufacturing rotor

A rotor includes a shaft made of a stainless steel, an annular rotor core surrounding the shaft from an outer side in a radial direction about a center axis of the shaft, a magnet attached to the rotor core, and a separating portion provided between the shaft and the rotor core and having electric insulation property. The magnet constitutes a first magnetic pole, and a part of the rotor core constitutes a second magnetic pole. The rotor core has an inner circumference facing the shaft and an outer circumference opposite to the inner circumference. A radius R1 of the shaft and a maximum distance R2 from the center axis to the outer circumference of the rotor core satisfy R1/R2≥0.20.

Rotor, motor, fan, air conditioner, and manufacturing method of rotor

A motor includes a rotor, a stator, a circuit board attached to the stator, a heat dissipation member disposed on a side of the circuit board opposite to the stator, and a resin portion covering the stator, the circuit board, and at least a part of the heat dissipation member.

A motor includes a rotor and a stator provided to surround the rotor. The rotor has a rotor core having a magnet insertion hole and a permanent magnet disposed in the magnet insertion hole and is rotatable about a rotation axis. The stator has a stator core with a tooth facing the rotor, and a coil wound around the tooth. The permanent magnet has a thickness thicker than or equal to 2.1 mm in a direction in which the permanent magnet faces the stator and is magnetized in a direction of the thickness. A minimum gap AG (mm) between the rotor and the stator, a winding number Nt of the coil around the tooth, an overcurrent threshold Ip (A) for a current flowing through the coil, and a lower limit Hct (kA/m) of a coercive force of the permanent magnet satisfy Hct≥0.4×(Ip×Nt/AG)+410.

Motor that suppresses demagnetization of permanent magnet, fan, and air conditioner

A rotating machine includes: an electric motor that includes a stator and a rotor that is rotatable relative to the stator; a rotary member to be rotated that is provided on the shaft; and a fastening member made of magnetic material and provided to fasten the rotary member to a shaft. The rotor includes: a rotor core made of magnetic material; a plurality of permanent magnets attached to the rotor core such that the permanent magnets are spaced from each other in a circumferential direction and magnetic poles of the permanent magnets that face an outer peripheral side of the rotor core in a radius direction of the rotor core have the same magnetic polarity; and the shaft. The shaft is made of magnetic material, provided to extend through a central part of the rotor core in an axial direction of the rotor core, and magnetized by part of magnetic fluxes generated from the permanent magnets.

Rotating machine, outdoor unit of air conditioning apparatus, and air conditioning apparatus

A stator includes a first core that includes a first tooth extending in a first radial direction and a first core back extending in a circumferential direction and a second core that includes a second tooth extending in a second radial direction and a second core back extending in the circumferential direction. The first core back includes a depression formed with at least a first face and a second face in an outer peripheral surface of the first core back and a connection part facing the second core back. The stator satisfies θ1<θ2, where θ1 represents an angle between the first face and the first radial direction and θ2 represents an angle between the second face and the first radial direction.

Stator, motor, fan, air conditioner, and method for manufacturing stator

A rotor includes at least one first permanent magnet and at least one second permanent magnet. The at least one first permanent magnet forms part of an outer peripheral surface of the rotor and is magnetized to have polar anisotropy. The at least one second permanent magnet is adjacent to the at least one first permanent magnet in a circumferential direction of the rotor and has lower magnetic force than magnetic force of the at least one first permanent magnet.

Rotor, electric motor, air blower, air conditioner, and method for fabricating rotor

A motor has a sufficient heat dissipation function even when a non-magnetic material having low thermal conductivity is used for a shaft of a motor using a consequent pole rotor. A motor includes: a stator; a consequent pole rotor including a rotor core and a magnet; a casing housing the stator and the rotor; a shaft including a non-magnetic material and fixed to the rotor; and heat dissipation blades that are a first heat dissipation promoting means that rotates with the shaft. This promotes heat dissipation through a heat dissipation path from an inside of the motor through the shaft, preventing problems due to overheat in the motor.

Growing community of inventors

Tokyo, Japan

Hiroki Aso