Mitsubishi Electric Corporation

Masaki Horii

Takeru Okabe

Yasufumi Ogawa

Shiro Yonezawa

Nozomu Kamioka

Tomohisa Shoda

Osamu Ishikawa

Masaya Inoue

Yoshiaki Kitta

Hiroyuki Higashino

Manabu Yoshinori

Atsushi Sakaue

Koichi Ojima

Toshiya Chazono

A rotary electric machine includes: an annular cooling oil channel that is configured inside an externally mounted frame so as to face axially toward coils that are arranged in an annular shape and such that a surface that faces the coils is made into an opening; an oil pump; a nozzle that sprays cooling oil that is conveyed under pressure from the oil pump into the cooling oil channel from above; and a plurality of oil flow direction changing projections that are respectively disposed inside the cooling oil channel and are arranged circumferentially so as to face gaps between the coils and such that cooling oil receiving surfaces face upstream in a direction of flow of the cooling oil so as to change the cooling oil that flows through the cooling oil channel to an axial flow so as to be supplied to the gaps between the coils.

Rotary electric machine

Ventilation apertures are respectively formed circumferentially so as to pass axially through an inner circumferential side of a rotor core, rotor grooves are respectively formed circumferentially on an outer circumferential surface of the rotor core so as to have groove directions in an axial direction, and a centrifugal fan is fixed to the shaft at an end of the rotor core near the front frame, and a cyclic path is formed in which, during operation of the centrifugal fan, cooling air flows into the ventilation apertures from near a rear frame, passes through the ventilation apertures and flows out near the front frame, flows radially outward near the front frame and flows into the rotor grooves, passes through the rotor grooves and flows out near the rear frame, and flows radially inward near the rear frame and flows into the ventilation apertures.

Embedded permanent magnet rotary electric machine

Winding bodies are produced by repeatedly winding a &#x3b4;-shaped coil pattern that is formed by inserting the conductor wire sequentially into a second slot, a first slot, a second slot, and a third slot, so as to alternate an axial direction of insertion into the first slot, the second slot, and the third slot, for two turns in a radial direction, and are configured such that a plurality of rectilinear portions that are respectively inserted into the first slot, the second slot, and the third slot are linked continuously by coil end portions, and a liquid coolant is supplied to a coil end that is constituted by the coil end portions.

A coolant flow channel is formed so as to pass axially through a rotor core radially inside magnet housing apertures, a linking flow channel is formed so as to have a flow channel width that is narrower than a maximum flow channel width of the coolant flow channel, so as to link the coolant flow channel and the magnet housing apertures, and so as to pass axially through the rotor core, and permanent magnets are fixed to an inner wall surface of the magnet housing apertures by an adhesive that is disposed only between a wall surface of the permanent magnets that is positioned on a radially outer side and the inner wall surface of the magnet housing apertures so as to expose a region of a wall surface of the permanent magnets that is positioned on a radially inner side that faces the linking flow channel.

Rotor with embedded permanent magnet having adhesive on one side and cooling channels on the other side

A permanent magnetis housed in a magnet housing aperture, an adhesive is disposed only between an outside wall surfacethat is positioned on a radially outer side of an inner wall surface of the magnet housing apertureand an outside surfacethat is positioned on a radially outer side of a surface of the permanent magnetsuch that the permanent magnetis fixed so as to be closer to the outside wall surface, and a cooling flow channelthrough which a coolant is made to flow is formed by an inside surfacethat is positioned on a radially inner side of the surface of the permanent magnetand an inside wall surfacethat is positioned on a radially inner side of the inner wall surface of the magnet housing aperture

A coolant flow path structure which cools a rotor is configured of a first coolant flow path forming a radial coolant flow path of the rotor and a second coolant flow path communicating with the first coolant flow path and forming an axial coolant flow path of the rotor, and a negative pressure structure, which brings an exist of the coolant flow path structure into a negative pressure as a result of a rotation of the rotor, is provided at the exit of the second coolant flow path.

Rotating electric machine

Provided is an electric motor having improved overall cooling efficiency by enabling a coolant to flow around a stator and around and through a rotor in parallel for the stator and the rotor to allow the stator and the rotor to be cooled in parallel. In the electric motor, after an automatic transmission fluid flowing into a first coolant inflow port () passes through a shaft internal flow path and rotor internal flow paths (), the automatic transmission fluid passes through a coolant exhaust port () to flow out of a housing (). After the automatic transmission fluid flowing into a second coolant inflow port () passes through a clearance () between the housing () and a stator () and around coil ends () of stator coils (), the automatic transmission fluid passes through the coolant exhaust port () to flow out of the housing ().

Rotating electric machine and method of operating the same

A permanent magnet embedded rotary electric machine includes: permanent magnetsrespectively accommodated in the magnet accommodation holes. In the magnet accommodation hole, a portion of each permanent magnetcorresponding to the radially outer side of the rotor iron coreis fixed to the rotor iron core, and a refrigerant passageis formed, in a shaft direction of the rotor iron core, between the rotor iron coreand a portion of the permanent magnetcorresponding to the radially inner side of the rotor iron core. Protrusionsare provided, perpendicularly to a passing direction of a refrigerant, on an exposed portionof the rotor iron corein the refrigerant passage

Permanent magnet embedded rotary electric machine

An electric power controller for a vehicle with stop-start system is provided to prevent electric energy from being decreased in a power capacitor when an engine is in an idle-stop state. The engine is in the idle-stop state by idle-stop control means, the transfer of the electric energy between the power capacitor and a vehicle-mounted battery is stopped by power control means connected between the power capacitor and the vehicle-mounted battery.

Electric power controller for vehicle with stop start system

A clutch control unit includes a clutch motor controller that controls a clutch motor. The clutch motor controller has a target clutch motor current computing unit that computes a target clutch motor current for adjusting torque of the clutch motor to be torque corresponding to an operating state of the vehicle, and a motor driving and braking selection unit that selects a motor driving mode in which the clutch motor is driven by applying feedback control on an output of the clutch motor or a motor braking mode in which the clutch motor is braked by short-circuiting the clutch motor according to a difference between the target clutch motor current and an actually detected clutch motor current. It thus becomes possible to provide a control system of a transmission that engages a clutch by a motor braking force in a manner that suits the running state of the vehicle.

Control system of transmission

A full charge control apparatus includes a temperature detection accuracy decision unit and a full charge decision unit. The temperature detection accuracy decision unit detects an engine speed, a vehicle speed and an ambient temperature and, based on these surrounding conditions, determines whether the difference between the temperature of the battery estimated from a measurement by a temperature sensor and a true battery temperature falls within a specified accuracy range. If the battery temperature measurement accuracy is not within the specified range, the criteria for judging the fully charged state of the battery are modified to ensure that the battery will not be under-charged.

Full charge control apparatus for onboard battery

A control device of an automatic transmission includes a motor control portion to control an output of a motor that executes a control operation on a clutch control portion. The motor control portion includes a target motor current computation portion that computes a target motor current according to a desired driving state, a motor current detection portion that detects plural motor currents respectively corresponding to plural detection timings, a selection portion that selects a motor current corresponding to the desired driving state among the detected plural motor currents, and a motor driving portion that applies feedback control on an output of the motor according to a difference between the target motor current and the selected motor current. Hence, not only can the most suitable clutch control be applied for each gear-change interval at gear change, but also the comfortable feeling during the driving and the fuel efficiency can be enhanced.

Control device and control method of automatic transmission

A control device of a transmission is capable of instantaneously correcting a torque shortly after starting a motor, and properly correcting a gear operation shortly after starting (at transient time) even in case of coil temperature change. The device includes a gear change end determination unit, a motor stop determination unit, and a coil resistance estimation unit of estimating a coil resistance of the motor alternately by repeating at regular intervals a state of application of a predetermined voltage to the motor during stop before start of gear change and a state of no application; and when the motor is determined stop by the determination units, an initial value of a command voltage to be applied to the motor after start of gear change is corrected in a predetermined time period in accordance with a coil resistance value having been calculated by the coil resistance estimation unit.

Control device of automatic transmission

When a gear change has been decided, the coil resistance value of a motor which manipulates the transmission is measured. The coil temperature of the motor is estimated from the measured coil resistance value of the motor. In a case where the estimated coil temperature of the motor has been decided to be a predetermined temperature or above, the speed change inhibition time period of the transmission is calculated, and the speed change of the transmission is inhibited during the calculated speed change inhibition time period.

Control apparatus for transmission

An automatic transmission control apparatus secures the safe operation of a motor drive through the use of a voltage determination unit that determines which one of a voltage detected by a control apparatus voltage detection unit and a voltage detected by a motor voltage detection unit is to be utilized as a duty reference voltage. The motor control apparatus controls the motor, based on a motor drive duty that a drive duty calculation unit calculates by use of the voltage selected by the voltage determination unit.

Growing community of inventors

Chiyoda-ku, Japan

Masaki Horii