Nidec Corporation

Rohm Co., Ltd.

Yokohama National University

National University Corporation Yokohama National University

Masato Nakanishi

Yoshinobu Nakamura

Takumi Okada

Yasuo Ishiyama

Katsuhiko Yoshihara

Toru Takahashi

Masaki Yoshinaga

Quing Yu

Tatsuya Noda

Shunichi Tanaka

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 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.

Motor

A circuit element includes an upper switching device, a lower switching device, an upper diode device, and a lower diode device. An upper drain is connected to a first terminal connected to a positive electrode of a power supply, and an upper source is connected to a third terminal. A lower drain is connected to a fourth terminal, and a lower source is connected to a second terminal connected to a negative electrode of the power supply. An upper anode is connected to the fourth terminal, and an upper cathode is connected to the first terminal. A lower anode is connected to the second terminal, and a lower cathode is connected to the third terminal. The third terminal and the fourth terminal are arranged so as to be able to be short-circuited outside of a package.

Module, and power conversion apparatus and motor using the module

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.

Growing community of inventors

Kyoto, Japan

Masato Nakanishi