Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki Kabushiki

Kenta Hatano

Sotsuo Miyoshi

Youichi Fujita

Satoshi Kawamura

Tomokuni Kato

Toshiyuki Umemoto

Naoki Miyamoto

Toshihiko Miyake

Hirofumi Doi

Satoshi Fujimura

Toshiyuki Yoshizawa

Hideaki Arita

Yoshitaka Ikitake

A control device for an actuator learns a reference position of a shaft when the operation of the engine of a vehicle is not obstructed in a period during which the engine is operating, and performs feedback control by using the reference position learned thereby in such a way that the position of the shaft detected by a position sensor gets close to a target position.

Control device for actuator, actuator, valve driving device and control method for actuator

A position sensor mounted in an actuator includes a magnetic detecting element for detecting the position of a shaft, and a temperature detecting element for detecting intra-sensor temperature which is used for correction of the temperature characteristics of the magnetic detecting element, the magnetic detecting element and the temperature detecting element being built therein. A control device for the actuator acquires both the temperature-corrected position of the shaft and the intra-sensor temperature from the position sensor, and uses them for control of the actuator.

A control device for a WG actuator includes a feedback control unit for performing feedback control on the WG actuator in such a way that the position of a shaft detected by a position sensor gets close to a target position, and an abnormality detecting unit for providing an instruction to move the shaft in an axial direction for the feedback control unit, and for detecting an abnormality in the WG actuator on the basis of a result of a movement of the shaft, the movement being detected by the position sensor while the feedback control unit performs the instruction.

Control device for actuator, actuator, valve driving device and abnormality detecting method for actuator

A permanent magnetfor biasing is placed between opposite surfaces of a second stationary magnetic bodyand a third stationary magnetic body, and a range in magnetic flux density detected by a magnetic sensoris changed to thus include zero in the magnetic flux density. A correction and an adjustment of a temperature characteristic and so on of the magnetic sensorare performed in a state of zero in the magnetic flux density.

Location detector device

A brushless motor position detection device has a set of first Hall elements (main Hall ICsfor detecting magnetic pole positions) and a set of second Hall elements (sub-Hall ICsfor detecting magnetic pole positions) mounted on a plane facing a magnetic pole position detecting magnetfor detecting the position of a rotor. They are subjected to offset adjustment and are mounted in such a manner that the difference between the maximum value of the magnetic flux density at the mounting positions of the first Hall elements and the maximum value of the magnetic flux density at the mounting positions of the second Hall elements is held within a prescribed limit (mounted in such a manner as to have the offset of a prescribed machine angle in the circumferential direction) to bring the detection accuracy of the plurality of sets of the Hall elements into agreement.

Brushless motor position detection device

A motor positioning structure is constructed by providing a plurality of positioning pinsfor positioning a circuit boardon a caseof a circuit main bodyand also providing receiving holesfor receiving the positioning pinsin a frameon the side of a stator in a motor main body

Motor positioning structure

An actuator having an output axis which is moved linearly by a rotatory force, and a boss for holding the above-mentioned output axis in such a way that the output axis can move linearly includes a connecting member for propagating the linear motion of the above-mentioned output axis to an external device. The above-mentioned connecting member is comprised of a joint connected to the above-mentioned output axis, and a link plate having an end rotatably connected to the above-mentioned joint, and another end rotatably connected to the external device. A mechanism for preventing rotation of the above-mentioned output axis is constructed of only a connecting portion for connecting the above-mentioned joint, the above-mentioned link plate, and the above-mentioned external device to one another.

Actuator having a rotation prevention link plate

A terminal structure for a vehicle-mounted motor includes a motor body having a motor terminalconnected to a coil, and a circuit bodyholding a circuit boardfor controlling a rotation of the motor body and is assembled in the motor body, wherein a stress relaxation sectionis provided in an intermediate of an intermediate conductor, in order to reduce stress acting on the intermediate conductorconnecting the motor terminaland the circuit boardand to thereby improve the conductive reliability of electrical joint.

Structure of motor terminal

A metallic memberis integrated with a molded rotorand a bearingis held to the rotorthrough this metallic memberAt that time, a washeris secured to the metallic member, and the rotating portion of the bearing is held by this washer, thereby improving holding property and durability of the bearing. A stopper platefor limiting the displacement of the output shaft of a motor is used as the metallic member, thereby enabling holding property and durability of the bearing to increase without increasing the number of components. The base-end side of the metallic memberis integrally in-mold molded with the rotorwhich enables the metallic memberto be firmly held.

Bearing holding structure for motor

Output shaft coupling structure of electrically operated control valve including: valve rod which is provided with valve for opening and closing fluid passage and is mounted to valve housing in such a way as to move along axial direction; and electrically controlled motor for driving the valve rod along the axial direction, the coupling structure couples motor shaft of the electrically controlled motor to the valve rod, and the plate shaped like a flat plate is fixed at its center to end portion, to which the valve rod is coupled, of the motor shaft and the plate is bent to form hooking and engaging portion at its both ends after the plate is fixed, thereby the plate hooks and engages with the valve rod.

Output shaft coupling structure of electrically operated control valve

A sliding hole is formed so that a screw portion can pass therethrough. Also, a seal member is provided at a portion, through which the screw portion placed in the sliding hole can pass and in which a sliding portion does not slide.

Motor which performs a rotational-to-linear motion conversion

An exhaust gas recirculation device includes: an exhaust gas recirculation passage of an engine; an EGR cooler provided within this exhaust gas recirculation passage; a bypass passage connected between the upstream and the downstream sides of the EGR cooler in the exhaust gas recirculation passage; an EGR valve provided within the exhaust gas recirculation passage on the downstream side of the EGR cooler; a bypass valve for opening and closing the bypass passage; and a valve controlling unit determining the timing period of flowing the high-temperature exhaust gas diverted from the EGR cooler into the EGR valve, and switchingly controlling the bypass valve such that during the timing period, the high-temperature exhaust gas is diverted from the EGR cooler and flown into the EGR valve through the bypass passage, and except during the timing period, the high-temperature exhaust gas is flown into the EGR valve to be circulated.

Exhaust gas recirculation apparatus

Motor for rotational-to-linear conversion with shaft seal

A water-cooled exhaust gas re-circulation device according to the invention has a hole-open/close mechanism allowing communication with outside air is arranged at a cooling water re-circulation passage cooling an exhaust gas re-circulation valve. A drain bolt is used as the hole-open/close mechanism. The hole-open/close mechanism is arranged at a stopper stopping up a hole formed during manufacturing the cooling water re-circulation passage.

Growing community of inventors

Tokyo, Japan

Kenta Hatano