Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Mitsubishi Electric Company

Hiroshi Yamabuchi

Yuji Kuramoto

Ryoji Nishiyama

Akira Yamada

Hirotoshi Maekawa

Hiroshi Chiba

Tetsuro Ogushi

Toru Kimura

Satoshi Ishibashi

Katsuhisa Kodama

Katsuji Matsuoka

Shinichi Honma

A power conversion apparatus comprising a basewhich includes a first fixation portionand a second fixation portionthat are coupled to each other at a desired angle, wherein power modules IPM, IPMand IPMare fixed on the first fixation portionof the base, a control circuit boardis fixed with its first principal surfaceheld in direct or indirect touch with the second fixation portionof the base, and components constituting a control circuit are packaged on the second principal surfaceof the control circuit board. Owing to the configuration, a versatility for the installation of the power conversion apparatus on a vehicle becomes high, the vibration-proofness of the control circuit board is enhanced, and heats generated by the electronic components, etc. packaged on the control circuit board are sufficiently emitted.

Power conversion apparatus

A power conversion apparatus comprising a base which includes a first fixation portion and a second fixation portion that are coupled to each other at a desired angle, wherein power modules are fixed on the first fixation portion of the base, a control circuit board is fixed with its first principal surface held in direct or indirect touch with the second fixation portion of the base, and components constituting a control circuit are packaged on the second principal surface of the control circuit board. Owing to the configuration, a versatility for the installation of the power conversion apparatus on a vehicle becomes high, the vibration-proofness of the control circuit board is enhanced, and heats generated by the electronic components, etc. packaged on the control circuit board are sufficiently emitted.

A cooling system of a power semiconductor module of the invention includes a temperature detection sensor provided in a semiconductor element as a heat source provided in a power semiconductor module, and a controller which estimates a change of a heat transfer coefficient from the power semiconductor module to cooling water based on output information Tj of the temperature detection sensor and drive output information Sr of a rotation speed detection sensor for a pump motor to drive a cooling pump, controls the pump motor according to this estimated result, and controls cooling capacity of the cooling water.

Cooling system of power semiconductor module

A low-cost heat sink easy to assemble which is designed to be mounted on a power semiconductor module () through the medium of cooling water includes a base member (), a heat sink body () superposed on the base member () to form in cooperation with the base member () a passage through which the coolant flows, and a bellows-like flow straightening plate () disposed between the power semiconductor module () and the base member () in physical contact with the power semiconductor module () on one hand and with the base member () on the other hand. The flow straightening plate () partitions the passage into a plurality of flow straightening channels (A,B).

Heat sink

A power unit device which can be made small, with which special measures of plant and labor at the time of assembly are unnecessary, and of which assembly is easy and universality in its manufacturing aspect is excellent. The power unit device has a heat sink having a first heat-receiving part and formed on the opposite side from this a second heat-receiving part; a power module, in firm contact with the first heat-receiving part, containing a power semiconductor element for performing DC-AC conversion and/or AC-DC conversion for one phase; a smoothing condenser, in firm contact with the second heat-receiving part, for suppressing ripple current of the power semiconductor element; and fixing means passing through the power module, the heat sink and the smoothing condenser.

Power unit device and power converter device

A vehicle periphery monitoring device includes a transmitting circuit for generating a transmission wave, an antenna installed on the periphery or in the interior of a door mirror of a subject vehicle for radiating the transmission wave generated from the transmitting circuit as a formed beam having a directivity which propagates over a region expanding over an adjacent lane area from side portions of the subject vehicle toward the rear portion thereof, a receiving circuit for receiving a reflected wave from an object which is in the periphery of the subject vehicle through an antenna , an arithmetically operating circuit for arithmetically operating a distance between the subject vehicle and the object on the basis of a period of time required since the transmission wave generated from the transmitting circuit is radiated from the antenna until the transmission wave is reflected by the object and received by the receiving circuit and arithmetically operating a relative velocity from Doppler frequency of a received electric wave or a value of differential from an arithmetically operated distance to judge the risk of collision with the object on the basis of those arithmetically operated results, and LEDs and for announcing the judgement result of the arithmetically operating circuit to a driver in response to the risk.

Vehicle periphery monitoring device

The present invention provides a very practical monitor for monitoring the periphery of a vehicle characterized in that: the dimension of the monitor in the vertical direction is small, so that the monitor can be incorporated into a small vehicle without putting any restrictions; and the performance and characteristic are excellent. The present invention discloses a specific mechanism to realize the monitor for monitoring the periphery of a vehicle. The present invention provides a monitor for monitoring the periphery of a vehicle comprising: a radiating means for radiating waves of light, having an optical system means for removing astigmatic difference of a light source; and an optical path changing means including a reflection mirror for reflecting a luminous flux radiated from the radiating means in a direction of the radiated light diffusing means. It is possible to change the optical path while astigmatic difference of the light source is being corrected.

Monitor for montoring periphery of vehicle

A radar system,is integrally accommodated in, for example, a door mounted exterior mirror case, wherein electromagnetic waves are emitted from a transmitting antenna,to an area of a right side and a backside of a driver's own vehicle; the electromagnetic waves reflected by objects are received by a receiving antenna,thus received waves are amplified by a receiving circuit,a Doppler frequency is measured; a situation of danger or safety is judged along with calculations of ranges and relative velocities from the objects in an operating circuit,a result of the judgement is displayed by LED,and a predetermined alarm and control is performed by a control circuit,equipped in a body of the own vehicle, based on information from the operating circuit,whereby detection of vehicles especially existing in an area being difficult for a driver to observe from a door mounted exterior mirror, for example that on a right back side of the own vehicle, are aided to detect.

Device for monitoring surroundings of vehicle

Vehicular optical radar apparatus adapted to enhance actual operating efficiency in causing emitted light to continuously scan in a horizontal direction with a diffusing-angle setting device (44) for setting a diffusion angle (.alpha.) to be used for diffusing the emitted light in a vertical direction. This vehicular optical radar apparatus further comprises light receiving devices (60 to 90) that is held in such a manner as to be placed at a horizontally predetermined relative position and that is used to receive reflected light (L2) from an object, a distance computing device for computing a distance from the vehicle to the object according to a delay time between a moment, at which the emitted light is generated, and a moment at which the reflected light is received, and a direction detecting device for detecting a direction of the object according to a direction in which the emitted light is outputted when the reflected light is obtained. In this apparatus, the horizontal scanning device includes an optical system employing a prism and is operative to cause a luminous flux of the emitted light to scan continuously in a horizontal direction by transmitting and refracting the emitted light by means of the prism while rotating the prism.

Vehicular optical radar apparatus

An optical radar apparatus, having a structure such that light generated by a laser generating means 1 is emitted to an object 100 while scanning the same, light reflected by the object 100 is reflected by a reflected-light reflecting means 10, and then a parabolic mirror or a concave mirror 19 receives reflected light above, is arranged to have a light receiving device 20 disposed at the position of the focal point of the parabolic mirror or the concave mirror 19 so as to obtain the distance to the object 100 and the direction of the same in accordance with propagation delay time taking from light emission by the light generating means 1 to receipt of reflected light by the light receiving device 20.

Optical radar apparatus

An optical radar device has a vertical deflecting device which deflects an optical beam so as to emit the optical beam horizontally in a first half of reciprocal scanning in a horizontal direction and a part thereof upwards by a predetermined angle in a second half thereof. Thus, the optical radar device can detect both objects each with a reflecting portion installed at a low position such as a car and at a high position such as a truck.

Optical radar device

An optical radar apparatus which includes a light emitter for emitting light, a light transmitter and reflector for reflecting and transmitting the light, a reflected light reflector for receiving the light which has Keen reflected by an object, and for reflecting the received light, and a light-responsive device which is located in a horizontal direction from the light emitter, and which receives the light reflected by the reflected light reflector. A rotatable holding member holds the light transmitter and reflector and the reflected light reflector at predetermined positions relative to one another. A scanner rotates the holding member to scan the light in the horizontal direction.

Growing community of inventors

Tokyo, Japan

Hiroshi Yamabuchi