Nidec Corporation

Yokohama National University

National University Corporation Yokohama National University

Yoshinobu Nakamura

Masato Nakanishi

Takumi Okada

Yasuo Ishiyama

Yusuke Makino

Yosuke Yamada

Daisuke Ogasawara

Takaaki Bando

Yoshiki Kawai

Kazutoshi Matsuda

Shunichi Tanaka

Quing Yu

Tsutomu Furukawa

Tatsuya Noda

In an aspect of the motor of the present invention, the motor includes a shaft centered on a center axis extending in a predetermined direction, and a stator located radially outside of the shaft. The stator has a coil wound around the stator. The motor further includes a housing member having a substantially cylindrical shape with a bottom, where the housing member accommodates substantially the entire stator, and supports the shaft, a cooling medium with which the housing member is filled, where the stator and the coil is immersed in the cooling medium, and a rotor that rotates radially outside of the housing member with the center axis of the shaft as a rotation center.

Motor

A cooling device and a motor are provided. The cooling device that cools a heating element is provided with: a cooling chamber for cooling the heating element with a first cooling medium; a radiator chamber for releasing the heat of the first cooling medium to the outside; and a first connection path and a second connection path for connecting the cooling chamber and the radiator chamber. When part of the first cooling medium in the cooling chamber is gasified, at least part of the gasified first cooling medium moves into the first connection path, thus causing a circulation in which the first cooling medium in the cooling chamber flows into the radiator chamber via the first connection path, and the first cooling medium in the radiator chamber flows into the cooling chamber via the second connection path.

Cooling device and motor utilizing a heating element to circulate cooling

A motor includes a rotor, a stator having a cylindrical shape, disposed on a radial-direction outer side of the rotor, and surrounding the rotor, and a housing having a cylindrical shape, disposed on the radial-direction outer side of the stator, and housing the rotor and the stator. The stator includes teeth disposed along a circumferential direction and extending in a radial direction, and coils wound around the teeth. A hermetically sealed chamber filled with a cooling medium is provided between the housing and the rotor. A space housing the rotor core is provided on a radial-direction inner side of the sealed chamber that includes an inner chamber housing the coils, outer chambers disposed on the radial-direction outer side of the inner chamber and extend in the circumferential direction, and upper and lower connection portions located vertically above or below a shaft and connect the inner chamber to the outer chambers.

A motor includes a rotating shaft, a rotor, a stator, a bracket, and a control device mounted on the bracket. The bracket includes a cylindrical bracket main body, and a stator frame which faces the bracket main body across a clearance and holds an outer surface of the stator on the radially inward side of the bracket main body. The control device is mounted on the bracket main body. The bracket is provided with a cooling passage, and an inflow port and an outflow port connected with the cooling passage. The cooling passage includes a control device cooling passage provided between the bracket main body and the control device, a stator cooling passage provided between the bracket main body and the stator frame, and a communication passage coupling the control device cooling passage and the stator cooling passage.

An object of the present invention is to provide a motor which has a maintenance port and of which the wire is insusceptible to disturbance noise. The motor includes: a bracket housing a rotor and a stator; a control device housing part located on the radial direction outside of the bracket; a control device located inside the control device housing part; a sensor housing part located at the end of the bracket on the side opposite to an output end; a motor sensor mounted at the end of a rotating shaft on the side opposite to the output end; and a coupling connector connecting the motor sensor and the control device with each other. The control device housing part and the sensor housing part communicate with each other. The coupling connector is located inside the sensor housing part. The sensor housing part has a port which has an opening in the axial direction, and the port and the coupling connector at least partially overlap with each other in the axial direction.

A motor may include a stator having coil groups of plural phases and a connector, the stator comprising a plurality of split stators. Each of the split stators may include a split core having an arc-shaped core back section and a tooth section, an insulator, a coil which has a lead-out line that is connected to the connector. The insulator may have a first void extending between a first inner wall and a first outer wall. The first inner wall may have a lead-in groove. The stator may have a support ring disposed on the upper side of the first void. The support ring may have a second void extending between a second inner wall and a second outer wall. A plurality of lead-out lines of different phases may respectively accommodated in the first void and the second void.

Growing community of inventors

Kyoto, Japan

Yoshinobu Nakamura