Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Seiji Haga

Masayoshi Tamura

Kazuki Iwasa

Yoshifumi Ajioka

Tetsuya Sakurada

Kenichi Nakagawa

Tadashi Maeda

Kenta Kaneko

Satoshi Ishibashi

Kazuki Sakata

Shigenobu Tochiyama

Yosuke Kikuchi

Shinsuke Idenoue

Kiyoshi Horiuchi

Nobuhiro Kanei

Naoto Himura

Kazuto Minagawa

Kenji Sonoyama

Shunsuke Kosaka

Masasi Sakai

Hideki Goto

Masayosi Tamura

Noriyuki Tani

An electric motor includes a shaft, a rotor, a stator, a first bracket, a second bracket, a bypass definer, a first guide, and a second guide. The bypass definer defines an internal air bypass located radially outward from the stator for internal air to flow through. The first guide transfers heat transferred from the internal air passing through inside a plurality of first partition walls connecting the internal air bypass and an internal space to external air and guides the external air to an external air passage. The second guide transfers heat transferred from the internal air passing through inside a second partition wall connecting the internal air bypass and an internal space to the external air and guides the external air outside.

Electric motor

An electric motor includes a shaft supported rotatably about a rotation axis, a rotor located outward from the shaft in a radial direction of the shaft and rotatable integrally with the shaft, a stator facing the rotor in the radial direction, and a first bracket including an inlet to draw air into the electric motor from outside. The electric motor further includes a fan rotatable integrally with the shaft and having a first through-hole at a position facing a position inward from the inlet in the first bracket in the radial direction, and a first guide being cylindrical and facing the first bracket.

Electric motor having fan with through-hole and cylindrical guide facing bracket

A frame of an electric motor has inlet holes to allow ambient air to flow into an inside of the motor and outlet holes to allow the ambient air entering through the inlet holes to flow out to an outside of the motor. The motor includes a shaft, a rotor, a stator, a fan to rotate integrally with the shaft, and a guide. The guide is disposed outwardly of the fan in the radial direction and has a shape for suppressing foreign materials contained in the ambient air entering through the inlet holes from coming into contact with the stator and the rotor.

A first bracket in an electric motor includes an inflow path through which outside air flows inside, and an outflow path through which the air having flowed in flows outside. A stator core included in the electric motor includes a first ventilation path that is coupled with the inflow path and a second ventilation path that is coupled with the outflow path. A second bracket includes a third ventilation path that forms a flow path from the first ventilation path to the second ventilation path positioned symmetrically to the first ventilation path with respect to a plane containing a rotation axis. The air having flowed into the inside of the electric motor through the inflow path passes, in order, through the first ventilation path, the third ventilation path, and the second ventilation path, and flows out to the outside of the electric motor through the outflow path.

A frame included in an electric motor has an inflow hole that allows outside air to flow in an interior of the electric motor and an outflow hole that allows the outside air having flowed in to flow out of the electric motor. The electric motor includes a first partition member forming a first ventilation path between the first partition member and the frame, and a second partition member forming a second ventilation path between the second partition member and the frame. In addition, the stator has a third ventilation path penetrating through the stator from one end to another end of the stator in a direction of a rotational axis and configured to communicate with the first ventilation path and the second ventilation path.

Ventilation structure for air cooling of electric motor

There is provided a heat sink in which the thermal resistance from a portion where the heat sink directly or indirectly makes contact with a heat-generating device to a portion where the heat sink makes contact with a coolant is set to be a value that is different from the thermal resistance at a different position in the flowing direction of the coolant, so that it is made possible to suppress the temperature difference between the upstream end and the downstream end of the heat-generating device.

Liquid-type cooling apparatus and manufacturing method for heat radiation fin in liquid-type cooling apparatus

A vehicular cooling device includes an opening, a discharge port, an air channel, and a fan. The opening is formed in a surface parallel to a travelling direction of a vehicle. The discharge port is formed in a surface of the housing and connected to the opening via the air channel. The fan is provided inside the air channel. First blockers are spaced apart in the travelling direction in the opening. Each first blocker extends in a direction perpendicular to both the travelling direction and an inflow direction of the outside air, and includes first and second members. The first member is a plate-like member having a main surface intersecting the travelling direction. The first member and the second member are symmetric with respect to a plane perpendicular to the travelling direction, and have a travelling-direction spacing therebetween that increases along the inflow direction of the outside air.

Vehicular cooling device

A liquid coolant supplying header is configured on a central portion in the width direction between an upper portion heatsink and a partitioning plate, a liquid coolant discharging header is configured on a central portion in the width direction between a lower portion heatsink and the partitioning plate so as to be parallel to the liquid coolant supplying header, vertical flow channels are formed so as to pass through the partitioning plate vertically on two sides in the width direction so as to be parallel to the liquid coolant supplying header, a liquid coolant distributing structural body is disposed inside the liquid coolant supplying header, and an external shape of the liquid coolant distributing structural body is formed such that flow channel cross-sectional area of the liquid coolant supplying header becomes gradually smaller from an upstream end toward a downstream end.

Cooling apparatus having vertical flow channels

There are provided a heat transfer parthaving heat-receiving surfacesandwhich have curved surface shapes along side surfacesandof a stemand a cylindrical partand in which the stemand the cylindrical partcan be fitted, and heat-dissipating surfacesandprovided with projected and retracted portionsand; and a casinghaving the optical distributorand the heat transfer partmounted thereon, and having heat-receiving surfacesandprovided with projected and retracted portionsandengaged with the projected and retracted portionsand

Heat dissipation structure and optical transceiver

The cooling device comprises a heat exchange unit provided in a cooling water flow path. The heat exchange unit has a plate part in the form of a plate and multiple fins erected on the plate face of the plate part, and provided in the manner that the plate face of the plate part extends along the cooling water flow path and the cooling water runs through the space between the fins. The multiple fins are each in the form of a rhombic column and provided on the plate part in a lattice pattern in the manner that the longer diagonal of the rhombic column extends along the cooling water flow path.

Cooler and cooling device

The totally-enclosed fan-cooled motor includes the stator; the rotor; the drive side bracket; the counter drive side bracket; a pair of the bearings; the external fan that sends cooling air to the stator; the internal fan; the heat radiator that is arranged on an outer side of the drive side bracket and is mounted on the rotation shaft; the cover that contains a joint, which connects the rotation shaft extending to an outer side of the drive side bracket of the motor and a reduction gear, and is provided in parallel with the joint; and the ventilation path that is arranged between the drive side bracket and an end of the cover, and includes the outlet causes the cooling air induced by rotation of the heat radiator to flow to the heat radiator and discharges the cooling air outside the motor.

Totally-enclosed fan-cooled motor

In a totally-enclosed fan-cooled motor wherein a drive side of a rotation shaft and a side opposite to the drive side are held by means of bearings and so that drive power would be transmitted from the drive side of the rotation shaft with which a rotor is formed into one body, wind is sent to an outer side of the motor in an axial direction of the rotation shaft by means of an external fan provided on the side opposite to the drive side to cool a stator in the air-tightly closed motor and air in the motor is circulated by means of an internal fan provided in the motor to cool a rotor, provided is a radiator mounted to the rotation shaft so as to be located on an outer side of the bearing holding the drive side of the rotation shaft, outside the motor, and in the vicinity of the bearing. This allows a cooling effect of the bearing provided on the drive side to be improved.

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Tokyo, Japan

Seiji Haga